Merge remote-tracking branch 'origin/main' into feat/export-service

- 引用块直接子节点为块级节点，PDF/DOCX 改为逐个渲染并继承缩进/颜色，
  不再交给行内渲染器导致正文丢失
- PDF 嵌套列表先输出父级正文再输出子列表，修复顺序颠倒
- 等待渲染槽位期间保持 queued 并监听取消，取消即时生效
- DOCX 列表项补处理直接 text 子节点，避免正文被块级渲染器丢弃
- 补充引用块/嵌套列表/排队取消的结构内容回归测试
- 接口契约同步 html/pdf/docx 三格式均已实现，移除 EXPORT_FORMAT_UNSUPPORTED

Co-Authored-By: Claude Code <noreply@anthropic.com>

.gitignore

@@ -18,6 +18,9 @@ backend/.env
 # 运行期生成的 SQLite 索引（vault 下的 Markdown 测试数据需提交）
 backend/data/*.db*
 backend/data/credentials/
+# 运行期导出的 HTML/PDF/DOCX 产物（不提交）
+backend/data/exports/
+backend/data/logs/
 # 阶段验收笔记（验收用，不提交）
 backend/data/vault/验收/
 # 本机 MCP 配置、授权状态及服务器工作目录不得提交。

README.md

@@ -4,7 +4,7 @@
 
 NotesAgent 是本地优先的 AI 笔记与知识库项目。当前可运行形态为 Vue/Vite Web 前端与 FastAPI AI Core：Markdown 和附件保存在本地 Vault，SQLite 管理元数据、全文索引、向量空间、搜索历史、AI 会话、任务、Agent Trace、多模态任务及运行诊断。AI 对话已接入知识库检索，会话与消息由后端持久化并供 Web 和桌面客户端共用。
 
-截至 2026-09-05，第一阶段及第二阶段 A～F 的工程范围已经合并到 `main`。当前已完成真实 Workspace、混合检索与知识库问答、Agent/Tool/Permission、Skill/Plugin、MCP 配置与调用、模型提供商与路由、RAG Benchmark，以及本地 Embedding、音频转写和片段级声纹聚类。Tauri/Rust Host、Stronghold、原生多 Vault 文件系统、生产级 MCP 沙箱和 Sync Server 尚未接入。
+截至 2026-09-06，第一阶段及第二阶段 A～F 的工程范围已经合并到 `main`。当前已完成真实 Workspace、混合检索与知识库问答、Agent/Tool/Permission、Skill/Plugin、MCP 配置与调用、模型提供商与路由、RAG Benchmark，以及本地 Embedding、音频转写和片段级声纹聚类。Tauri/Rust Host、Stronghold、原生多 Vault 文件系统、生产级 MCP 沙箱和 Sync Server 尚未接入。
 
 ## 目录
 
@@ -26,8 +26,24 @@ NotesAgent/
 - 多模态：API 优先，未配置或响应无效时回退本地；`local_only` 禁止远程调用。任务、修订、事件、来源和回退原因写入 SQLite。
 - 模型运行：默认 CPU，可选 CUDA 12.8 组件；固定模型 revision，按需启动独立子进程，交互检索优先排队，CUDA 初始化或显存失败时用同一冻结配置在 CPU 重试一次。
 - 可观测性：输入、输出、缓存命中、推理 Token 与音频用量卡片；本地运行诊断保留最近 200 条，不保存正文、文件路径、密钥或异常全文。
+- 运行日志：统一查看向量/模型错误、Agent、任务与 HTTP 操作；独立后台存储最近 20,000 条，支持错误码/关联 ID 筛选和游标分页。入口无需打开 Vault，详见 [后台运行日志与压力问题修复](docs/development/后台运行日志与压力问题修复.md)。
 - 界面偏好：设置页可即时切换全局中文/英文界面，并控制由系统词典提供的编辑器拼写检查；偏好目前保存于 Web 端设备配置，后续由 Tauri 配置存储接管。
 
+## 第二阶段最新合并（2026-09-06）
+
+PR #31 已合并。工作区打开与 HTTP 保存不再等待向量推理；正文和全文索引先可用，向量随后后台更新。“已保存”与“向量就绪”是两个独立状态。Skill / Plugin 支持 ZIP 安装与本地安装状态恢复，并已提供功能示例包；远程社区仍是第三阶段计划。
+
+新增开发说明：
+
+- [工作区后台索引与保存](docs/development/工作区后台索引与保存开发说明.md)：状态、并发、恢复和验证。
+- [模型隔离向量索引与增量登记](docs/development/模型隔离向量索引与增量登记.md)：持久化 sqlite-vec 空间、旧向量复用、外部新增文件增量计算与检索性能验证。
+- [Mermaid 预览与缩放](docs/development/Mermaid预览与缩放开发说明.md)：大图适配、鼠标缩放和文字裁切修复。
+- [扩展安装持久化与社区包](docs/development/扩展安装持久化与社区包开发说明.md)：安装边界和示例包验证。
+- [模型上下文管理](docs/development/模型上下文管理.md)：全局人设、预算估算和摘要限制。
+- [第三阶段实施规划](docs/architecture/第三阶段实施规划.md)：Tauri Rust 容器、各社区与 Sync Server。
+
+代码基线 `a5c44c4` 的验证结果为后端 621 项、前端 345 项测试通过，前端生产构建通过。这是该提交的回归记录，不表示全部真实厂商及设备场景完成专项验收。
+
 ## 本地模型
 
 | 能力 | 当前模型 | 许可 | 说明 |

backend/README.md

@@ -101,3 +101,9 @@ uv run pytest
 - [阶段 F：Embedding 与知识库问题](../docs/retrospectives/阶段F-Embedding与知识库问题与解决方案.md)
 
 机器可读接口以运行中的 `/openapi.json` 为准。
+
+## 工作区保存与扩展恢复（2026-09-06）
+
+HTTP 保存先写正文、元数据及 FTS，再调度后台向量更新；打开 Vault 的向量计算也不再阻塞入口。手动全量重建接口仍等待完成。待处理标记持久化，重新打开 Vault 可恢复处理；任务详情不是完整持久化队列。
+
+实现与验证见 [工作区后台索引与保存](../docs/development/工作区后台索引与保存开发说明.md)。扩展安装日志、ZIP 限制和社区包测试见 [扩展安装持久化与社区包](../docs/development/扩展安装持久化与社区包开发说明.md)。

backend/app/agent/async_trace.py

@@ -0,0 +1,51 @@
+"""Serialize and batch durable Trace writes off the asyncio event loop."""
+import asyncio
+from contextvars import copy_context
+
+
+class AsyncTraceWriter:
+    def __init__(self, repository):
+        self.repository = repository
+        self.queue = asyncio.Queue(maxsize=1024)
+        self.worker = None
+
+    async def submit(self, operation, *args):
+        future = asyncio.get_running_loop().create_future()
+        await self.queue.put((operation, args, future))
+        if self.worker is None or self.worker.done():
+            self.worker = asyncio.create_task(self._drain())
+        # Cancellation must not let an older snapshot commit after cancellation.
+        cancelled = False
+        while not future.done():
+            try:
+                await asyncio.shield(future)
+            except asyncio.CancelledError:
+                cancelled = True
+        future.result()
+        return cancelled
+
+    async def _drain(self):
+        while not self.queue.empty():
+            batch = []
+            while len(batch) < 64 and not self.queue.empty():
+                batch.append(self.queue.get_nowait())
+            try:
+                work = asyncio.get_running_loop().run_in_executor(
+                    None, copy_context().run, self.repository.write_batch, [(op, args) for op, args, _ in batch])
+                # asyncio.run/shutdown may cancel every Task simultaneously. The
+                # executor Future survives; finish it and release all waiters.
+                while not work.done():
+                    try:
+                        await asyncio.shield(work)
+                    except asyncio.CancelledError:
+                        pass
+                work.result()
+            except Exception as exc:
+                for _, _, future in batch:
+                    future.set_exception(exc)
+            else:
+                for _, _, future in batch:
+                    future.set_result(None)
+            finally:
+                for _ in batch:
+                    self.queue.task_done()

backend/app/agent/runtime.py

@@ -4,6 +4,8 @@ from __future__ import annotations
 
 import asyncio
 import json
+from app.agent.async_trace import AsyncTraceWriter
+from app.operation_logs import log_event, agent_run_id
 from collections.abc import AsyncIterator
 from dataclasses import dataclass, field
 from datetime import datetime, timezone
@@ -65,6 +67,9 @@ class RunRecord:
     subscribers: set[asyncio.Queue[AgentEvent]] = field(default_factory=set)
     task: asyncio.Task[None] | None = None
     next_sequence: int = 0
+    publish_lock: asyncio.Lock = field(default_factory=asyncio.Lock)
+    cancel_lock: asyncio.Lock = field(default_factory=asyncio.Lock)
+    persisted_run: AgentRun | None = None
 
 
 class AgentRuntime:
@@ -84,6 +89,7 @@ class AgentRuntime:
         self.skills = skills
         self.trace_repository = trace_repository or AgentTraceRepository()
         self._records: dict[str, RunRecord] = {}
+        self._writer = AsyncTraceWriter(self.trace_repository)
 
     async def create_run(self, request: AgentRunCreateRequest) -> AgentRun:
         self._prune_records()
@@ -122,19 +128,25 @@ class AgentRuntime:
             skill_config=skill_config,
             allowed_tools=allowed_tools,
         )
-        self.trace_repository.create_run(
-            run,
-            request,
-            self._config_snapshot(record),
-        )
+        # Reserve capacity before yielding to concurrent creators.
         self._records[run.run_id] = record
+        try:
+            cancelled = await self._writer.submit('create', run.model_copy(deep=True), request.model_copy(deep=True), self._config_snapshot(record))
+        except BaseException:
+            self._records.pop(run.run_id, None)
+            raise
+        record.persisted_run = run.model_copy(deep=True)
+        log_event('agent', 'run.created', run_id=run.run_id, provider_id=run.provider_id, model=run.model)
+        if cancelled:
+            await self._finish_cancelled(record)
+            raise asyncio.CancelledError
         record.task = asyncio.create_task(self._execute(record), name=run.run_id)
         return run.model_copy(deep=True)
 
     def get_run(self, run_id: str) -> AgentRun:
         record = self._records.get(run_id)
         if record is not None:
-            return record.run.model_copy(deep=True)
+            return (record.persisted_run or record.run).model_copy(deep=True)
         run = self.trace_repository.recover_interrupted(run_id)
         if run is None:
             raise AgentRunNotFoundError(run_id)
@@ -145,7 +157,7 @@ class AgentRuntime:
         recovered = [
             self.trace_repository.recover_interrupted(item.run_id) or item
             if item.run_id not in self._records
-            else self._records[item.run_id].run.model_copy(deep=True)
+            else (self._records[item.run_id].persisted_run or self._records[item.run_id].run).model_copy(deep=True)
             for item in items
         ]
         return recovered, total
@@ -154,25 +166,24 @@ class AgentRuntime:
         record = self._records.get(run_id)
         if record is None:
             return self.get_run(run_id)
-        if record.run.status in TERMINAL_STATUSES:
-            return record.run.model_copy(deep=True)
-        record.run.cancelled = True
-        record.run.status = AgentRunStatus.cancelled
-        record.run.updated_at = datetime.now(timezone.utc)
-        self.permissions.cancel_run(run_id)
-        self._publish(record, AgentEventType.run_cancelled, {})
+        async with record.cancel_lock:
             if record.task and not record.task.done():
+                if record.run.status not in TERMINAL_STATUSES:
                     record.task.cancel()
-        return record.run.model_copy(deep=True)
+                    self.permissions.cancel_run(run_id)
+                await asyncio.gather(record.task, return_exceptions=True)
+            if record.run.status not in TERMINAL_STATUSES:
+                await self._finish_cancelled(record)
+            return (record.persisted_run or record.run).model_copy(deep=True)
 
-    def resolve_permission(self, run_id: str, request_id: str, decision: str) -> bool:
+    async def resolve_permission(self, run_id: str, request_id: str, decision: str) -> bool:
         record = self._records.get(run_id)
         if record is None:
             return False
         ticket = self.permissions.get_ticket(run_id, request_id)
         resolved = self.permissions.resolve(run_id, request_id, decision)
         if resolved:
-            self._publish(
+            await self._publish(
                 record,
                 AgentEventType.permission_resolved,
                 {
@@ -189,23 +200,24 @@ class AgentRuntime:
         record = self._records.get(run_id)
         run = self.get_run(run_id)
         if record is None:
-            for event in self.trace_repository.list_events(
+            for event in await asyncio.to_thread(self.trace_repository.list_events,
                 run_id, after_sequence=after_sequence
             ):
                 yield event
             return
 
-        # 先注册订阅再读持久化历史；同一事件循环内没有 await，不会丢失交界事件。
+        # 先注册再异步读取历史；历史与实时队列的交界用 sequence 去重。
         queue: asyncio.Queue[AgentEvent] = asyncio.Queue()
         record.subscribers.add(queue)
-        history = self.trace_repository.list_events(
-            run_id, after_sequence=after_sequence
-        )
         last_sequence = after_sequence
         try:
+            history = await asyncio.to_thread(self.trace_repository.list_events,
+                run_id, after_sequence=after_sequence)
             for event in history:
                 last_sequence = event.sequence
                 yield event
+                if event.event in {AgentEventType.run_completed, AgentEventType.run_failed, AgentEventType.run_cancelled}:
+                    return
             if run.status in TERMINAL_STATUSES:
                 return
             while True:
@@ -232,7 +244,7 @@ class AgentRuntime:
                 await asyncio.shield(record.task)
             except asyncio.CancelledError:
                 pass
-        return record.run.model_copy(deep=True)
+        return (record.persisted_run or record.run).model_copy(deep=True)
 
     def get_trace(
         self, run_id: str, *, after_sequence: int, limit: int
@@ -246,23 +258,35 @@ class AgentRuntime:
         return trace
 
     async def _execute(self, record: RunRecord) -> None:
+        token = agent_run_id.set(record.run.run_id)
         try:
             async with asyncio.timeout(record.request.run_timeout_seconds):
                 await self._run_loop(record)
         except asyncio.CancelledError:
             if record.run.status != AgentRunStatus.cancelled:
-                self._finish_cancelled(record)
+                await self._finish_cancelled(record)
         except TimeoutError:
-            self._fail(record, "AGENT_TIMEOUT", "Agent run exceeded its timeout.")
+            await self._fail(record, "AGENT_TIMEOUT", "Agent run exceeded its timeout.")
         except ProviderError as exc:
-            self._fail(record, exc.code, exc.message)
+            await self._fail(record, exc.code, exc.message)
         except Exception as exc:
-            self._fail(record, "AGENT_FAILED", str(exc))
+            log_event('agent', 'execution.failed', level='ERROR', error=exc, run_id=record.run.run_id)
+            await self._fail(record, "AGENT_FAILED", str(exc))
+        finally:
+            self.permissions.cancel_run(record.run.run_id)
+            agent_run_id.reset(token)
+
+    async def shutdown(self) -> None:
+        results = await asyncio.gather(*(self.cancel(run_id) for run_id in list(self._records)), return_exceptions=True)
+        for result in results:
+            if isinstance(result, BaseException):
+                log_event('agent', 'shutdown.failed', level='ERROR', error=result)
+        await self._writer.queue.join()
 
     async def _run_loop(self, record: RunRecord) -> None:
         record.run.status = AgentRunStatus.running
         record.run.updated_at = datetime.now(timezone.utc)
-        self._publish(
+        await self._publish(
             record,
             AgentEventType.run_started,
             {"provider_id": record.request.provider_id, "model": record.request.model},
@@ -277,7 +301,7 @@ class AgentRuntime:
             record.run.updated_at = datetime.now(timezone.utc)
             model_call_id = f"model_call_{uuid4().hex}"
             started_at = perf_counter()
-            self._publish(
+            await self._publish(
                 record,
                 AgentEventType.model_call_started,
                 {
@@ -299,7 +323,7 @@ class AgentRuntime:
                     )
                 )
             except Exception as exc:
-                self._publish(
+                await self._publish(
                     record,
                     AgentEventType.model_call_failed,
                     {
@@ -309,7 +333,7 @@ class AgentRuntime:
                     },
                 )
                 raise
-            self._publish(
+            await self._publish(
                 record,
                 AgentEventType.model_call_completed,
                 {
@@ -322,7 +346,7 @@ class AgentRuntime:
                 },
             )
             record.run.token_usage += turn.input_tokens + turn.output_tokens
-            self._publish(
+            await self._publish(
                 record,
                 AgentEventType.usage,
                 {"token_usage": record.run.token_usage},
@@ -331,12 +355,12 @@ class AgentRuntime:
                 record.request.token_budget is not None
                 and record.run.token_usage > record.request.token_budget
             ):
-                self._fail(record, "TOKEN_BUDGET_EXCEEDED", "Agent token budget exceeded.")
+                await self._fail(record, "TOKEN_BUDGET_EXCEEDED", "Agent token budget exceeded.")
                 return
 
             if turn.tool_calls:
                 if len(turn.tool_calls) > MAX_TOOL_CALLS_PER_TURN:
-                    self._fail(
+                    await self._fail(
                         record,
                         "TOO_MANY_TOOL_CALLS",
                         f"Provider requested more than {MAX_TOOL_CALLS_PER_TURN} tools in one turn.",
@@ -360,10 +384,17 @@ class AgentRuntime:
                     async with semaphore:
                         return await self._execute_tool(record, call, model_call_id)
 
-                results = await asyncio.gather(*(execute(call) for call in calls))
+                executions = [asyncio.create_task(execute(call)) for call in calls]
+                try:
+                    results = await asyncio.gather(*executions)
+                finally:
+                    for execution in executions:
+                        if not execution.done():
+                            execution.cancel()
+                    await asyncio.gather(*executions, return_exceptions=True)
                 for call, result in zip(calls, results):
                     record.run.tool_results.append(result)
-                    self._collect_citations(record, result)
+                    await self._collect_citations(record, result)
                     messages.append(
                         Message(
                             role=MessageRole.tool,
@@ -376,20 +407,20 @@ class AgentRuntime:
 
             if turn.text is not None:
                 record.run.output = turn.text
-                self._publish(record, AgentEventType.text_delta, {"text": turn.text})
+                await self._publish(record, AgentEventType.text_delta, {"text": turn.text})
                 record.run.status = AgentRunStatus.completed
                 record.run.updated_at = datetime.now(timezone.utc)
-                self._publish(
+                await self._publish(
                     record,
                     AgentEventType.run_completed,
                     {"output": turn.text, "token_usage": record.run.token_usage},
                 )
                 return
 
-            self._fail(record, "EMPTY_MODEL_RESPONSE", "Provider returned no text or tool call.")
+            await self._fail(record, "EMPTY_MODEL_RESPONSE", "Provider returned no text or tool call.")
             return
 
-        self._fail(record, "MAX_STEPS_EXCEEDED", "Agent reached its maximum step count.")
+        await self._fail(record, "MAX_STEPS_EXCEEDED", "Agent reached its maximum step count.")
 
     async def _execute_tool(
         self, record: RunRecord, call: ToolCall, parent_model_call_id: str
@@ -397,7 +428,7 @@ class AgentRuntime:
         started_at = perf_counter()
         call_data = call.model_dump(mode="json")
         call_data["parent_model_call_id"] = parent_model_call_id
-        self._publish(record, AgentEventType.tool_call, call_data)
+        await self._publish(record, AgentEventType.tool_call, call_data)
         try:
             registered = self.tools.get(call.name)
         except ToolNotFoundError:
@@ -411,7 +442,7 @@ class AgentRuntime:
                 error_code="TOOL_NOT_ALLOWED",
                 error_message="Tool is not included in allowed_tools.",
             )
-            self._publish_tool_result(
+            await self._publish_tool_result(
                 record, result, parent_model_call_id, started_at
             )
             return result
@@ -425,7 +456,7 @@ class AgentRuntime:
                 error_code="NETWORK_NOT_ALLOWED",
                 error_message="Agent run does not allow network tools.",
             )
-            self._publish_tool_result(
+            await self._publish_tool_result(
                 record, result, parent_model_call_id, started_at
             )
             return result
@@ -436,7 +467,7 @@ class AgentRuntime:
             # 运行状态必须在等待期间可见，前端才能展示并处理权限确认卡片。
             ticket = self.permissions.create_ticket(record.run.run_id, permission)
             record.run.status = AgentRunStatus.waiting_permission
-            self._publish(
+            await self._publish(
                 record,
                 AgentEventType.permission_required,
                 {
@@ -458,13 +489,18 @@ class AgentRuntime:
                     error_code="PERMISSION_TIMEOUT",
                     error_message="Tool permission confirmation timed out.",
                 )
-                self._publish_tool_result(
+                await self._publish_tool_result(
                     record, result, parent_model_call_id, started_at
                 )
                 return result
             record.run.status = AgentRunStatus.running
             record.run.updated_at = datetime.now(timezone.utc)
-            self.trace_repository.save_run(record.run)
+            async with record.publish_lock:
+                snapshot = record.run.model_copy(deep=True)
+                cancelled = await self._writer.submit('save', snapshot)
+                record.persisted_run = snapshot
+                if cancelled:
+                    raise asyncio.CancelledError
             result = (
                 await self._invoke_tool(record, call)
                 if decision in {"allow_once", "allow_session"}
@@ -473,10 +509,10 @@ class AgentRuntime:
         else:
             result = await self._invoke_tool(record, call)
 
-        self._publish_tool_result(record, result, parent_model_call_id, started_at)
+        await self._publish_tool_result(record, result, parent_model_call_id, started_at)
         return result
 
-    def _publish_tool_result(
+    async def _publish_tool_result(
         self,
         record: RunRecord,
         result: ToolResult,
@@ -486,7 +522,7 @@ class AgentRuntime:
         data = result.model_dump(mode="json")
         data["parent_model_call_id"] = parent_model_call_id
         data["duration_ms"] = int((perf_counter() - started_at) * 1000)
-        self._publish(record, AgentEventType.tool_result, data)
+        await self._publish(record, AgentEventType.tool_result, data)
 
     async def _invoke_tool(self, record: RunRecord, call: ToolCall) -> ToolResult:
         try:
@@ -519,28 +555,30 @@ class AgentRuntime:
             error_message="Tool permission was denied.",
         )
 
-    def _finish_cancelled(self, record: RunRecord) -> None:
+    async def _finish_cancelled(self, record: RunRecord) -> None:
         record.run.cancelled = True
         record.run.status = AgentRunStatus.cancelled
         record.run.updated_at = datetime.now(timezone.utc)
-        self._publish(record, AgentEventType.run_cancelled, {})
+        await self._publish(record, AgentEventType.run_cancelled, {})
 
-    def _fail(self, record: RunRecord, code: str, message: str) -> None:
-        if record.run.status in TERMINAL_STATUSES:
+    async def _fail(self, record: RunRecord, code: str, message: str) -> None:
+        log_event('agent', 'run.error', level='ERROR', run_id=record.run.run_id, error_code=code)
+        if record.persisted_run and record.persisted_run.status in TERMINAL_STATUSES:
             return
         record.run.status = AgentRunStatus.failed
         record.run.error_code = code
         record.run.error_message = message
         record.run.updated_at = datetime.now(timezone.utc)
-        self._publish(
+        await self._publish(
             record,
             AgentEventType.run_failed,
             {"code": code, "message": message},
         )
 
-    def _publish(
+    async def _publish(
         self, record: RunRecord, event_type: AgentEventType, data: dict[str, object]
     ) -> None:
+        async with record.publish_lock:
             sanitized = sanitize_trace_value(data)
             assert isinstance(sanitized, dict)
             event = AgentEvent(
@@ -550,14 +588,27 @@ class AgentRuntime:
                 data=sanitized,
                 timestamp=datetime.now(timezone.utc),
             )
+            snapshot = record.run.model_copy(deep=True)
+            try:
+                cancelled = await self._writer.submit('event', snapshot, event)
+            except Exception as exc:
+                log_event('agent', 'trace.write_failed', level='ERROR', error=exc, run_id=record.run.run_id)
+                raise
             record.next_sequence += 1
+            record.persisted_run = snapshot
             record.events.append(event)
-        self.trace_repository.append_event(record.run, event)
+            log_event('agent', event_type.value,
+                      level='ERROR' if event_type.value.endswith('Failed') or data.get('success') is False else 'INFO',
+                      run_id=record.run.run_id, provider_id=record.run.provider_id, model=record.run.model,
+                      sequence=event.sequence, step=record.run.current_step, status=snapshot.status.value,
+                      tool=data.get('name'), error_code=data.get('code') or data.get('error_code'))
             # 内存只保留实时订阅窗口；完整审计轨迹由 SQLite 保存。
             if len(record.events) > MAX_EVENTS_PER_RUN:
                 del record.events[: len(record.events) - MAX_EVENTS_PER_RUN]
             for queue in record.subscribers:
                 queue.put_nowait(event)
+            if cancelled:
+                raise asyncio.CancelledError
 
     @staticmethod
     def _request_metadata(record: RunRecord) -> dict[str, object]:
@@ -583,7 +634,7 @@ class AgentRuntime:
             "metadata": record.request.metadata,
         }
 
-    def _collect_citations(self, record: RunRecord, result: ToolResult) -> None:
+    async def _collect_citations(self, record: RunRecord, result: ToolResult) -> None:
         if not result.success or not isinstance(result.output, dict):
             return
         items = result.output.get("items")
@@ -601,7 +652,7 @@ class AgentRuntime:
                 continue
             known.add(citation.citation_id)
             record.run.citations.append(citation)
-            self._publish(record, AgentEventType.citation, citation.model_dump(mode="json"))
+            await self._publish(record, AgentEventType.citation, citation.model_dump(mode="json"))
 
     def _get_record(self, run_id: str) -> RunRecord:
         try:
@@ -618,7 +669,7 @@ class AgentRuntime:
             (
                 record
                 for record in self._records.values()
-                if record.run.status in TERMINAL_STATUSES
+                if record.run.status in TERMINAL_STATUSES and (record.task is None or record.task.done())
             ),
             key=lambda record: record.run.updated_at,
         )

backend/app/agent/trace_repository.py

@@ -6,6 +6,7 @@ SQLite 中的事件是 SSE、前端 Trace 和 Benchmark 的共同事实来源。
 
 from __future__ import annotations
 
+from contextlib import nullcontext
 import json
 import re
 from datetime import datetime, timezone
@@ -94,15 +95,30 @@ def sanitize_trace_value(
 
 
 class AgentTraceRepository:
+    def write_batch(self, jobs):
+        conn = connect()
+        try:
+            with transaction(conn):
+                for operation, args in jobs:
+                    if operation == 'create':
+                        self.create_run(*args, _conn=conn)
+                    elif operation == 'save':
+                        self.save_run(*args, _conn=conn)
+                    else:
+                        self.append_event(*args, _conn=conn)
+        finally:
+            conn.close()
+
     def create_run(
         self,
         run: AgentRun,
         request: AgentRunCreateRequest,
         config_snapshot: dict[str, Any],
+        *, _conn=None,
     ) -> None:
-        conn = connect()
+        conn = _conn or connect()
         try:
-            with transaction(conn):
+            with transaction(conn) if _conn is None else nullcontext():
                 conn.execute(
                     """
                     INSERT INTO agent_runs(
@@ -126,22 +142,24 @@ class AgentTraceRepository:
                     ),
                 )
         finally:
+            if _conn is None:
                 conn.close()
 
-    def save_run(self, run: AgentRun) -> None:
-        conn = connect()
+    def save_run(self, run: AgentRun, *, _conn=None) -> None:
+        conn = _conn or connect()
         try:
-            with transaction(conn):
+            with transaction(conn) if _conn is None else nullcontext():
                 self._update_run(conn, run)
         finally:
+            if _conn is None:
                 conn.close()
 
-    def append_event(self, run: AgentRun, event: AgentEvent) -> None:
+    def append_event(self, run: AgentRun, event: AgentEvent, *, _conn=None) -> None:
         """在同一事务中保存最新 Run 和事件；复写同一序号时保持幂等。"""
 
-        conn = connect()
+        conn = _conn or connect()
         try:
-            with transaction(conn):
+            with transaction(conn) if _conn is None else nullcontext():
                 self._update_run(conn, run)
                 conn.execute(
                     """
@@ -158,6 +176,7 @@ class AgentTraceRepository:
                     ),
                 )
         finally:
+            if _conn is None:
                 conn.close()
 
     def get_run(self, run_id: str) -> AgentRun | None:

backend/app/config.py

@@ -25,6 +25,7 @@ class Settings:
     vault_path: Path
     attachments_path: Path
     benchmark_datasets_path: Path
+    exports_path: Path
 
 
 @lru_cache
@@ -45,4 +46,5 @@ def get_settings() -> Settings:
         benchmark_datasets_path=Path(
             os.getenv("APP_BENCHMARK_DATASETS_PATH", str(data_dir / "benchmarks"))
         ),
+        exports_path=Path(os.getenv("APP_EXPORTS_PATH", str(data_dir / "exports"))),
     )

backend/app/contracts.py

@@ -2,7 +2,14 @@ from datetime import datetime
 from enum import Enum
 from typing import Annotated, Any, Literal
 
-from pydantic import BaseModel, ConfigDict, Field, SecretStr, field_validator, model_validator
+from pydantic import (
+    BaseModel,
+    ConfigDict,
+    Field,
+    SecretStr,
+    field_validator,
+    model_validator,
+)
 from app.request_overrides import RequestOverride
 
 
@@ -116,6 +123,7 @@ class NoteUpdateRequest(Contract):
     title: str | None = None
     markdown: str | None = None
     tags: list[str] | None = None
+    expected_content_hash: str | None = Field(default=None, pattern=r"^[0-9a-f]{64}$")
 
 
 class NoteMoveRequest(Contract):
@@ -1131,6 +1139,11 @@ class TranscriptNoteRequest(Contract):
 
 
 class IndexStatus(Contract):
+    running_jobs: int = 0
+    active_searches: int = 0
+    completed_searches: int = 0
+    failed_searches: int = 0
+    cancelled_searches: int = 0
     vector_refresh_required: bool = False
     total_notes: int = 0
     total_blocks: int = 0
@@ -1301,3 +1314,88 @@ class BenchmarkReport(Contract):
     cases: list[RAGCaseResult] = Field(default_factory=list)
     error: str | None = None
     error_code: str | None = None
+
+
+# Export（多格式文档导出）
+class ExportStatus(str, Enum):
+    queued = "queued"
+    running = "running"
+    completed = "completed"
+    failed = "failed"
+    cancelled = "cancelled"
+
+
+class ExportFormat(str, Enum):
+    html = "html"
+    pdf = "pdf"
+    docx = "docx"
+
+
+class ExportSourceType(str, Enum):
+    note = "note"
+    markdown = "markdown"
+
+
+class ExportSource(Contract):
+    """导出源：note 引用已索引笔记，markdown 用于未保存预览（不持久化）。"""
+
+    type: ExportSourceType
+    note_id: str | None = None
+    markdown: str | None = None
+
+    @model_validator(mode="after")
+    def _validate_source(self) -> "ExportSource":
+        if self.type == ExportSourceType.note and not self.note_id:
+            raise ValueError("note source requires note_id")
+        if self.type == ExportSourceType.markdown and not self.markdown:
+            raise ValueError("markdown source requires markdown")
+        return self
+
+
+class ExportOptions(Contract):
+    theme_id: str = "light"
+    include_title: bool = True
+    include_metadata: bool = False
+    page_size: str = "A4"
+    code_theme: str = "github-light"
+
+
+class ExportRequest(Contract):
+    source: ExportSource
+    format: ExportFormat
+    options: ExportOptions = Field(default_factory=ExportOptions)
+
+
+class ExportProgress(Contract):
+    phase: str
+    current: int
+    total: int
+    percent: float | None = None
+    message: str | None = None
+
+
+class ExportFile(Contract):
+    file_name: str
+    mime_type: str
+    size: int
+    sha256: str
+    expires_at: datetime
+
+
+class ExportJob(Contract):
+    job_id: str
+    status: ExportStatus
+    format: ExportFormat
+    progress: ExportProgress | None = None
+    file: ExportFile | None = None
+    warnings: list[str] = Field(default_factory=list)
+    error: str | None = None
+    error_code: str | None = None
+    created_at: datetime
+    started_at: datetime | None = None
+    completed_at: datetime | None = None
+
+
+class ExportJobListResponse(Contract):
+    items: list[ExportJob] = Field(default_factory=list)
+    page: PageMeta = Field(default_factory=PageMeta)

backend/app/errors.py

@@ -25,6 +25,10 @@ class ApiError(Exception):
 
 
 async def api_error_handler(_: Request, exc: ApiError) -> JSONResponse:
+    from app.operation_logs import log_event
+    log_event('api', 'operation.failed', level='ERROR' if exc.status_code >= 500 else 'WARNING',
+              error=exc, status=exc.status_code,
+              **{key: value for key, value in exc.details.items() if key in {'run_id', 'task_id', 'note_id', 'job_id', 'provider_id'}})
     body = ErrorResponse(
         error=ErrorDetail(code=exc.code, message=exc.message, details=exc.details)
     )

backend/app/export/__init__.py

@@ -0,0 +1,8 @@
+"""Export Service：多格式文档导出（首批 HTML）。
+
+模块划分：
+- document.py        Document AST 内部协议 + DocumentExporter Protocol + ExportResult
+- markdown.py        mistune → Document AST 解析
+- exporters/html.py  HtmlExporter（Document AST → HTML5）
+- service.py         导出任务注册表、后台执行、取消与文件生命周期
+"""

backend/app/export/document.py

@@ -0,0 +1,46 @@
+"""Document AST：导出器的内部中间表示（Internal Protocol，不放入 contracts.py）。
+
+契约 §10.3 规定节点用稳定判别字段 node_id / type / attributes / children / text，
+类型专有信息统一放 attributes（如 heading 的 level、link 的 href、image 的 src）。
+导出器据此递归渲染，对无法表示的节点记 warning，不静默丢弃。
+"""
+
+from __future__ import annotations
+
+from typing import Any, Protocol
+
+from pydantic import BaseModel, ConfigDict, Field
+
+from app.contracts import ExportOptions
+
+
+class DocumentNode(BaseModel):
+    """递归文档节点；type 取契约 §10.3 首批 node type 之一。"""
+
+    model_config = ConfigDict(extra="forbid")
+
+    type: str
+    node_id: str
+    attributes: dict[str, Any] = Field(default_factory=dict)
+    children: list["DocumentNode"] = Field(default_factory=list)
+    text: str = ""
+
+
+class Document(DocumentNode):
+    """根节点，type 固定为 document。"""
+
+    type: str = "document"
+
+
+class DocumentExporter(Protocol):
+    """导出器协议（契约 §10.3）：把 Document AST 渲染为指定格式的产物。"""
+
+    async def export(self, document: Document, options: ExportOptions) -> "ExportResult": ...
+
+
+class ExportResult(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    content: bytes
+    mime_type: str
+    warnings: list[str] = Field(default_factory=list)

backend/app/export/exporters/__init__.py

@@ -0,0 +1 @@
+"""Export 渲染器：Document AST → 具体格式产物。"""

backend/app/export/exporters/_common.py

@@ -0,0 +1,37 @@
+"""导出器共享工具：URL 协议校验与占位 warning 文案。
+
+html / pdf / docx 三个导出器共用同一套安全规则，避免各写一份导致行为漂移。
+"""
+
+from __future__ import annotations
+
+from datetime import datetime
+from urllib.parse import urlparse
+
+# 链接/图片地址允许的协议；无 scheme 的相对地址视为安全，其余协议一律降级
+ALLOWED_URL_SCHEMES = frozenset({"http", "https", "mailto"})
+
+MERMAID_WARNING = "mermaid 需前端渲染，已保留为占位代码块"
+RAW_HTML_WARNING = "原始 HTML 已按纯文本转义保留"
+# PDF/DOCX 暂不支持静态渲染函数图像，统一回退源码占位
+PLOT_PLACEHOLDER_WARNING = "函数图像：该格式暂不支持静态渲染，已保留为源码占位"
+
+
+def safe_url(url: str) -> str | None:
+    """校验 URL 协议；安全返回原串，不安全返回 None。"""
+    url = url.strip()
+    if not url:
+        return None
+    scheme = urlparse(url).scheme.lower()
+    if scheme and scheme not in ALLOWED_URL_SCHEMES:
+        return None
+    return url
+
+
+def format_meta_value(value: object) -> str:
+    """把元数据值转成可读文本：datetime 转 ISO、列表用逗号连接。"""
+    if isinstance(value, datetime):
+        return value.isoformat()
+    if isinstance(value, list):
+        return ", ".join(str(item) for item in value)
+    return str(value)

backend/app/export/exporters/docx.py

@@ -0,0 +1,341 @@
+"""DocxExporter：Document AST → DOCX（python-docx）。
+
+v1 为文本优先：标题/段落/行内强调与链接/列表/引用/表格/代码块/数学文本均可导出；
+function_plot 与 mermaid 保留源码占位并记 warning。中文字体通过 Normal 样式挂载
+w:eastAsia=宋体，保证 Word 打开时中文正常显示；bold/italic 由 Word 原生渲染。
+"""
+
+from __future__ import annotations
+
+from io import BytesIO
+
+from docx import Document as DocxDocument
+from docx.enum.text import WD_ALIGN_PARAGRAPH
+from docx.opc.constants import RELATIONSHIP_TYPE
+from docx.oxml import OxmlElement
+from docx.oxml.ns import qn
+from docx.shared import Inches, Mm, Pt, RGBColor
+
+from app.contracts import ExportOptions
+from app.export.document import Document, DocumentNode, ExportResult
+from app.export.exporters._common import (
+    MERMAID_WARNING,
+    PLOT_PLACEHOLDER_WARNING,
+    RAW_HTML_WARNING,
+    format_meta_value,
+    safe_url,
+)
+
+_MIME = "application/vnd.openxmlformats-officedocument.wordprocessingml.document"
+
+_HEADING_SIZES = {1: 20, 2: 16, 3: 14, 4: 12, 5: 11, 6: 10.5}
+
+
+def _plain_text(children: list[DocumentNode]) -> str:
+    """递归拼接行内节点的纯文本，供标题/链接文字等需要纯文本处使用。"""
+    parts: list[str] = []
+    for child in children:
+        if child.type == "text":
+            parts.append(child.text)
+        elif child.children:
+            parts.append(_plain_text(child.children))
+        elif child.text:
+            parts.append(child.text)
+    return "".join(parts)
+
+
+class DocxExporter:
+    """实现 DocumentExporter：递归渲染 Document AST 为 DOCX 字节流。"""
+
+    def render(self, document: Document, options: ExportOptions) -> ExportResult:
+        """同步渲染；CPU 密集，调用方应放入线程执行，避免阻塞事件循环。"""
+        self._doc = DocxDocument()
+        self._configure_normal_style()
+        self._configure_page(options)
+        warnings: list[str] = []
+
+        self._render_header(document, options, warnings)
+        self._render_children(document.children, warnings)
+
+        buf = BytesIO()
+        self._doc.save(buf)
+        return ExportResult(content=buf.getvalue(), mime_type=_MIME, warnings=warnings)
+
+    async def export(self, document: Document, options: ExportOptions) -> ExportResult:
+        """契约要求的 async 接口；渲染本身同步，直接转发到 render。"""
+        return self.render(document, options)
+
+    def _configure_normal_style(self) -> None:
+        """Normal 样式挂载 CJK 字体；拉丁用 Calibri，中文用宋体。"""
+        style = self._doc.styles["Normal"]
+        style.font.name = "Calibri"
+        style.font.size = Pt(11)
+        rfonts = style.element.get_or_add_rPr().get_or_add_rFonts()
+        rfonts.set(qn("w:eastAsia"), "宋体")
+
+    def _configure_page(self, options: ExportOptions) -> None:
+        section = self._doc.sections[0]
+        size = (options.page_size or "A4").lower()
+        if size == "a4":
+            section.page_width = Mm(210)
+            section.page_height = Mm(297)
+        elif size == "letter":
+            section.page_width = Inches(8.5)
+            section.page_height = Inches(11)
+
+    # --- 文档头部 ---
+    def _render_header(self, document: Document, options: ExportOptions, warnings: list[str]) -> None:
+        title = str(document.attributes.get("title") or "")
+        if options.include_title and title:
+            p = self._doc.add_paragraph()
+            run = p.add_run(title)
+            run.bold = True
+            run.font.size = Pt(22)
+            p.paragraph_format.space_after = Pt(12)
+        if options.include_metadata:
+            metadata = document.attributes.get("metadata")
+            if metadata:
+                for key, value in metadata.items():
+                    p = self._doc.add_paragraph()
+                    run = p.add_run(f"{key}: {format_meta_value(value)}")
+                    run.font.size = Pt(9)
+                    run.font.color.rgb = RGBColor(0x57, 0x60, 0x6A)
+
+    # --- 块级 ---
+    def _render_children(self, children: list[DocumentNode], warnings: list[str]) -> None:
+        for child in children:
+            self._render_block(child, warnings)
+
+    def _render_block(self, node: DocumentNode, warnings: list[str]) -> None:
+        handler = getattr(self, f"_block_{node.type}", None)
+        if handler is not None:
+            handler(node, warnings)
+        else:
+            warnings.append(f"无法表示的节点类型已跳过：{node.type}")
+
+    def _block_heading(self, node: DocumentNode, warnings: list[str]) -> None:
+        level = max(1, min(6, int(node.attributes.get("level", 1))))
+        p = self._doc.add_paragraph()
+        run = p.add_run(_plain_text(node.children))
+        run.bold = True
+        run.font.size = Pt(_HEADING_SIZES[level])
+        p.paragraph_format.space_before = Pt(14 if level <= 2 else 10)
+        p.paragraph_format.space_after = Pt(6)
+
+    def _block_paragraph(self, node: DocumentNode, warnings: list[str]) -> None:
+        p = self._doc.add_paragraph()
+        self._render_inline(p, node.children, warnings)
+
+    def _block_blockquote(self, node: DocumentNode, warnings: list[str]) -> None:
+        # 引用块的直接子节点是块级节点（paragraph/list 等），不能交给行内渲染器，
+        # 否则正文会被当作「无法表示的行内节点」丢弃；逐个渲染并继承引用缩进/颜色。
+        for child in node.children:
+            if child.type == "paragraph":
+                p = self._doc.add_paragraph()
+                self._render_inline(p, child.children, warnings)
+                p.paragraph_format.left_indent = Pt(16)
+                for run in p.runs:
+                    run.font.color.rgb = RGBColor(0x57, 0x60, 0x6A)
+            elif child.type == "list":
+                self._block_list(child, warnings, level=1, color=RGBColor(0x57, 0x60, 0x6A))
+            else:
+                self._render_block(child, warnings)
+
+    def _block_list(
+        self,
+        node: DocumentNode,
+        warnings: list[str],
+        level: int = 0,
+        color: RGBColor | None = None,
+    ) -> None:
+        ordered = bool(node.attributes.get("ordered"))
+        for index, item in enumerate(node.children, start=1):
+            self._block_list_item(item, warnings, ordered, index, level, color)
+
+    def _block_list_item(
+        self,
+        item: DocumentNode,
+        warnings: list[str],
+        ordered: bool,
+        index: int,
+        level: int,
+        color: RGBColor | None = None,
+    ) -> None:
+        if item.attributes.get("task"):
+            marker = "☑ " if item.attributes.get("checked") else "☐ "
+        else:
+            marker = f"{index}. " if ordered else "• "
+        indent = Pt(18 + 18 * level)
+        first = True
+        for child in item.children:
+            if child.type == "list":
+                self._block_list(child, warnings, level + 1, color)
+                continue
+            p = self._doc.add_paragraph()
+            p.paragraph_format.left_indent = indent
+            if first:
+                self._add_run(p, marker)
+                first = False
+            if child.children:
+                # 段落或行内容器（strong/link 等）：渲染其行内子节点
+                self._render_inline(p, child.children, warnings)
+            else:
+                # 直接行内叶子节点（text 等）：拼进段落，不能交给块级渲染器（会丢弃正文）
+                self._add_run(p, child.text or "")
+            if color is not None:
+                for run in p.runs:
+                    run.font.color.rgb = color
+
+    def _block_table(self, node: DocumentNode, warnings: list[str]) -> None:
+        rows = node.children
+        ncols = max((len(r.children) for r in rows), default=0)
+        if not rows or ncols == 0:
+            return
+        table = self._doc.add_table(rows=len(rows), cols=ncols)
+        table.style = "Table Grid"
+        for ri, row in enumerate(rows):
+            head = bool(row.attributes.get("head"))
+            for ci in range(ncols):
+                cell = table.cell(ri, ci)
+                p = cell.paragraphs[0]
+                if ci < len(row.children):
+                    self._render_inline(p, row.children[ci].children, warnings, bold=head)
+
+    def _block_code_block(self, node: DocumentNode, warnings: list[str]) -> None:
+        lines = node.text.split("\n")
+        p = self._doc.add_paragraph()
+        self._shade_paragraph(p)
+        p.paragraph_format.left_indent = Pt(8)
+        p.paragraph_format.right_indent = Pt(8)
+        p.paragraph_format.space_before = Pt(6)
+        p.paragraph_format.space_after = Pt(8)
+        for i, line in enumerate(lines):
+            run = p.add_run(line)
+            run.font.name = "Consolas"
+            run.font.size = Pt(10)
+            if i < len(lines) - 1:
+                run.add_break()
+
+    def _block_thematic_break(self, node: DocumentNode, warnings: list[str]) -> None:
+        p = self._doc.add_paragraph()
+        pPr = p._p.get_or_add_pPr()
+        pBdr = OxmlElement("w:pBdr")
+        bottom = OxmlElement("w:bottom")
+        bottom.set(qn("w:val"), "single")
+        bottom.set(qn("w:sz"), "6")
+        bottom.set(qn("w:space"), "1")
+        bottom.set(qn("w:color"), "D0D7DE")
+        pBdr.append(bottom)
+        pPr.append(pBdr)
+
+    def _block_mermaid(self, node: DocumentNode, warnings: list[str]) -> None:
+        warnings.append(MERMAID_WARNING)
+        self._block_code_block(node, warnings)
+
+    def _block_function_plot(self, node: DocumentNode, warnings: list[str]) -> None:
+        warnings.append(PLOT_PLACEHOLDER_WARNING)
+        self._block_code_block(node, warnings)
+
+    def _block_math_block(self, node: DocumentNode, warnings: list[str]) -> None:
+        p = self._doc.add_paragraph()
+        p.alignment = WD_ALIGN_PARAGRAPH.CENTER
+        p.add_run(f"$${node.text}$$")
+
+    def _block_html_block(self, node: DocumentNode, warnings: list[str]) -> None:
+        # 原始 HTML 不可信，按纯文本保留正文
+        warnings.append(RAW_HTML_WARNING)
+        self._doc.add_paragraph(node.text)
+
+    # --- 行内（写入 run） ---
+    def _render_inline(
+        self,
+        paragraph,
+        children: list[DocumentNode],
+        warnings: list[str],
+        bold: bool = False,
+        italic: bool = False,
+    ) -> None:
+        for child in children:
+            self._render_inline_node(paragraph, child, warnings, bold, italic)
+
+    def _render_inline_node(
+        self, paragraph, node: DocumentNode, warnings: list[str], bold: bool, italic: bool
+    ) -> None:
+        t = node.type
+        if t == "text":
+            self._add_run(paragraph, node.text, bold=bold, italic=italic)
+        elif t == "strong":
+            self._render_inline(paragraph, node.children, warnings, bold=True, italic=italic)
+        elif t == "emphasis":
+            self._render_inline(paragraph, node.children, warnings, bold=bold, italic=True)
+        elif t == "codespan":
+            self._add_run(paragraph, node.text, code=True)
+        elif t == "link":
+            inner = _plain_text(node.children)
+            href = str(node.attributes.get("href") or "")
+            safe_href = safe_url(href)
+            if safe_href is None:
+                warnings.append(f"链接协议不安全，已降级为纯文本：{href!r}")
+                self._render_inline(paragraph, node.children, warnings, bold, italic)
+            else:
+                self._add_hyperlink(paragraph, safe_href, inner)
+        elif t == "image":
+            src = str(node.attributes.get("src") or "")
+            alt = str(node.attributes.get("alt") or "")
+            if safe_url(src) is None:
+                warnings.append(f"图片地址不安全，已跳过：{src!r}")
+            else:
+                warnings.append("图片未内嵌到 DOCX，已用替代文本表示")
+            if alt:
+                self._add_run(paragraph, alt)
+        elif t == "math_inline":
+            self._add_run(paragraph, f"\\({node.text}\\)")
+        elif t == "linebreak":
+            self._add_run(paragraph, "").add_break()
+        else:
+            warnings.append(f"无法表示的行内节点已跳过：{t}")
+
+    def _add_run(self, paragraph, text: str, bold: bool = False, italic: bool = False, code: bool = False):
+        run = paragraph.add_run(text)
+        run.bold = bold
+        run.italic = italic
+        if code:
+            run.font.name = "Consolas"
+            run.font.size = Pt(10)
+        return run
+
+    def _add_hyperlink(self, paragraph, url: str, text: str) -> None:
+        """写入可点击的超链接 run（python-docx 无公开 API，需手写 w:hyperlink）。"""
+        part = paragraph.part
+        r_id = part.relate_to(url, RELATIONSHIP_TYPE.HYPERLINK, is_external=True)
+        hyperlink = OxmlElement("w:hyperlink")
+        hyperlink.set(qn("r:id"), r_id)
+        run = OxmlElement("w:r")
+        rPr = OxmlElement("w:rPr")
+        rFonts = OxmlElement("w:rFonts")
+        rFonts.set(qn("w:ascii"), "Calibri")
+        rFonts.set(qn("w:hAnsi"), "Calibri")
+        rFonts.set(qn("w:eastAsia"), "宋体")
+        rPr.append(rFonts)
+        color = OxmlElement("w:color")
+        color.set(qn("w:val"), "0969DA")
+        rPr.append(color)
+        u = OxmlElement("w:u")
+        u.set(qn("w:val"), "single")
+        rPr.append(u)
+        run.append(rPr)
+        t = OxmlElement("w:t")
+        t.text = text
+        t.set(qn("xml:space"), "preserve")
+        run.append(t)
+        hyperlink.append(run)
+        paragraph._p.append(hyperlink)
+
+    def _shade_paragraph(self, paragraph, fill: str = "F2F2F2") -> None:
+        """给段落加浅灰底纹，用于代码块占位。"""
+        pPr = paragraph._p.get_or_add_pPr()
+        shd = OxmlElement("w:shd")
+        shd.set(qn("w:val"), "clear")
+        shd.set(qn("w:color"), "auto")
+        shd.set(qn("w:fill"), fill)
+        pPr.append(shd)

backend/app/export/exporters/html.py

@@ -0,0 +1,299 @@
+"""HtmlExporter：Document AST → 完整 HTML5 文档（内嵌基础 CSS）。
+
+mermaid 等无法静态表达的节点渲染为占位代码块并记 warning，不静默丢失；function_plot
+解析为静态 SVG 内嵌（解析失败回退占位并转诊断）；严重内容缺失由 service 层以
+EXPORT_UNSUPPORTED_CONTENT 判定，本层只负责逐节点渲染。
+"""
+
+from __future__ import annotations
+
+import html
+from datetime import datetime
+from urllib.parse import urlparse
+
+from app.contracts import ExportOptions
+from app.export.document import Document, DocumentNode, ExportResult
+from app.plot.renderer import FunctionPlotStaticRenderer, StaticRenderRequest
+
+_MERMAID_WARNING = "mermaid 需前端渲染，已保留为占位代码块"
+_RAW_HTML_WARNING = "原始 HTML 已按纯文本转义保留"
+
+# 链接/图片地址允许的协议；无 scheme 的相对地址视为安全，其余协议一律降级
+_ALLOWED_URL_SCHEMES = frozenset({"http", "https", "mailto"})
+
+# 单篇文档允许的函数图像数量上限，超出部分回退占位，防止多图块并发采样耗尽内存/线程
+_MAX_FUNCTION_PLOTS = 16
+# 单篇文档允许的函数图像累计 AST 节点预算，超出部分回退占位，防止组合复杂度（多图块
+# × 多表达式 × 深表达式）在采样求值时长时间占满 CPU
+_MAX_TOTAL_PLOT_NODES = 8000
+
+
+def _safe_url(url: str) -> str | None:
+    """校验 URL 协议；安全返回原串，不安全返回 None。"""
+    url = url.strip()
+    if not url:
+        return None
+    scheme = urlparse(url).scheme.lower()
+    if scheme and scheme not in _ALLOWED_URL_SCHEMES:
+        return None
+    return url
+
+_BASE_CSS = """
+body { margin: 0; background: #f6f7f9; color: #1f2328; font: 15px/1.7 -apple-system, 'Segoe UI', 'Microsoft YaHei', sans-serif; }
+article { max-width: 860px; margin: 0 auto; padding: 40px 48px; background: #fff; }
+article.theme-dark { background: #0d1117; color: #c9d1d9; }
+h1, h2, h3, h4, h5, h6 { line-height: 1.3; margin: 1.4em 0 0.6em; }
+h1.title { margin-top: 0; }
+p { margin: 0.6em 0; }
+a { color: #0969da; }
+code { font-family: 'JetBrains Mono', Consolas, monospace; font-size: 0.9em; background: #f0f1f3; padding: 0.15em 0.35em; border-radius: 3px; }
+pre { background: #f6f8fa; padding: 14px 16px; border-radius: 6px; overflow-x: auto; }
+pre.code-theme-github-dark { background: #0d1117; color: #c9d1d9; }
+pre code { background: none; padding: 0; }
+pre.mermaid, pre.function-plot { border: 1px dashed #d0d7de; }
+figure.function-plot { margin: 1em 0; text-align: center; }
+figure.function-plot svg { max-width: 100%; height: auto; }
+blockquote { margin: 0.8em 0; padding: 0.2em 1em; border-left: 4px solid #d0d7de; color: #57606a; }
+img { max-width: 100%; }
+table { border-collapse: collapse; margin: 0.8em 0; }
+th, td { border: 1px solid #d0d7de; padding: 6px 12px; }
+th { background: #f6f8fa; }
+dl.metadata { font-size: 0.85em; color: #57606a; border-top: 1px solid #eaeef2; border-bottom: 1px solid #eaeef2; padding: 0.6em 0; }
+dl.metadata dt { display: inline; font-weight: 600; margin-right: 0.4em; }
+dl.metadata dd { display: inline; margin: 0 1.2em 0 0; }
+.math, .math-block { overflow-x: auto; padding: 0.4em 0; }
+.task-list-item { list-style: none; }
+.task-list-item input { margin-right: 0.4em; }
+hr { border: none; border-top: 1px solid #d0d7de; margin: 1.4em 0; }
+""".strip()
+
+
+class HtmlExporter:
+    """实现 DocumentExporter：递归渲染 Document AST 为完整 HTML5 文档。"""
+
+    def render(self, document: Document, options: ExportOptions) -> ExportResult:
+        """同步渲染；CPU 密集，调用方应放入线程执行，避免阻塞事件循环。"""
+        self._options = options
+        self._plot_count = 0
+        self._plot_nodes = 0
+        self._plot_renderer = FunctionPlotStaticRenderer()
+        warnings: list[str] = []
+        body = self._render_children(document.children, warnings)
+        content = self._assemble(document, options, body, warnings)
+        return ExportResult(
+            content=content.encode("utf-8"), mime_type="text/html", warnings=warnings
+        )
+
+    async def export(self, document: Document, options: ExportOptions) -> ExportResult:
+        """契约要求的 async 接口；渲染本身同步，直接转发到 render。"""
+        return self.render(document, options)
+
+    def _assemble(
+        self, document: Document, options: ExportOptions, body: str, warnings: list[str]
+    ) -> str:
+        title = str(document.attributes.get("title") or "")
+        parts = [
+            "<!doctype html>",
+            '<html lang="zh-CN">',
+            "<head>",
+            '<meta charset="utf-8">',
+            '<meta name="viewport" content="width=device-width, initial-scale=1">',
+        ]
+        if title:
+            parts.append(f"<title>{html.escape(title)}</title>")
+        parts.append(f"<style>{_BASE_CSS}</style>")
+        parts.append("</head>")
+        parts.append("<body>")
+        parts.append(f'<article class="theme-{html.escape(options.theme_id)}">')
+        if options.include_title and title:
+            parts.append(f'<h1 class="title">{html.escape(title)}</h1>')
+        if options.include_metadata:
+            metadata = document.attributes.get("metadata")
+            if metadata:
+                parts.append(self._render_metadata(metadata))
+        parts.append(body)
+        parts.append("</article>")
+        parts.append("</body>")
+        parts.append("</html>")
+        return "\n".join(parts) + "\n"
+
+    def _render_metadata(self, metadata: dict) -> str:
+        entries = ["<dl", ' class="metadata">']
+        for key, value in metadata.items():
+            entries.append(f"<dt>{html.escape(str(key))}</dt>")
+            entries.append(f"<dd>{html.escape(self._fmt_meta_value(value))}</dd>")
+        entries.append("</dl>")
+        return "".join(entries)
+
+    @staticmethod
+    def _fmt_meta_value(value: object) -> str:
+        if isinstance(value, datetime):
+            return value.isoformat()
+        if isinstance(value, list):
+            return ", ".join(str(item) for item in value)
+        return str(value)
+
+    def _render_children(self, children: list[DocumentNode], warnings: list[str]) -> str:
+        return "".join(self._render_node(child, warnings) for child in children)
+
+    def _render_node(self, node: DocumentNode, warnings: list[str]) -> str:
+        handler = getattr(self, f"_render_{node.type}", None)
+        if handler is not None:
+            return handler(node, warnings)
+        warnings.append(f"无法表示的节点类型已跳过：{node.type}")
+        return ""
+
+    # --- 块级 ---
+    def _render_heading(self, node: DocumentNode, warnings: list[str]) -> str:
+        level = max(1, min(6, int(node.attributes.get("level", 1))))
+        return f"<h{level}>{self._render_children(node.children, warnings)}</h{level}>"
+
+    def _render_paragraph(self, node: DocumentNode, warnings: list[str]) -> str:
+        return f"<p>{self._render_children(node.children, warnings)}</p>"
+
+    def _render_blockquote(self, node: DocumentNode, warnings: list[str]) -> str:
+        return f"<blockquote>{self._render_children(node.children, warnings)}</blockquote>"
+
+    def _render_list(self, node: DocumentNode, warnings: list[str]) -> str:
+        tag = "ol" if node.attributes.get("ordered") else "ul"
+        return f"<{tag}>{self._render_children(node.children, warnings)}</{tag}>"
+
+    def _render_list_item(self, node: DocumentNode, warnings: list[str]) -> str:
+        inner = self._render_children(node.children, warnings)
+        if node.attributes.get("task"):
+            checked = " checked" if node.attributes.get("checked") else ""
+            return (
+                '<li class="task-list-item">'
+                f'<input type="checkbox" disabled{checked}>{inner}</li>'
+            )
+        return f"<li>{inner}</li>"
+
+    def _render_table(self, node: DocumentNode, warnings: list[str]) -> str:
+        rows = node.children
+        head_rows = [r for r in rows if r.attributes.get("head")]
+        body_rows = [r for r in rows if not r.attributes.get("head")]
+        parts = ["<table>"]
+        if head_rows:
+            parts.append("<thead>")
+            parts.extend(self._render_node(r, warnings) for r in head_rows)
+            parts.append("</thead>")
+        if body_rows:
+            parts.append("<tbody>")
+            parts.extend(self._render_node(r, warnings) for r in body_rows)
+            parts.append("</tbody>")
+        parts.append("</table>")
+        return "".join(parts)
+
+    def _render_table_row(self, node: DocumentNode, warnings: list[str]) -> str:
+        return f"<tr>{self._render_children(node.children, warnings)}</tr>"
+
+    def _render_table_cell(self, node: DocumentNode, warnings: list[str]) -> str:
+        tag = "th" if node.attributes.get("head") else "td"
+        return f"<{tag}>{self._render_children(node.children, warnings)}</{tag}>"
+
+    def _render_code_block(self, node: DocumentNode, warnings: list[str]) -> str:
+        lang = str(node.attributes.get("language") or "")
+        code = html.escape(node.text)
+        lang_cls = f' class="language-{html.escape(lang)}"' if lang else ""
+        theme = html.escape(self._options.code_theme)
+        return f'<pre class="code-theme-{theme}"><code{lang_cls}>{code}</code></pre>'
+
+    def _render_thematic_break(self, node: DocumentNode, warnings: list[str]) -> str:
+        return "<hr>"
+
+    def _render_mermaid(self, node: DocumentNode, warnings: list[str]) -> str:
+        warnings.append(_MERMAID_WARNING)
+        return f'<pre class="mermaid">{html.escape(node.text)}</pre>'
+
+    @staticmethod
+    def _format_plot_diagnostic(diag) -> str:
+        loc = f"（第 {diag.line} 行）" if diag.line else ""
+        return f"函数图像：{diag.message}{loc}"
+
+    def _render_function_plot(self, node: DocumentNode, warnings: list[str]) -> str:
+        # 文档级数量上限：超出部分直接回退占位，不解析不采样，防止海量图像耗尽资源
+        self._plot_count += 1
+        if self._plot_count > _MAX_FUNCTION_PLOTS:
+            warnings.append(
+                f"函数图像：文档内函数图像数量超过上限 {_MAX_FUNCTION_PLOTS}，已回退为源码占位"
+            )
+            return f'<pre class="function-plot">{html.escape(node.text)}</pre>'
+        # 解析与渲染共同纳入局部异常回退：单个图像失败只回退占位 + warning，
+        # 绝不阻断整篇导出（含复杂表达式触发的 RecursionError 等异常）。
+        try:
+            request = StaticRenderRequest(
+                kind="function_plot", source=node.text, theme=self._options.theme_id
+            )
+            parsed = self._plot_renderer.parse(request)
+            for diag in parsed.diagnostics:
+                warnings.append(self._format_plot_diagnostic(diag))
+            if parsed.plot is None:
+                return f'<pre class="function-plot">{html.escape(node.text)}</pre>'
+            # 文档级累计复杂度预算：超出后回退占位，不再采样求值
+            if self._plot_nodes + parsed.plot.node_count > _MAX_TOTAL_PLOT_NODES:
+                warnings.append(
+                    f"函数图像：文档内函数图像累计复杂度超过上限 {_MAX_TOTAL_PLOT_NODES} 节点，已回退为源码占位"
+                )
+                return f'<pre class="function-plot">{html.escape(node.text)}</pre>'
+            self._plot_nodes += parsed.plot.node_count
+            rendered = self._plot_renderer.render_plot(parsed.plot)
+        except Exception as exc:
+            warnings.append(f"函数图像：解析或渲染失败，已回退占位（{exc}）")
+            return f'<pre class="function-plot">{html.escape(node.text)}</pre>'
+        warnings.extend(rendered.warnings)
+        return f'<figure class="function-plot">{rendered.content}</figure>'
+
+    def _render_math_block(self, node: DocumentNode, warnings: list[str]) -> str:
+        return f'<div class="math-block">$${html.escape(node.text)}$$</div>'
+
+    def _render_html_block(self, node: DocumentNode, warnings: list[str]) -> str:
+        # 原始 HTML 不可信，转义为纯文本展示，保证正文不丢且无注入风险
+        warnings.append(_RAW_HTML_WARNING)
+        return f'<div class="raw-html">{html.escape(node.text)}</div>'
+
+    # --- 行内 ---
+    def _render_text(self, node: DocumentNode, warnings: list[str]) -> str:
+        return html.escape(node.text)
+
+    def _render_emphasis(self, node: DocumentNode, warnings: list[str]) -> str:
+        return f"<em>{self._render_children(node.children, warnings)}</em>"
+
+    def _render_strong(self, node: DocumentNode, warnings: list[str]) -> str:
+        return f"<strong>{self._render_children(node.children, warnings)}</strong>"
+
+    def _render_link(self, node: DocumentNode, warnings: list[str]) -> str:
+        inner = self._render_children(node.children, warnings)
+        href = str(node.attributes.get("href") or "")
+        safe_href = _safe_url(href)
+        if safe_href is None:
+            # 危险协议（如 javascript:）降级为纯文本，不输出可点击链接
+            warnings.append(f"链接协议不安全，已降级为纯文本：{href!r}")
+            return inner
+        title = str(node.attributes.get("title") or "")
+        attrs = [f'href="{html.escape(safe_href)}"']
+        if title:
+            attrs.append(f'title="{html.escape(title)}"')
+        return f"<a {' '.join(attrs)}>{inner}</a>"
+
+    def _render_codespan(self, node: DocumentNode, warnings: list[str]) -> str:
+        return f"<code>{html.escape(node.text)}</code>"
+
+    def _render_image(self, node: DocumentNode, warnings: list[str]) -> str:
+        src = str(node.attributes.get("src") or "")
+        alt = str(node.attributes.get("alt") or "")
+        safe_src = _safe_url(src)
+        if safe_src is None:
+            # 危险协议（如 data:/javascript:）跳过图片，仅输出 alt 文本
+            warnings.append(f"图片地址不安全，已跳过：{src!r}")
+            return html.escape(alt) if alt else ""
+        title = str(node.attributes.get("title") or "")
+        attrs = [f'src="{html.escape(safe_src)}"', f'alt="{html.escape(alt)}"']
+        if title:
+            attrs.append(f'title="{html.escape(title)}"')
+        return f"<img {' '.join(attrs)}>"
+
+    def _render_math_inline(self, node: DocumentNode, warnings: list[str]) -> str:
+        return f"\\({html.escape(node.text)}\\)"
+
+    def _render_linebreak(self, node: DocumentNode, warnings: list[str]) -> str:
+        return "<br>"

backend/app/export/exporters/pdf.py

@@ -0,0 +1,329 @@
+"""PdfExporter：Document AST → PDF（reportlab platypus）。
+
+v1 为文本优先：标题/段落/行内强调与链接/列表/引用/表格/代码块/数学文本均可导出；
+function_plot 与 mermaid 保留源码占位并记 warning。中文字体用 reportlab 内置
+STSong-Light CID 字体，避免外部字体依赖。CID 字体无独立 bold/italic 字重，
+故行内强调退化为普通文本（内容不丢、样式简化），标题靠字号区分层级。
+"""
+
+from __future__ import annotations
+
+import html as _html
+from io import BytesIO
+
+from reportlab.lib.enums import TA_CENTER
+from reportlab.lib.pagesizes import A4, letter
+from reportlab.lib.styles import ParagraphStyle
+from reportlab.lib.units import mm
+from reportlab.pdfbase import pdfmetrics
+from reportlab.pdfbase.cidfonts import UnicodeCIDFont
+from reportlab.platypus import (
+    Paragraph,
+    Preformatted,
+    SimpleDocTemplate,
+    Spacer,
+    Table,
+    TableStyle,
+)
+from reportlab.platypus.flowables import HRFlowable
+
+from app.contracts import ExportOptions
+from app.export.document import Document, DocumentNode, ExportResult
+from app.export.exporters._common import (
+    MERMAID_WARNING,
+    PLOT_PLACEHOLDER_WARNING,
+    RAW_HTML_WARNING,
+    format_meta_value,
+    safe_url,
+)
+
+_FONT = "STSong-Light"
+pdfmetrics.registerFont(UnicodeCIDFont(_FONT))
+
+_MIME = "application/pdf"
+
+_PAGE_SIZES = {"a4": A4, "letter": letter}
+
+# 标题字号随层级递减；标题不依赖粗体（CID 无粗体字重），靠字号拉开层级
+_HEADING_SIZES = {1: 20, 2: 16, 3: 14, 4: 12, 5: 11, 6: 10.5}
+# 引用块文字颜色，与 HtmlExporter 的引用灰一致
+_QUOTE_COLOR = "#57606a"
+
+
+def _make_styles() -> dict[str, ParagraphStyle]:
+    body = ParagraphStyle(
+        "pdf-body",
+        fontName=_FONT,
+        fontSize=10.5,
+        leading=16,
+        spaceAfter=6,
+    )
+    title = ParagraphStyle("pdf-title", parent=body, fontSize=22, leading=28, spaceAfter=12)
+    quote = ParagraphStyle(
+        "pdf-quote",
+        parent=body,
+        leftIndent=14,
+        textColor="#57606a",
+        spaceBefore=4,
+        spaceAfter=6,
+    )
+    code = ParagraphStyle(
+        "pdf-code",
+        parent=body,
+        fontSize=9,
+        leading=12,
+        leftIndent=6,
+        rightIndent=6,
+        backColor="#f6f8fa",
+        borderColor="#d0d7de",
+        borderWidth=0.5,
+        borderPadding=6,
+        spaceBefore=4,
+        spaceAfter=8,
+    )
+    math = ParagraphStyle("pdf-math", parent=body, alignment=TA_CENTER, spaceBefore=6)
+    cell = ParagraphStyle("pdf-cell", parent=body, fontSize=10, leading=14, spaceAfter=0)
+    cell_head = ParagraphStyle(
+        "pdf-cell-head", parent=cell, textColor="#1f2328", fontSize=10
+    )
+    meta = ParagraphStyle("pdf-meta", parent=body, fontSize=8.5, leading=13, textColor="#57606a")
+    styles: dict[str, ParagraphStyle] = {
+        "body": body,
+        "title": title,
+        "quote": quote,
+        "code": code,
+        "math": math,
+        "cell": cell,
+        "cell_head": cell_head,
+        "meta": meta,
+    }
+    for level, size in _HEADING_SIZES.items():
+        styles[f"h{level}"] = ParagraphStyle(
+            f"pdf-h{level}",
+            parent=body,
+            fontSize=size,
+            leading=size * 1.4,
+            spaceBefore=14 if level <= 2 else 10,
+            spaceAfter=6,
+        )
+    return styles
+
+
+class PdfExporter:
+    """实现 DocumentExporter：递归渲染 Document AST 为 PDF 字节流。"""
+
+    def render(self, document: Document, options: ExportOptions) -> ExportResult:
+        """同步渲染；CPU 密集，调用方应放入线程执行，避免阻塞事件循环。"""
+        self._styles = _make_styles()
+        warnings: list[str] = []
+
+        page = _PAGE_SIZES.get((options.page_size or "A4").lower(), A4)
+        buf = BytesIO()
+        doc = SimpleDocTemplate(
+            buf,
+            pagesize=page,
+            leftMargin=20 * mm,
+            rightMargin=20 * mm,
+            topMargin=18 * mm,
+            bottomMargin=18 * mm,
+            title=str(document.attributes.get("title") or "") or None,
+        )
+
+        story: list = []
+        self._render_header(document, options, story)
+        self._render_children(document.children, story, warnings)
+
+        doc.build(story)
+        return ExportResult(content=buf.getvalue(), mime_type=_MIME, warnings=warnings)
+
+    async def export(self, document: Document, options: ExportOptions) -> ExportResult:
+        """契约要求的 async 接口；渲染本身同步，直接转发到 render。"""
+        return self.render(document, options)
+
+    # --- 文档头部 ---
+    def _render_header(self, document: Document, options: ExportOptions, story: list) -> None:
+        title = str(document.attributes.get("title") or "")
+        if options.include_title and title:
+            story.append(Paragraph(_html.escape(title), self._styles["title"]))
+        if options.include_metadata:
+            metadata = document.attributes.get("metadata")
+            if metadata:
+                for key, value in metadata.items():
+                    text = f"{_html.escape(str(key))}: {_html.escape(format_meta_value(value))}"
+                    story.append(Paragraph(text, self._styles["meta"]))
+
+    # --- 块级 ---
+    def _render_children(self, children: list[DocumentNode], story: list, warnings: list[str]) -> None:
+        for child in children:
+            self._render_block(child, story, warnings)
+
+    def _render_block(self, node: DocumentNode, story: list, warnings: list[str]) -> None:
+        handler = getattr(self, f"_block_{node.type}", None)
+        if handler is not None:
+            handler(node, story, warnings)
+        else:
+            warnings.append(f"无法表示的节点类型已跳过：{node.type}")
+
+    def _block_heading(self, node: DocumentNode, story: list, warnings: list[str]) -> None:
+        level = max(1, min(6, int(node.attributes.get("level", 1))))
+        inline = self._render_inline(node.children, warnings)
+        story.append(Paragraph(inline, self._styles[f"h{level}"]))
+
+    def _block_paragraph(self, node: DocumentNode, story: list, warnings: list[str]) -> None:
+        story.append(Paragraph(self._render_inline(node.children, warnings), self._styles["body"]))
+
+    def _block_blockquote(self, node: DocumentNode, story: list, warnings: list[str]) -> None:
+        # 引用块的直接子节点是块级节点（paragraph/list 等），不能交给行内渲染器，
+        # 否则正文会被当作「无法表示的行内节点」丢弃；逐个渲染并继承引用缩进/颜色。
+        for child in node.children:
+            if child.type == "paragraph":
+                story.append(
+                    Paragraph(self._render_inline(child.children, warnings), self._styles["quote"])
+                )
+            elif child.type == "list":
+                self._block_list(child, story, warnings, indent=14, color=_QUOTE_COLOR)
+            else:
+                self._render_block(child, story, warnings)
+
+    def _block_list(
+        self,
+        node: DocumentNode,
+        story: list,
+        warnings: list[str],
+        indent: int = 14,
+        color: str | None = None,
+    ) -> None:
+        ordered = bool(node.attributes.get("ordered"))
+        for index, item in enumerate(node.children, start=1):
+            self._block_list_item(item, story, warnings, ordered, index, indent, color)
+
+    def _block_list_item(
+        self,
+        item: DocumentNode,
+        story: list,
+        warnings: list[str],
+        ordered: bool,
+        index: int,
+        indent: int,
+        color: str | None = None,
+    ) -> None:
+        if item.attributes.get("task"):
+            marker = "☑ " if item.attributes.get("checked") else "☐ "
+        else:
+            marker = f"{index}. " if ordered else "• "
+        style_kwargs: dict = dict(
+            parent=self._styles["body"],
+            leftIndent=indent,
+            firstLineIndent=-7,
+            spaceAfter=2,
+        )
+        if color:
+            style_kwargs["textColor"] = color
+        style = ParagraphStyle(f"pdf-li-{indent}-{color or 'normal'}", **style_kwargs)
+        # 先收集父级正文、后处理嵌套列表：保证「父级文字在前、子列表在后」的阅读顺序，
+        # 而不是在循环里遇到嵌套列表就立刻递归输出（那会把子列表排到父级前面）。
+        parts: list[str] = []
+        nested: list[DocumentNode] = []
+        for child in item.children:
+            if child.type == "list":
+                nested.append(child)
+            elif child.type == "paragraph":
+                parts.append(self._render_inline(child.children, warnings))
+            elif child.children:
+                parts.append(self._render_inline(child.children, warnings))
+            else:
+                parts.append(_html.escape(child.text))
+        story.append(Paragraph(marker + "<br/>".join(parts), style))
+        for child_list in nested:
+            self._block_list(child_list, story, warnings, indent + 14, color)
+
+    def _block_table(self, node: DocumentNode, story: list, warnings: list[str]) -> None:
+        rows = node.children
+        if not rows:
+            return
+        data: list[list[Paragraph]] = []
+        head_row_count = 0
+        for row in rows:
+            head = bool(row.attributes.get("head"))
+            if head:
+                head_row_count += 1
+            cells = [
+                Paragraph(
+                    self._render_inline(cell.children, warnings),
+                    self._styles["cell_head" if cell.attributes.get("head") else "cell"],
+                )
+                for cell in row.children
+            ]
+            data.append(cells)
+        table = Table(data, repeatRows=head_row_count)
+        commands = [
+            ("GRID", (0, 0), (-1, -1), 0.5, "#d0d7de"),
+            ("VALIGN", (0, 0), (-1, -1), "TOP"),
+            ("LEFTPADDING", (0, 0), (-1, -1), 6),
+            ("RIGHTPADDING", (0, 0), (-1, -1), 6),
+            ("TOPPADDING", (0, 0), (-1, -1), 4),
+            ("BOTTOMPADDING", (0, 0), (-1, -1), 4),
+        ]
+        if head_row_count:
+            commands.append(("BACKGROUND", (0, 0), (-1, head_row_count - 1), "#f6f8fa"))
+        table.setStyle(TableStyle(commands))
+        story.append(table)
+
+    def _block_code_block(self, node: DocumentNode, story: list, warnings: list[str]) -> None:
+        story.append(Preformatted(node.text, self._styles["code"]))
+
+    def _block_thematic_break(self, node: DocumentNode, story: list, warnings: list[str]) -> None:
+        story.append(Spacer(1, 4))
+        story.append(HRFlowable(width="100%", color="#d0d7de", thickness=0.5))
+        story.append(Spacer(1, 6))
+
+    def _block_mermaid(self, node: DocumentNode, story: list, warnings: list[str]) -> None:
+        warnings.append(MERMAID_WARNING)
+        story.append(Preformatted(node.text, self._styles["code"]))
+
+    def _block_function_plot(self, node: DocumentNode, story: list, warnings: list[str]) -> None:
+        warnings.append(PLOT_PLACEHOLDER_WARNING)
+        story.append(Preformatted(node.text, self._styles["code"]))
+
+    def _block_math_block(self, node: DocumentNode, story: list, warnings: list[str]) -> None:
+        story.append(Paragraph(f"$${_html.escape(node.text)}$$", self._styles["math"]))
+
+    def _block_html_block(self, node: DocumentNode, story: list, warnings: list[str]) -> None:
+        # 原始 HTML 不可信，按纯文本保留正文
+        warnings.append(RAW_HTML_WARNING)
+        story.append(Paragraph(_html.escape(node.text), self._styles["body"]))
+
+    # --- 行内（产出 reportlab Paragraph 标记文本） ---
+    def _render_inline(self, children: list[DocumentNode], warnings: list[str]) -> str:
+        return "".join(self._render_inline_node(child, warnings) for child in children)
+
+    def _render_inline_node(self, node: DocumentNode, warnings: list[str]) -> str:
+        t = node.type
+        if t == "text":
+            return _html.escape(node.text)
+        if t in ("strong", "emphasis"):
+            return self._render_inline(node.children, warnings)
+        if t == "codespan":
+            return f'<font size="9">{_html.escape(node.text)}</font>'
+        if t == "link":
+            inner = self._render_inline(node.children, warnings)
+            href = str(node.attributes.get("href") or "")
+            safe_href = safe_url(href)
+            if safe_href is None:
+                warnings.append(f"链接协议不安全，已降级为纯文本：{href!r}")
+                return inner
+            return f'<a href="{_html.escape(safe_href)}">{inner}</a>'
+        if t == "image":
+            src = str(node.attributes.get("src") or "")
+            alt = str(node.attributes.get("alt") or "")
+            if safe_url(src) is None:
+                warnings.append(f"图片地址不安全，已跳过：{src!r}")
+            else:
+                warnings.append("图片未内嵌到 PDF，已用替代文本表示")
+            return _html.escape(alt) if alt else ""
+        if t == "math_inline":
+            return f"\\({_html.escape(node.text)}\\)"
+        if t == "linebreak":
+            return "<br/>"
+        warnings.append(f"无法表示的行内节点已跳过：{t}")
+        return ""

backend/app/export/markdown.py

@@ -0,0 +1,229 @@
+"""Markdown → Document AST：用 mistune 的 ast renderer 产出通用 token，再映射为内部节点。
+
+选用 mistune 内置 'ast' renderer 而非自写 BaseRenderer，是因为 mistune 的行内渲染按
+字符串拼接、无法承载结构化子节点；ast renderer 直接给出带 children/attrs/raw 的 token
+树，映射层只做 token → DocumentNode 的搬运，不掺入任何 HTML。
+"""
+
+from __future__ import annotations
+
+import mistune
+
+from app.export.document import Document, DocumentNode
+
+_PLUGINS = ["table", "math", "url", "task_lists"]
+
+# fenced code 语言分流：命中则转为专用节点，其余按普通代码块
+_MERMAID_LANG = "mermaid"
+_FUNCTION_PLOT_LANGS = {"function-plot", "function_plot", "functionplot"}
+
+
+def parse_document(markdown: str) -> Document:
+    """把 Markdown 文本解析为 Document AST 根节点。"""
+    renderer = mistune.create_markdown(renderer="ast", plugins=_PLUGINS)
+    tokens = renderer(markdown)
+    mapper = _AstMapper()
+    return Document(node_id=mapper.next_id(), children=mapper.map_blocks(tokens))
+
+
+class _AstMapper:
+    """token 树 → DocumentNode 树的映射器；node_id 按遍历顺序递增，无需跨请求稳定。"""
+
+    def __init__(self) -> None:
+        self._seq = 0
+
+    def next_id(self) -> str:
+        self._seq += 1
+        return f"node_{self._seq:03d}"
+
+    def map_blocks(self, tokens: list[dict]) -> list[DocumentNode]:
+        nodes: list[DocumentNode] = []
+        for token in tokens:
+            node = self.map_block(token)
+            if node is not None:
+                nodes.append(node)
+        return nodes
+
+    def map_block(self, token: dict) -> DocumentNode | None:
+        kind = token["type"]
+        if kind == "heading":
+            return DocumentNode(
+                type="heading",
+                node_id=self.next_id(),
+                attributes={"level": token["attrs"]["level"]},
+                children=self.map_inline(token.get("children", [])),
+            )
+        if kind in ("paragraph", "block_text"):
+            # block_text 是列表项内的段落块，仍按 paragraph 表达，由 list_item 包裹
+            return DocumentNode(
+                type="paragraph",
+                node_id=self.next_id(),
+                children=self.map_inline(token.get("children", [])),
+            )
+        if kind == "list":
+            return DocumentNode(
+                type="list",
+                node_id=self.next_id(),
+                attributes={"ordered": bool(token.get("attrs", {}).get("ordered"))},
+                children=[self.map_list_item(child) for child in token.get("children", [])],
+            )
+        if kind == "block_code":
+            return self._map_code(token)
+        if kind == "block_quote":
+            return DocumentNode(
+                type="blockquote",
+                node_id=self.next_id(),
+                children=self.map_blocks(token.get("children", [])),
+            )
+        if kind == "table":
+            return self._map_table(token)
+        if kind == "block_math":
+            return DocumentNode(
+                type="math_block", node_id=self.next_id(), text=token.get("raw", "")
+            )
+        if kind == "thematic_break":
+            return DocumentNode(type="thematic_break", node_id=self.next_id())
+        if kind == "blank_line":
+            return None
+        if kind == "block_html":
+            # 原始 HTML 块降级为纯文本节点，由 HtmlExporter 转义并记 warning，避免静默丢失正文
+            return DocumentNode(
+                type="html_block", node_id=self.next_id(), text=token.get("raw", "")
+            )
+        # 未知块级 token 保守保留原文；映射为带 text 子节点的 paragraph，避免被渲染层丢弃
+        raw = token.get("raw", "")
+        if raw:
+            return DocumentNode(
+                type="paragraph",
+                node_id=self.next_id(),
+                children=[DocumentNode(type="text", node_id=self.next_id(), text=raw)],
+            )
+        return None
+
+    def map_list_item(self, token: dict) -> DocumentNode:
+        """列表项：block_text 展平为行内子节点，嵌套 list 保留为子节点。"""
+        attributes: dict = {}
+        if token["type"] == "task_list_item":
+            attributes = {"task": True, "checked": bool(token.get("attrs", {}).get("checked"))}
+        children: list[DocumentNode] = []
+        for child in token.get("children", []):
+            if child["type"] == "block_text":
+                children.extend(self.map_inline(child.get("children", [])))
+            elif child["type"] == "list":
+                children.append(self.map_block(child))
+            else:
+                node = self.map_block(child)
+                if node is not None:
+                    children.append(node)
+        return DocumentNode(
+            type="list_item", node_id=self.next_id(), attributes=attributes, children=children
+        )
+
+    def map_inline(self, tokens: list[dict]) -> list[DocumentNode]:
+        nodes: list[DocumentNode] = []
+        for token in tokens:
+            node = self.map_inline_token(token)
+            if node is not None:
+                nodes.append(node)
+        return nodes
+
+    def map_inline_token(self, token: dict) -> DocumentNode | None:
+        kind = token["type"]
+        if kind == "text":
+            return DocumentNode(type="text", node_id=self.next_id(), text=token.get("raw", ""))
+        if kind == "strong":
+            return DocumentNode(
+                type="strong", node_id=self.next_id(),
+                children=self.map_inline(token.get("children", [])),
+            )
+        if kind == "emphasis":
+            return DocumentNode(
+                type="emphasis", node_id=self.next_id(),
+                children=self.map_inline(token.get("children", [])),
+            )
+        if kind == "link":
+            attrs = token.get("attrs", {})
+            attributes = {"href": attrs.get("url", "")}
+            if attrs.get("title"):
+                attributes["title"] = attrs["title"]
+            return DocumentNode(
+                type="link", node_id=self.next_id(), attributes=attributes,
+                children=self.map_inline(token.get("children", [])),
+            )
+        if kind == "codespan":
+            return DocumentNode(type="codespan", node_id=self.next_id(), text=token.get("raw", ""))
+        if kind == "image":
+            # mistune 图片 token：src 在 attrs.url，alt 来自 children 的文本，title 在 attrs.title
+            attrs = token.get("attrs", {})
+            alt = "".join(
+                child.get("raw", "")
+                for child in token.get("children", [])
+                if child.get("type") == "text"
+            )
+            attributes = {"src": attrs.get("url", "")}
+            if alt:
+                attributes["alt"] = alt
+            if attrs.get("title"):
+                attributes["title"] = attrs["title"]
+            return DocumentNode(type="image", node_id=self.next_id(), attributes=attributes)
+        if kind == "inline_math":
+            return DocumentNode(
+                type="math_inline", node_id=self.next_id(), text=token.get("raw", "")
+            )
+        if kind == "softbreak":
+            # HTML 中换行会折叠为空白，软换行按空格表达
+            return DocumentNode(type="text", node_id=self.next_id(), text=" ")
+        if kind == "linebreak":
+            return DocumentNode(type="linebreak", node_id=self.next_id())
+        # 未知行内 token 保守保留原文
+        raw = token.get("raw", "")
+        if raw:
+            return DocumentNode(type="text", node_id=self.next_id(), text=raw)
+        return None
+
+    def _map_code(self, token: dict) -> DocumentNode:
+        info = (token.get("attrs", {}).get("info") or "").strip()
+        lang = info.split()[0].lower() if info else ""
+        code = token.get("raw", "").rstrip("\n")
+        if lang == _MERMAID_LANG:
+            return DocumentNode(type="mermaid", node_id=self.next_id(), text=code)
+        if lang in _FUNCTION_PLOT_LANGS:
+            return DocumentNode(type="function_plot", node_id=self.next_id(), text=code)
+        attributes = {"language": lang} if lang else {}
+        return DocumentNode(
+            type="code_block", node_id=self.next_id(), attributes=attributes, text=code
+        )
+
+    def _map_table(self, token: dict) -> DocumentNode:
+        rows: list[DocumentNode] = []
+        for child in token.get("children", []):
+            if child["type"] == "table_head":
+                rows.append(self._map_table_row(child, head=True))
+            elif child["type"] == "table_body":
+                for row in child.get("children", []):
+                    if row["type"] == "table_row":
+                        rows.append(self._map_table_row(row, head=False))
+            elif child["type"] == "table_row":
+                rows.append(self._map_table_row(child, head=False))
+        return DocumentNode(type="table", node_id=self.next_id(), children=rows)
+
+    def _map_table_row(self, token: dict, *, head: bool) -> DocumentNode:
+        cells: list[DocumentNode] = []
+        for cell in token.get("children", []):
+            if cell["type"] != "table_cell":
+                continue
+            attrs = cell.get("attrs", {})
+            cell_attributes = {"head": bool(attrs.get("head", head))}
+            if attrs.get("align"):
+                cell_attributes["align"] = attrs["align"]
+            cells.append(
+                DocumentNode(
+                    type="table_cell",
+                    node_id=self.next_id(),
+                    attributes=cell_attributes,
+                    children=self.map_inline(cell.get("children", [])),
+                )
+            )
+        return DocumentNode(
+            type="table_row", node_id=self.next_id(), attributes={"head": head}, children=cells
+        )

backend/app/export/service.py

@@ -0,0 +1,391 @@
+"""Export 服务：任务注册表、后台渲染、取消与产物生命周期。
+
+与 Benchmark 一致采用「创建即返回 queued、后台 Task 异步执行」的内存模型：任务与产物
+暂存内存与 exports 目录，不持久化到 SQLite。导出是单阶段渲染，无 SSE 事件流，取消主要
+在渲染前/后让出执行权的边界生效；产物带 24h 过期时间，过期后不可下载。
+"""
+
+from __future__ import annotations
+
+import asyncio
+import hashlib
+import logging
+import re
+from datetime import datetime, timedelta, timezone
+from pathlib import Path
+from uuid import uuid4
+
+from app.config import get_settings
+from app.contracts import (
+    ExportFile,
+    ExportFormat,
+    ExportJob,
+    ExportOptions,
+    ExportProgress,
+    ExportRequest,
+    ExportSource,
+    ExportSourceType,
+    ExportStatus,
+)
+from app.errors import ApiError
+from app.export.document import Document, ExportResult
+from app.export.exporters.docx import DocxExporter
+from app.export.exporters.html import HtmlExporter
+from app.export.exporters.pdf import PdfExporter
+from app.export.markdown import parse_document
+from app.services import note_service
+
+logger = logging.getLogger(__name__)
+
+_jobs: dict[str, ExportJob] = {}
+_tasks: dict[str, asyncio.Task] = {}
+_cancel_flags: dict[str, asyncio.Event] = {}
+MAX_JOBS = 100
+# 输入源（note / markdown）统一大小上限，防止未保存预览或超长笔记塞爆内存/产物
+MAX_MARKDOWN_CHARS = 200_000
+# 最终导出产物大小上限，防止超大 HTML 耗尽内存/磁盘
+MAX_EXPORT_BYTES = 20 * 1024 * 1024  # 20 MB
+# 并发渲染上限：解析/渲染是 CPU 密集的同步工作，限制同时执行的任务数，
+# 防止大量任务同时占满工作线程与内存
+MAX_CONCURRENT_RENDERS = 2
+_render_slots = asyncio.Semaphore(MAX_CONCURRENT_RENDERS)
+# 产物有效期
+FILE_TTL = timedelta(hours=24)
+
+_INVALID_FILE_CHARS = re.compile(r'[\\/:*?"<>|]')
+
+# 格式 → 导出器；新增格式只需在此登记，路由与任务模型无需改动
+_EXPORTERS: dict[ExportFormat, type] = {
+    ExportFormat.html: HtmlExporter,
+    ExportFormat.pdf: PdfExporter,
+    ExportFormat.docx: DocxExporter,
+}
+
+# 格式 → 文件扩展名（用于落盘文件名与产物清理）
+_EXTENSIONS: dict[ExportFormat, str] = {
+    ExportFormat.html: ".html",
+    ExportFormat.pdf: ".pdf",
+    ExportFormat.docx: ".docx",
+}
+
+
+def _extension_for(format: ExportFormat) -> str:
+    return _EXTENSIONS[format]
+
+
+class ExportCancelled(Exception):
+    """导出在渲染前被取消时抛出，用于标记 cancelled。"""
+
+
+class ExportTooLarge(Exception):
+    """导出产物超过大小上限时抛出，用于标记 failed 并携带专用错误码。"""
+
+
+def _now() -> datetime:
+    return datetime.now(timezone.utc)
+
+
+def _safe_download_name(title: str) -> str:
+    """清洗标题得到安全的下载文件名；空标题回退到 export。"""
+    name = _INVALID_FILE_CHARS.sub("_", title).strip() or "export"
+    return name[:80]
+
+
+def _export_path(job_id: str, ext: str) -> Path:
+    return get_settings().exports_path / f"{job_id}{ext}"
+
+
+def _delete_file(job_id: str, ext: str) -> None:
+    """删除导出产物文件；文件不存在时忽略。"""
+    try:
+        _export_path(job_id, ext).unlink(missing_ok=True)
+    except OSError:
+        logger.warning("Failed to delete export file: %s", job_id)
+
+
+def cleanup_orphan_files() -> int:
+    """清理 exports 目录下无对应内存任务的孤立产物（服务重启后调用）。"""
+    exports_dir = get_settings().exports_path
+    if not exports_dir.is_dir():
+        return 0
+    removed = 0
+    for ext in _EXTENSIONS.values():
+        for path in exports_dir.glob(f"*{ext}"):
+            if path.stem not in _jobs:
+                try:
+                    path.unlink()
+                    removed += 1
+                except OSError:
+                    logger.warning("Failed to delete orphan export file: %s", path)
+    return removed
+
+
+def _render_document(document: Document, options: ExportOptions, format: ExportFormat) -> ExportResult:
+    """按 format 分发到对应导出器；每次新建实例避免跨线程复用。"""
+    exporter_cls = _EXPORTERS[format]
+    return exporter_cls().render(document, options)
+
+
+def _forget(job_id: str) -> None:
+    job = _jobs.get(job_id)
+    ext = _extension_for(job.format) if job is not None else ".html"
+    _jobs.pop(job_id, None)
+    _tasks.pop(job_id, None)
+    _cancel_flags.pop(job_id, None)
+    _delete_file(job_id, ext)
+
+
+def _evict_terminal() -> bool:
+    """超过容量时淘汰最旧的终态任务；全为活动任务无法淘汰时返回 False。"""
+    terminal = (ExportStatus.completed, ExportStatus.failed, ExportStatus.cancelled)
+    while len(_jobs) >= MAX_JOBS:
+        victim = next((jid for jid, job in _jobs.items() if job.status in terminal), None)
+        if victim is None:
+            return False
+        _forget(victim)
+    return True
+
+
+async def _resolve_source(source: ExportSource) -> tuple[str, str, dict | None]:
+    """把导出源解析为 (markdown, title, metadata)；metadata 仅 note 源提供。"""
+    if source.type == ExportSourceType.note:
+        note = await note_service.get_note(source.note_id)
+        if note is None:
+            raise ApiError(
+                404,
+                "EXPORT_SOURCE_NOT_FOUND",
+                "note not found",
+                {"note_id": source.note_id},
+            )
+        if len(note.markdown) > MAX_MARKDOWN_CHARS:
+            raise ApiError(
+                400,
+                "EXPORT_OPTIONS_INVALID",
+                f"note source exceeds {MAX_MARKDOWN_CHARS} characters",
+                {"size": len(note.markdown), "limit": MAX_MARKDOWN_CHARS},
+            )
+        metadata = {
+            "file_path": note.file_path,
+            "tags": note.tags,
+            "created_at": note.created_at,
+            "updated_at": note.updated_at,
+        }
+        return note.markdown, note.title, metadata
+
+    markdown = source.markdown or ""
+    if not markdown.strip():
+        raise ApiError(400, "EXPORT_OPTIONS_INVALID", "markdown source must not be empty")
+    if len(markdown) > MAX_MARKDOWN_CHARS:
+        raise ApiError(
+            400,
+            "EXPORT_OPTIONS_INVALID",
+            f"markdown source exceeds {MAX_MARKDOWN_CHARS} characters",
+            {"size": len(markdown), "limit": MAX_MARKDOWN_CHARS},
+        )
+    return markdown, "", None
+
+
+async def create_export(request: ExportRequest) -> ExportJob:
+    """创建导出任务，立即返回 queued 的 ExportJob，由后台 Task 渲染。"""
+    markdown, title, metadata = await _resolve_source(request.source)
+
+    if not _evict_terminal():
+        raise ApiError(
+            429,
+            "EXPORT_CAPACITY_EXCEEDED",
+            "Export capacity exceeded; wait for active jobs to finish.",
+            {},
+        )
+
+    job_id = "export_" + uuid4().hex[:12]
+    job = ExportJob(
+        job_id=job_id,
+        status=ExportStatus.queued,
+        format=request.format,
+        created_at=_now(),
+    )
+    _jobs[job_id] = job
+    _cancel_flags[job_id] = asyncio.Event()
+    _tasks[job_id] = asyncio.create_task(
+        _execute(job_id, request.format, markdown, title, metadata, request.options)
+    )
+    return job
+
+
+async def _acquire_render_slot(cancel_event: asyncio.Event) -> bool:
+    """等待渲染槽位，同时响应取消：拿到槽位返回 True，被取消返回 False。
+
+    等待期间任务保持 queued；取消即时生效，不必等前面的渲染完成。
+    """
+    while True:
+        if cancel_event.is_set():
+            return False
+        acquire = asyncio.create_task(_render_slots.acquire())
+        cancel_wait = asyncio.create_task(cancel_event.wait())
+        done, pending = await asyncio.wait(
+            (acquire, cancel_wait), return_when=asyncio.FIRST_COMPLETED
+        )
+        if acquire in done:
+            # 拿到槽位；收掉仍在等待取消标志的任务（不释放刚拿到的槽位）
+            for task in pending:
+                task.cancel()
+            await asyncio.gather(*pending, return_exceptions=True)
+            return True
+        # 取消先到：取消尚未完成的 acquire（Semaphore.acquire 取消不会递减计数）
+        acquire.cancel()
+        cancel_wait.cancel()
+        await asyncio.gather(acquire, cancel_wait, return_exceptions=True)
+        return False
+
+
+async def _execute(
+    job_id: str,
+    format: ExportFormat,
+    markdown: str,
+    title: str,
+    metadata: dict | None,
+    options: ExportOptions,
+) -> None:
+    """后台渲染：排队 → 解析 → 导出 → 写文件 → 挂载产物元信息。"""
+    cancel_event = _cancel_flags[job_id]
+    acquired = False
+    try:
+        # 并发渲染限额：解析/渲染是 CPU 密集的同步工作，用信号量限制同时执行的任务数。
+        # 等待槽位期间保持 queued 并同时监听取消，取消即时生效，不必等前面的渲染完成。
+        if not await _acquire_render_slot(cancel_event):
+            raise ExportCancelled()
+        acquired = True
+
+        # 拿到槽位后才进入 running
+        _jobs[job_id] = _jobs[job_id].model_copy(
+            update={
+                "status": ExportStatus.running,
+                "started_at": _now(),
+                "progress": ExportProgress(phase="rendering", current=0, total=1, percent=0.0),
+            }
+        )
+        # 让出一次，使「创建后立即取消」的 queued 任务能及时进入 cancelled
+        await asyncio.sleep(0)
+        if cancel_event.is_set():
+            raise ExportCancelled()
+
+        # 解析与渲染都是 CPU 密集的同步工作，放入线程执行避免阻塞事件循环，
+        # 使运行中的取消能在渲染边界生效；写文件前再次检查取消。
+        document = await asyncio.to_thread(parse_document, markdown)
+        document.attributes["title"] = title
+        if metadata:
+            document.attributes["metadata"] = metadata
+
+        result = await asyncio.to_thread(_render_document, document, options, format)
+        if cancel_event.is_set():
+            raise ExportCancelled()
+        if len(result.content) > MAX_EXPORT_BYTES:
+            raise ExportTooLarge()
+
+        ext = _extension_for(format)
+        out_dir = get_settings().exports_path
+        out_dir.mkdir(parents=True, exist_ok=True)
+        path = _export_path(job_id, ext)
+        path.write_bytes(result.content)
+
+        completed_at = _now()
+        _jobs[job_id] = _jobs[job_id].model_copy(
+            update={
+                "status": ExportStatus.completed,
+                "progress": ExportProgress(
+                    phase="completed", current=1, total=1, percent=1.0
+                ),
+                "file": ExportFile(
+                    file_name=f"{_safe_download_name(title)}{ext}",
+                    mime_type=result.mime_type,
+                    size=len(result.content),
+                    sha256=hashlib.sha256(result.content).hexdigest(),
+                    expires_at=completed_at + FILE_TTL,
+                ),
+                "warnings": result.warnings,
+                "completed_at": completed_at,
+            }
+        )
+    except ExportCancelled:
+        _jobs[job_id] = _jobs[job_id].model_copy(
+            update={
+                "status": ExportStatus.cancelled,
+                "completed_at": _now(),
+            }
+        )
+    except ExportTooLarge:
+        _jobs[job_id] = _jobs[job_id].model_copy(
+            update={
+                "status": ExportStatus.failed,
+                "error": "Export output exceeds size limit.",
+                "error_code": "EXPORT_OUTPUT_TOO_LARGE",
+                "completed_at": _now(),
+            }
+        )
+    except Exception as exc:  # 渲染失败不拖垮服务，只记日志与项目错误码
+        logger.exception("Export failed: job_id=%s", job_id)
+        _jobs[job_id] = _jobs[job_id].model_copy(
+            update={
+                "status": ExportStatus.failed,
+                "error": "Export render failed.",
+                "error_code": "EXPORT_RENDER_FAILED",
+                "completed_at": _now(),
+            }
+        )
+    finally:
+        if acquired:
+            _render_slots.release()
+        _cancel_flags.pop(job_id, None)
+
+
+def list_exports(
+    status: ExportStatus | None = None,
+    format: ExportFormat | None = None,
+    limit: int = 50,
+    offset: int = 0,
+) -> tuple[list[ExportJob], int]:
+    jobs = list(_jobs.values())
+    if status is not None:
+        jobs = [j for j in jobs if j.status == status]
+    if format is not None:
+        jobs = [j for j in jobs if j.format == format]
+    jobs.sort(key=lambda j: j.created_at, reverse=True)
+    total = len(jobs)
+    return jobs[offset : offset + limit], total
+
+
+def get_export(job_id: str) -> ExportJob | None:
+    return _jobs.get(job_id)
+
+
+def cancel_export(job_id: str) -> ExportJob | None:
+    """取消导出：仅 queued/running 可取消，后台 Task 在让出边界标记 cancelled。"""
+    job = _jobs.get(job_id)
+    if job is None:
+        return None
+    if job.status in (ExportStatus.queued, ExportStatus.running):
+        _cancel_flags[job_id].set()
+    return job
+
+
+def get_export_file(job_id: str) -> Path:
+    """返回可下载产物的存储路径；未完成返回 404、过期返回 410。"""
+    job = _jobs.get(job_id)
+    if job is None:
+        raise ApiError(404, "EXPORT_JOB_NOT_FOUND", "export job not found", {"job_id": job_id})
+    if job.status != ExportStatus.completed or job.file is None:
+        raise ApiError(
+            404, "EXPORT_JOB_NOT_FOUND", "export file not ready", {"job_id": job_id}
+        )
+    if job.file.expires_at <= _now():
+        _forget(job_id)  # 过期即清理内存记录与产物文件
+        raise ApiError(410, "EXPORT_FILE_EXPIRED", "export file has expired", {"job_id": job_id})
+    return _export_path(job_id, _extension_for(job.format))
+
+
+async def wait_for_export(job_id: str) -> ExportJob | None:
+    """等待后台任务结束（测试/轮询用）；无任务时直接返回当前状态。"""
+    task = _tasks.get(job_id)
+    if task is not None:
+        await task
+    return _jobs.get(job_id)

backend/app/local_models/protocol.py

@@ -0,0 +1,11 @@
+"""Bound embedding result frames so large notes do not exceed pipe line limits."""
+import json
+
+
+def response_lines(response, operation):
+    if operation == 'embedding' and 'result' in response and 'error_code' not in response:
+        vectors = response['result']
+        for offset in range(0, len(vectors), 128):
+            yield json.dumps({'embedding_offset': offset, 'embedding_chunk': vectors[offset:offset + 128]}, allow_nan=False) + '\n'
+        response = {**response, 'result': [], 'embedding_count': len(vectors)}
+    yield json.dumps(response, ensure_ascii=False, allow_nan=False) + '\n'

backend/app/local_models/runtime.py

@@ -189,15 +189,30 @@ class Runtime:
                 await process.stdin.drain()
                 process.stdin.close()
                 final = None
+                vectors = []
                 while line := await process.stdout.readline():
                     message = json.loads(line)
-                    if "progress" in message:
+                    if "embedding_chunk" in message:
+                        chunk = message['embedding_chunk']
+                        if (operation != 'embedding' or not isinstance(chunk, list)
+                                or message.get('embedding_offset') != len(vectors)
+                                or len(vectors) + len(chunk) > len(payload.get('texts', []))):
+                            raise ProviderError('LOCAL_MODEL_INVALID_RESPONSE', '本地向量传输顺序或数量无效。')
+                        vectors.extend(chunk)
+                    elif "progress" in message:
                         callback = runtime_progress.get()
                         if callback:
                             callback(message)
                     else:
                         final = message
                 await process.wait()
+                if isinstance(final, dict) and 'embedding_count' in final:
+                    if (final['embedding_count'] != len(vectors)
+                            or len(vectors) != len(payload.get('texts', []))):
+                        raise ProviderError('LOCAL_MODEL_INVALID_RESPONSE', '本地向量传输不完整。')
+                    final['result'] = vectors
+                elif vectors:
+                    raise ProviderError('LOCAL_MODEL_INVALID_RESPONSE', '本地向量传输缺少结束标记。')
                 return final
             try:
                 result = await asyncio.wait_for(receive(), config.timeout_seconds)

backend/app/local_models/worker.py

@@ -216,4 +216,6 @@ if __name__ == "__main__":
                 response = {"error_code": "LOCAL_INFERENCE_FAILED", "message": "本地推理失败，请检查媒体格式、模型和设备配置。"}
     if "error_code" in response:
         response["diagnostics"] = {"requested_device": request["config"]["device"], "actual_device": request.get("_actual_device", "unknown")}
-    sys.stdout.buffer.write((json.dumps(response, ensure_ascii=False, allow_nan=False) + "\n").encode("utf-8"))
+    from protocol import response_lines
+    for line in response_lines(response, request['operation']):
+        sys.stdout.buffer.write(line.encode('utf-8'))

backend/app/log_routes.py

@@ -0,0 +1,11 @@
+from fastapi import APIRouter, Query
+from app.operation_logs import get_store
+
+router = APIRouter(prefix='/api/logs', tags=['Diagnostics'])
+
+
+@router.get('')
+def list_logs(limit: int = Query(50, ge=1, le=200), before: int | None = Query(None, ge=1),
+              level: str = Query('', pattern='^(|INFO|WARNING|ERROR|CRITICAL)$'),
+              source: str = Query('', max_length=100), q: str = Query('', max_length=200)):
+    return get_store().query(limit=limit, before=before, level=level, source=source, q=q)

backend/app/main.py

@@ -1,4 +1,7 @@
 from contextlib import asynccontextmanager
+import asyncio
+from time import perf_counter
+from uuid import uuid4
 
 from fastapi import FastAPI
 from fastapi.exceptions import RequestValidationError
@@ -8,23 +11,31 @@ from starlette.exceptions import HTTPException as StarletteHttpException
 from app.config import get_settings
 from app.container import container
 from app.errors import ApiError, api_error_handler, http_error_handler, validation_error_handler
+from app.export import service as export_service
 from app.routes import router as api_router
 from app.media_routes import router as media_router
 from app.local_model_routes import router as local_model_router
 from app.usage_routes import router as usage_router
 from app.provider_preview_routes import router as provider_preview_router
 from app.schemas import HealthResponse, ServiceStatusResponse
+from app.log_routes import router as log_router
+from app.operation_logs import install_logging, log_event, request_id, shutdown_logging
 
 settings = get_settings()
 
 
 @asynccontextmanager
 async def lifespan(_: FastAPI):
+    install_logging()
+    log_event('system', 'service.started')
+    # 重启后内存注册表为空，清理上一次运行遗留的导出产物，避免磁盘垃圾堆积。
+    export_service.cleanup_orphan_files()
     from app.services import transcription_service
     transcription_service.recover_interrupted()
     try:
         yield
     finally:
+        await container.agent.shutdown()
         from app.services import index_service
         await index_service.shutdown()
         await transcription_service.shutdown()
@@ -33,8 +44,11 @@ async def lifespan(_: FastAPI):
         from app.local_models import manager
         for _, key in list(manager._downloads):
             await manager.cancel_download(key)
+        # 第三方 MCP Server 必须跟随 AI Core 退出，不能遗留孤儿进程。
         container.plugins.shutdown()
         container.mcp_servers.shutdown()
+        log_event('system', 'service.stopped')
+        await asyncio.to_thread(shutdown_logging)
 
 
 app = FastAPI(
@@ -60,6 +74,32 @@ app.include_router(media_router)
 app.include_router(local_model_router)
 app.include_router(usage_router)
 app.include_router(provider_preview_router)
+app.include_router(log_router)
+
+
+@app.middleware('http')
+async def operation_log(request, call_next):
+    token = request_id.set(uuid4().hex)
+    started = perf_counter()
+    status = 500
+    failure = None
+    try:
+        response = await call_next(request)
+        status = response.status_code
+        response.headers['X-Request-ID'] = request_id.get()
+        return response
+    except Exception as exc:
+        failure = exc
+        raise
+    finally:
+        # Do not record query strings, request/response bodies or arbitrary URLs.
+        route = getattr(request.scope.get('route'), 'path', 'unmatched')
+        if not route.startswith('/api/logs') and (request.method not in {'GET', 'HEAD', 'OPTIONS'} or status >= 400 or perf_counter() - started > 1):
+            log_event('http', 'request.finished', level='ERROR' if status >= 500 else 'WARNING' if status >= 400 else 'INFO',
+                      error=failure, method=request.method, route=route, status=status,
+                      duration_ms=round((perf_counter() - started) * 1000, 2),
+                      **{k: v for k, v in request.path_params.items() if k in {'run_id', 'task_id', 'note_id', 'job_id', 'provider_id'}})
+        request_id.reset(token)
 
 
 @app.get("/health", response_model=HealthResponse, tags=["System"])

backend/app/operation_logs.py

@@ -0,0 +1,186 @@
+"""Bounded, asynchronous operational diagnostics, separate from business/Trace data.
+
+Only explicitly allowed metadata is stored. Never store prompts, tool arguments,
+provider response bodies or raw exception messages in this diagnostic channel.
+"""
+from __future__ import annotations
+
+import json
+import logging
+import math
+import queue
+import re
+import sqlite3
+import threading
+import traceback
+from contextvars import ContextVar
+from contextlib import closing
+from datetime import datetime, timezone
+from pathlib import Path
+
+from app.config import get_settings
+
+request_id: ContextVar[str] = ContextVar('log_request_id', default='')
+agent_run_id: ContextVar[str] = ContextVar('log_agent_run_id', default='')
+_allowed = {'run_id', 'task_id', 'note_id', 'job_id', 'provider_id', 'model',
+            'device', 'error_code', 'error_type', 'status', 'duration_ms', 'count',
+            'step', 'sequence', 'tool', 'method', 'route', 'request_id', 'fallback',
+            'frames', 'source', 'changed_fields'}
+_safe = re.compile(r'[^\w .:/@{}\[\],()=+\-]', re.UNICODE)
+
+
+def metadata(values: dict) -> dict:
+    result = {}
+    for key, value in values.items():
+        if key not in _allowed or value is None:
+            continue
+        if isinstance(value, (int, float, bool)):
+            if not isinstance(value, float) or math.isfinite(value):
+                result[key] = value
+        else:
+            text = str(value)
+            text = re.sub(r'(?i)(?:bearer\s+\S+|sk-[\w-]+)', '[REDACTED]', text)
+            result[key] = _safe.sub('', text)[:500]
+    return result
+
+
+class LogStore:
+    def __init__(self, path: Path, *, retain: int = 20_000):
+        self.path = path
+        self.retain = retain
+        self.queue: queue.Queue = queue.Queue(maxsize=4096)
+        self.dropped = 0
+        self.failed = 0
+        self.closed = False
+        self.state_lock = threading.Lock()
+        self.thread = threading.Thread(target=self._write, name='operation-logs', daemon=True)
+        path.parent.mkdir(parents=True, exist_ok=True)
+        with closing(self._connect()) as conn, conn:
+            conn.execute('CREATE TABLE IF NOT EXISTS logs (id INTEGER PRIMARY KEY, timestamp TEXT NOT NULL, level TEXT NOT NULL, source TEXT NOT NULL, event TEXT NOT NULL, details TEXT NOT NULL)')
+            conn.execute('CREATE INDEX IF NOT EXISTS logs_level_id ON logs(level, id)')
+            conn.execute('CREATE INDEX IF NOT EXISTS logs_source_id ON logs(source, id)')
+        self.thread.start()
+
+    def _connect(self):
+        conn = sqlite3.connect(self.path, timeout=5)
+        conn.row_factory = sqlite3.Row
+        return conn
+
+    def emit(self, level: str, source: str, event: str, details: dict):
+        row = (datetime.now(timezone.utc).isoformat(), level, source[:100], event[:160], json.dumps(metadata(details), ensure_ascii=False))
+        with self.state_lock:
+            if self.closed:
+                return
+            try:
+                self.queue.put_nowait(row)
+            except queue.Full:
+                self.dropped += 1
+
+    def _write(self):
+        while True:
+            first = self.queue.get()
+            batch = [first]
+            while len(batch) < 128:
+                try:
+                    batch.append(self.queue.get_nowait())
+                except queue.Empty:
+                    break
+            stop = None in batch
+            rows = [row for row in batch if row is not None]
+            try:
+                if rows:
+                    with closing(self._connect()) as conn, conn:
+                        conn.executemany('INSERT INTO logs(timestamp,level,source,event,details) VALUES(?,?,?,?,?)', rows)
+                        conn.execute('DELETE FROM logs WHERE id <= (SELECT id FROM logs ORDER BY id DESC LIMIT 1 OFFSET ?)', (self.retain,))
+            except Exception:
+                self.failed += len(rows)
+            finally:
+                for _ in batch:
+                    self.queue.task_done()
+            if stop:
+                return
+
+    def query(self, *, limit=50, before=None, level='', source='', q=''):
+        clauses, args = [], []
+        for column, value in [('level', level), ('source', source)]:
+            if value:
+                clauses.append(f'{column} = ?')
+                args.append(value)
+        if before is not None:
+            clauses.append('id < ?')
+            args.append(before)
+        if q:
+            clauses.append('(instr(event, ?) > 0 OR instr(details, ?) > 0)')
+            args += [q, q]
+        where = ' WHERE ' + ' AND '.join(clauses) if clauses else ''
+        with closing(self._connect()) as conn, conn:
+            rows = conn.execute('SELECT * FROM logs' + where + ' ORDER BY id DESC LIMIT ?', (*args, limit + 1)).fetchall()
+            sources = [row[0] for row in conn.execute('SELECT DISTINCT source FROM logs ORDER BY source')]
+        items = [{**dict(row), 'details': json.loads(row['details'])} for row in rows[:limit]]
+        return {'items': items, 'next_cursor': items[-1]['id'] if len(rows) > limit else None,
+                'sources': sources, 'pending': self.queue.qsize(), 'dropped': self.dropped,
+                'write_failures': self.failed, 'retention': self.retain}
+
+    def close(self):
+        with self.state_lock:
+            if self.closed:
+                return
+            self.closed = True
+        self.queue.put(None)
+        self.thread.join(timeout=15)
+
+
+_store: LogStore | None = None
+_lock = threading.Lock()
+
+
+def get_store() -> LogStore:
+    global _store
+    path = get_settings().data_dir / 'logs' / 'operations.sqlite3'
+    with _lock:
+        if _store is None or _store.path != path or _store.closed:
+            if _store is not None and not _store.closed:
+                _store.close()
+            _store = LogStore(path)
+        return _store
+
+
+def log_event(module: str, event: str, *, level='INFO', error: BaseException | None = None, **details):
+    if request_id.get():
+        details.setdefault('request_id', request_id.get())
+    if agent_run_id.get():
+        details.setdefault('run_id', agent_run_id.get())
+    if error:
+        details['error_type'] = type(error).__name__
+        details.setdefault('error_code', getattr(error, 'code', None))
+        details['frames'] = '; '.join(f'{Path(f.filename).name}:{f.lineno}:{f.name}' for f in traceback.extract_tb(error.__traceback__)[-8:])
+    try:
+        get_store().emit(level, module, event, details)
+    except Exception:
+        # Logging must not turn a successful save/run into a business failure.
+        logging.getLogger('operation_log_storage').error('Operational log storage unavailable')
+
+
+class ApplicationLogHandler(logging.Handler):
+    def emit(self, record):
+        if record.name == 'operation_log_storage' or getattr(record, '_notes_operation_logged', False):
+            return
+        record._notes_operation_logged = True
+        # Legacy log messages can include note text/credentials, even in f-strings.
+        # Preserve source location and error class; structured call sites carry IDs.
+        log_event(record.name, 'application.warning' if record.levelno < 40 else 'application.error',
+                  level=record.levelname, error=record.exc_info[1] if record.exc_info else None,
+                  frames=f'{Path(record.pathname).name}:{record.lineno}:{record.funcName}')
+
+
+def install_logging():
+    # Uvicorn's default logger stops propagation before the root logger.
+    for name in ('', 'uvicorn'):
+        logger = logging.getLogger(name)
+        if not any(isinstance(h, ApplicationLogHandler) for h in logger.handlers):
+            logger.addHandler(ApplicationLogHandler(level=logging.WARNING))
+
+
+def shutdown_logging():
+    if _store is not None and not _store.closed:
+        _store.close()

backend/app/plot/__init__.py

@@ -0,0 +1,7 @@
+"""Function Plot：函数图像的白名单表达式解析与静态 SVG 渲染。
+
+模块划分：
+- model.py    FunctionPlot 等内部数据模型（不进 contracts.py，同 Document AST）
+- parser.py   function-plot 源码与表达式解析（ast 白名单，绝不 eval/exec）
+- render.py   把 FunctionPlot 渲染为内嵌 SVG（纯几何 + <text>，无脚本）
+"""

backend/app/plot/model.py

@@ -0,0 +1,57 @@
+"""Function Plot 内部数据模型。
+
+契约 §12.2 的 FunctionPlot 结构与 §10.4 的 StaticRenderResult 只在导出链路的后端内部
+流转，不进入 HTTP 契约，因此与 Document AST 一样放在独立包内，不进 contracts.py。
+"""
+
+from __future__ import annotations
+
+from typing import Literal
+
+from pydantic import BaseModel, Field
+
+
+class FunctionPlotExpression(BaseModel):
+    """单条函数表达式；expression 为数学表达式文本（不含 ``y =`` 前缀）。"""
+
+    expression: str
+    label: str | None = None
+    color: str | None = None
+
+
+class PlotAxes(BaseModel):
+    xlabel: str | None = None
+    ylabel: str | None = None
+    grid: bool = True
+
+
+class FunctionPlot(BaseModel):
+    version: int = 1
+    expressions: list[FunctionPlotExpression]
+    domain: tuple[float, float] = (-10.0, 10.0)
+    range: tuple[float, float] | None = None
+    axes: PlotAxes = Field(default_factory=PlotAxes)
+    # 该块所有表达式 AST 节点数之和，供导出器做文档级累计复杂度预算
+    node_count: int = 0
+
+
+class PlotDiagnostic(BaseModel):
+    severity: Literal["warning", "error"]
+    code: str
+    message: str
+    line: int | None = None
+
+
+class FunctionPlotParseResult(BaseModel):
+    """解析结果：任一表达式 error 时 plot 为 None（整块回退占位），仅 warning 时 plot 有效。"""
+
+    plot: FunctionPlot | None = None
+    diagnostics: list[PlotDiagnostic] = Field(default_factory=list)
+
+
+class StaticRenderResult(BaseModel):
+    content: str
+    mime_type: str = "image/svg+xml"
+    width: int
+    height: int
+    warnings: list[str] = Field(default_factory=list)

backend/app/plot/parser.py

@@ -0,0 +1,412 @@
+"""Function Plot 表达式解析：白名单数学语法，绝不执行 eval / 函数构造器 / 属性访问。
+
+安全模型：先用 ``ast.parse(mode='eval')`` 把表达式变成纯 AST（这一步不执行任何代码），
+再逐节点白名单校验（只允许数字、变量 ``x``、常量 ``pi/e``、白名单函数调用与四则/幂
+运算），最后用递归解释器直接计算数值——全程不 ``compile``/``exec`` 字符串。
+"""
+
+from __future__ import annotations
+
+import ast
+import math
+import re
+from typing import NoReturn
+
+from app.plot.model import (
+    FunctionPlot,
+    FunctionPlotExpression,
+    FunctionPlotParseResult,
+    PlotAxes,
+    PlotDiagnostic,
+)
+
+# 白名单函数（ln 是 log 的别名）；abs 用内置函数，其余映射到 math
+_FUNCTION_IMPL: dict[str, object] = {
+    "sin": math.sin,
+    "cos": math.cos,
+    "tan": math.tan,
+    "asin": math.asin,
+    "acos": math.acos,
+    "atan": math.atan,
+    "sinh": math.sinh,
+    "cosh": math.cosh,
+    "tanh": math.tanh,
+    "exp": math.exp,
+    "log": math.log,
+    "ln": math.log,
+    "log10": math.log10,
+    "log2": math.log2,
+    "sqrt": math.sqrt,
+    "abs": abs,
+}
+_FUNCTIONS = frozenset(_FUNCTION_IMPL)
+_CONSTANTS: dict[str, float] = {"pi": math.pi, "e": math.e}
+
+_ALLOWED_BINOPS = (ast.Add, ast.Sub, ast.Mult, ast.Div, ast.Pow)
+_ALLOWED_UNARY = (ast.UAdd, ast.USub)
+_DIRECTIVE_KEYS = frozenset({"domain", "range", "xlabel", "ylabel", "grid"})
+_NUMBER_RE = re.compile(r"^(\d+\.?\d*|\.\d+)([eE][+-]?\d+)?$")
+
+# 表达式复杂度上限：深层嵌套或海量节点在递归校验/求值时会触发 RecursionError，
+# 用白名单校验提前拦截，保证失败走正常诊断路径而不是异常逃逸出导出链路。
+_MAX_AST_DEPTH = 200
+_MAX_AST_NODES = 1000
+# 单块 function-plot 允许的表达式数量上限，防止海量表达式导致超大 SVG 与海量采样求值
+_MAX_EXPRESSIONS = 16
+
+
+class PlotParseError(Exception):
+    """表达式解析/校验失败，携带可定位诊断。"""
+
+    def __init__(self, diagnostic: PlotDiagnostic) -> None:
+        super().__init__(diagnostic.message)
+        self.diagnostic = diagnostic
+
+
+def _unsafe(message: str) -> NoReturn:
+    raise PlotParseError(
+        PlotDiagnostic(severity="error", code="FUNCTION_PLOT_EXPRESSION_UNSAFE", message=message)
+    )
+
+
+def _is_number(tok: str) -> bool:
+    return bool(_NUMBER_RE.match(tok))
+
+
+def _tokenize(s: str) -> list[str]:
+    """把预处理后的表达式切成数字/标识符/运算符/括号 token。"""
+    tokens: list[str] = []
+    i = 0
+    n = len(s)
+    while i < n:
+        ch = s[i]
+        if ch.isspace():
+            i += 1
+            continue
+        if ch.isdigit() or ch == ".":
+            j = i
+            while j < n and (s[j].isdigit() or s[j] == "."):
+                j += 1
+            # 科学计数法：数字后紧跟 e/E[+-]数字 视为同一数字
+            if j < n and s[j] in "eE":
+                k = j + 1
+                if k < n and s[k] in "+-":
+                    k += 1
+                if k < n and s[k].isdigit():
+                    while k < n and s[k].isdigit():
+                        k += 1
+                    j = k
+            tokens.append(s[i:j])
+            i = j
+            continue
+        if ch.isalpha() or ch == "_":
+            j = i
+            while j < n and (s[j].isalnum() or s[j] == "_"):
+                j += 1
+            tokens.append(s[i:j])
+            i = j
+            continue
+        if ch == "*" and i + 1 < n and s[i + 1] == "*":
+            tokens.append("**")
+            i += 2
+            continue
+        tokens.append(ch)
+        i += 1
+    return tokens
+
+
+def _is_value_end(tok: str) -> bool:
+    """该 token 之后允许补乘号（数字/右括号/变量 x/常量）。"""
+    return tok == ")" or _is_number(tok) or tok == "x" or tok in _CONSTANTS
+
+
+def _is_value_start(tok: str) -> bool:
+    """该 token 可作为乘号右侧起点（左括号/数字/任意标识符，含函数名）。"""
+    return tok == "(" or _is_number(tok) or (tok and (tok[0].isalpha() or tok[0] == "_"))
+
+
+def _insert_implicit_multiplication(s: str) -> str:
+    """补隐式乘法：2x、2(x+1)、(x+1)(x-1)、x sin(x) 等；函数名后的 ``(`` 是调用不补。"""
+    tokens = _tokenize(s)
+    out: list[str] = []
+    prev: str | None = None
+    for tok in tokens:
+        if prev is not None and _is_value_end(prev) and _is_value_start(tok):
+            out.append("*")
+        out.append(tok)
+        prev = tok
+    return "".join(out)
+
+
+def _preprocess(expr: str) -> str:
+    """``^`` 视为幂，补隐式乘法后再交给 ast.parse。"""
+    return _insert_implicit_multiplication(expr.replace("^", "**"))
+
+
+def _check_node(node: ast.AST, depth: int = 0, counter: list[int] | None = None) -> None:
+    """白名单校验：任何越界节点都抛 FUNCTION_PLOT_EXPRESSION_UNSAFE。
+
+    同时限制 AST 深度与节点总数，避免超长/超深表达式在递归校验或求值时触发
+    RecursionError 而绕过解析失败路径。
+    """
+    if counter is None:
+        counter = [0]
+    if depth > _MAX_AST_DEPTH:
+        _unsafe(f"表达式嵌套过深（超过 {_MAX_AST_DEPTH} 层）")
+    counter[0] += 1
+    if counter[0] > _MAX_AST_NODES:
+        _unsafe(f"表达式过于复杂（节点数超过 {_MAX_AST_NODES}）")
+    if isinstance(node, ast.Constant):
+        if isinstance(node.value, bool) or not isinstance(node.value, (int, float)):
+            _unsafe(f"不支持的常量 {node.value!r}")
+        return
+    if isinstance(node, ast.Name):
+        if node.id == "x" or node.id in _CONSTANTS:
+            return
+        _unsafe(f"未知标识符 {node.id!r}")
+    if isinstance(node, ast.BinOp):
+        if not isinstance(node.op, _ALLOWED_BINOPS):
+            _unsafe(f"不支持的运算符 {type(node.op).__name__}")
+        _check_node(node.left, depth + 1, counter)
+        _check_node(node.right, depth + 1, counter)
+        return
+    if isinstance(node, ast.UnaryOp):
+        if not isinstance(node.op, _ALLOWED_UNARY):
+            _unsafe(f"不支持的运算符 {type(node.op).__name__}")
+        _check_node(node.operand, depth + 1, counter)
+        return
+    if isinstance(node, ast.Call):
+        if not isinstance(node.func, ast.Name) or node.func.id not in _FUNCTIONS:
+            _unsafe(f"不支持的函数调用 {ast.dump(node.func)!r}")
+        if node.keywords:
+            _unsafe("函数调用不支持关键字参数")
+        # 白名单内所有函数均恰取 1 个参数，提前校验避免求值期 TypeError
+        if len(node.args) != 1:
+            _unsafe(f"{node.func.id} 需要 1 个参数，实际 {len(node.args)} 个")
+        for arg in node.args:
+            _check_node(arg, depth + 1, counter)
+        return
+    _unsafe(f"不支持的语法 {type(node).__name__}")
+
+
+def parse_expression(expr: str) -> ast.Expression:
+    """把数学表达式解析为已通过白名单校验的 AST（可直接交给 evaluate）。"""
+    preprocessed = _preprocess(expr)
+    try:
+        tree = ast.parse(preprocessed, mode="eval")
+    except SyntaxError as exc:
+        raise PlotParseError(
+            PlotDiagnostic(
+                severity="error",
+                code="FUNCTION_PLOT_PARSE_FAILED",
+                message=f"表达式语法错误：{exc.msg}",
+            )
+        ) from exc
+    except RecursionError as exc:
+        # 极深嵌套可能在 ast.parse 阶段就触发 RecursionError，转为可定位诊断
+        raise PlotParseError(
+            PlotDiagnostic(
+                severity="error",
+                code="FUNCTION_PLOT_PARSE_FAILED",
+                message="表达式嵌套过深，无法解析",
+            )
+        ) from exc
+    _check_node(tree.body)
+    return tree
+
+
+def _count_nodes(node: ast.AST) -> int:
+    """统计已通过校验的表达式 AST 节点数，供文档级累计复杂度预算使用。"""
+    counter = [0]
+    _check_node(node, counter=counter)
+    return counter[0]
+
+
+def evaluate(expr_ast: ast.Expression, x: float) -> float:
+    """递归解释已校验 AST 得到数值，全程不编译/执行代码。"""
+    return _eval_node(expr_ast.body, x)
+
+
+def _eval_node(node: ast.AST, x: float) -> float:
+    if isinstance(node, ast.Constant):
+        return float(node.value)
+    if isinstance(node, ast.Name):
+        return x if node.id == "x" else _CONSTANTS[node.id]
+    if isinstance(node, ast.BinOp):
+        left = _eval_node(node.left, x)
+        right = _eval_node(node.right, x)
+        if isinstance(node.op, ast.Add):
+            return left + right
+        if isinstance(node.op, ast.Sub):
+            return left - right
+        if isinstance(node.op, ast.Mult):
+            return left * right
+        if isinstance(node.op, ast.Div):
+            return left / right
+        # 负数底 + 非整数指数会得到复数，数学绘图不支持，抛 ValueError 让采样点作为断点处理
+        if left < 0 and not right.is_integer():
+            raise ValueError("negative base with fractional exponent")
+        return left**right
+    if isinstance(node, ast.UnaryOp):
+        value = _eval_node(node.operand, x)
+        return -value if isinstance(node.op, ast.USub) else value
+    if isinstance(node, ast.Call):
+        args = [_eval_node(arg, x) for arg in node.args]
+        return _FUNCTION_IMPL[node.func.id](*args)  # type: ignore[operator]
+    raise ValueError("unreachable node")
+
+
+def _strip_comment(line: str) -> str:
+    return line.split("#", 1)[0].strip()
+
+
+def _parse_pair(value: str) -> tuple[float, float]:
+    """解析 ``min, max`` / ``min max`` 数值对。"""
+    parts = [p for p in re.split(r"[,，\s]+", value.strip()) if p]
+    if len(parts) != 2:
+        raise ValueError("需要两个数值")
+    return float(parts[0]), float(parts[1])
+
+
+def _parse_directive(line: str) -> tuple[str, str] | None:
+    """指令行形如 ``key: value``（表达式不含冒号，冒号是可靠判别）。"""
+    if ":" not in line or "=" in line:
+        return None
+    key, _, value = line.partition(":")
+    key = key.strip().lower()
+    if not key or " " in key:
+        return None
+    return key, value.strip()
+
+
+def parse_source(source: str) -> FunctionPlotParseResult:
+    """把 function-plot fenced block 源码解析为 FunctionPlot + 诊断。"""
+    diagnostics: list[PlotDiagnostic] = []
+    expressions: list[FunctionPlotExpression] = []
+    domain: tuple[float, float] = (-10.0, 10.0)
+    range_: tuple[float, float] | None = None
+    xlabel: str | None = None
+    ylabel: str | None = None
+    grid: bool = True
+    has_error = False
+    total_nodes = 0
+
+    for lineno, raw_line in enumerate(source.splitlines(), start=1):
+        line = raw_line.strip()
+        if not line or line.startswith("#"):
+            continue
+
+        directive = _parse_directive(line)
+        if directive is not None:
+            key, value = directive
+            if key == "domain":
+                try:
+                    domain = _parse_pair(value)
+                except ValueError:
+                    diagnostics.append(
+                        PlotDiagnostic(
+                            severity="warning",
+                            code="FUNCTION_PLOT_PARSE_FAILED",
+                            message=f"domain 需要两个数值，已忽略：{value!r}",
+                            line=lineno,
+                        )
+                    )
+            elif key == "range":
+                try:
+                    range_ = _parse_pair(value)
+                except ValueError:
+                    diagnostics.append(
+                        PlotDiagnostic(
+                            severity="warning",
+                            code="FUNCTION_PLOT_PARSE_FAILED",
+                            message=f"range 需要两个数值，已忽略：{value!r}",
+                            line=lineno,
+                        )
+                    )
+            elif key == "xlabel":
+                xlabel = value or None
+            elif key == "ylabel":
+                ylabel = value or None
+            elif key == "grid":
+                grid = value.lower() in ("true", "1", "yes", "on")
+            else:
+                diagnostics.append(
+                    PlotDiagnostic(
+                        severity="warning",
+                        code="FUNCTION_PLOT_PARSE_FAILED",
+                        message=f"未知指令 {key!r} 已忽略",
+                        line=lineno,
+                    )
+                )
+            continue
+
+        # 表达式行：y = <expr> 或裸 <expr>
+        expr_text = _strip_comment(line)
+        if not expr_text:
+            continue
+        if "=" in expr_text:
+            lhs, _, rhs = expr_text.partition("=")
+            if lhs.strip().lower() not in ("y", ""):
+                diagnostics.append(
+                    PlotDiagnostic(
+                        severity="error",
+                        code="FUNCTION_PLOT_PARSE_FAILED",
+                        message="表达式应形如 'y = <expr>'",
+                        line=lineno,
+                    )
+                )
+                has_error = True
+                continue
+            expr_text = rhs.strip()
+        if not expr_text:
+            diagnostics.append(
+                PlotDiagnostic(
+                    severity="error",
+                    code="FUNCTION_PLOT_PARSE_FAILED",
+                    message="表达式为空",
+                    line=lineno,
+                )
+            )
+            has_error = True
+            continue
+
+        try:
+            tree = parse_expression(expr_text)
+        except PlotParseError as exc:
+            exc.diagnostic.line = lineno
+            diagnostics.append(exc.diagnostic)
+            has_error = True
+            continue
+        total_nodes += _count_nodes(tree.body)
+        expressions.append(FunctionPlotExpression(expression=expr_text))
+        # 表达式数量超限：整块回退并提前终止，避免对海量表达式做采样求值
+        if len(expressions) > _MAX_EXPRESSIONS:
+            diagnostics.append(
+                PlotDiagnostic(
+                    severity="error",
+                    code="FUNCTION_PLOT_TOO_MANY_EXPRESSIONS",
+                    message=f"表达式数量超过上限 {_MAX_EXPRESSIONS}，已回退为源码占位",
+                )
+            )
+            return FunctionPlotParseResult(plot=None, diagnostics=diagnostics)
+
+    if has_error:
+        return FunctionPlotParseResult(plot=None, diagnostics=diagnostics)
+    if not expressions:
+        diagnostics.append(
+            PlotDiagnostic(
+                severity="error",
+                code="FUNCTION_PLOT_PARSE_FAILED",
+                message="没有找到任何函数表达式",
+            )
+        )
+        return FunctionPlotParseResult(plot=None, diagnostics=diagnostics)
+
+    plot = FunctionPlot(
+        expressions=expressions,
+        domain=domain,
+        range=range_,
+        axes=PlotAxes(xlabel=xlabel, ylabel=ylabel, grid=grid),
+        node_count=total_nodes,
+    )
+    return FunctionPlotParseResult(plot=plot, diagnostics=diagnostics)

backend/app/plot/render.py

@@ -0,0 +1,258 @@
+"""Function Plot → 静态 SVG 渲染。
+
+只输出纯几何与 <text> 的 SVG（无 script/foreignObject/内联事件），可安全内嵌 HTML。
+所有文本与颜色都经过转义/校验，不把用户输入直接拼进标记。
+"""
+
+from __future__ import annotations
+
+import html
+import math
+import re
+from typing import Callable
+
+from app.plot.model import FunctionPlot, StaticRenderResult
+from app.plot.parser import PlotParseError, evaluate, parse_expression
+
+_WIDTH = 640
+_HEIGHT = 480
+_MARGIN = 52  # 四周留白，放轴刻度与标签
+_SAMPLES = 400
+_PALETTE = ["#0969da", "#d1242f", "#1a7f37", "#8250df", "#bf8700", "#e36209"]
+_COLOR_RE = re.compile(r"^#[0-9a-fA-F]{3,8}$")
+
+
+def _safe_color(color: str | None, fallback: str) -> str:
+    return color.strip() if color and _COLOR_RE.match(color.strip()) else fallback
+
+
+def _valid_span(lo: float, hi: float) -> bool:
+    """范围跨度有效：端点有限、跨度有限且大于零。
+
+    端点相减可能溢出为 ``inf``（如 ``-1e308`` 到 ``1e308``），需单独校验跨度，
+    否则后续坐标换算会生成含 ``nan`` 的 SVG。
+    """
+    span = hi - lo
+    return math.isfinite(lo) and math.isfinite(hi) and math.isfinite(span) and span > 0
+
+
+def _fmt_num(v: float) -> str:
+    if v == 0:
+        return "0"
+    if abs(v) >= 1e6 or abs(v) < 1e-6:
+        return f"{v:.2e}"
+    return f"{v:.6g}"
+
+
+def _nice_step(span: float, target_ticks: int = 6) -> float:
+    raw = abs(span) / target_ticks
+    if not math.isfinite(raw) or raw <= 0:
+        return 1.0  # 兜底步长，避免 span 为 0/inf 时产生非法刻度
+    mag = 10 ** math.floor(math.log10(raw))
+    for m in (1, 2, 5, 10):
+        if raw <= m * mag:
+            return m * mag
+    return 10 * mag
+
+
+def _ticks(lo: float, hi: float, step: float) -> list[float]:
+    # 防御：非法步长直接返回空，避免除零
+    if not math.isfinite(step) or step <= 0:
+        return []
+    first = math.ceil(lo / step) * step
+    values: list[float] = []
+    v = first
+    # 有上限的整数索引推进 + 步长推进校验，防止浮点精度导致 v+step==v 的死循环
+    for _ in range(1000):
+        if v > hi + step * 1e-9:
+            break
+        values.append(v)
+        nxt = v + step
+        if nxt <= v:
+            break  # 步长小于当前数值的浮点精度，已无法推进
+        v = nxt
+    return values
+
+
+def _compute_range(
+    fns: list[tuple[object, object]],
+    xmin: float,
+    xmax: float,
+) -> tuple[float, float]:
+    """采样确定 y 范围；取有限样本的 min/max 加 5% 余量。"""
+    ys: list[float] = []
+    for _expr, tree in fns:
+        for i in range(_SAMPLES + 1):
+            x = xmin + (xmax - xmin) * i / _SAMPLES
+            try:
+                y = evaluate(tree, x)  # type: ignore[arg-type]
+            except (ValueError, ZeroDivisionError, OverflowError, TypeError):
+                continue
+            # 复数等非实数结果直接跳过，不参与范围统计
+            if isinstance(y, (int, float)) and math.isfinite(y):
+                ys.append(y)
+
+    if not ys:
+        return -10.0, 10.0
+    lo, hi = min(ys), max(ys)
+    if lo == hi:
+        lo -= 1.0
+        hi += 1.0
+    pad = (hi - lo) * 0.05
+    return lo - pad, hi + pad
+
+
+def _polyline(
+    tree: object,
+    xmin: float,
+    xmax: float,
+    sx: Callable[[float], float],
+    sy: Callable[[float], float],
+    color: str,
+) -> str:
+    """采样并把非有限点处断开成多段 polyline，避免画穿渐近线。"""
+    segments: list[str] = []
+    points: list[str] = []
+    for i in range(_SAMPLES + 1):
+        x = xmin + (xmax - xmin) * i / _SAMPLES
+        try:
+            y = evaluate(tree, x)  # type: ignore[arg-type]
+        except (ValueError, ZeroDivisionError, OverflowError, TypeError):
+            y = math.nan
+        if not isinstance(y, (int, float)) or not math.isfinite(y):
+            if points:
+                segments.append(f'<polyline points="{" ".join(points)}" fill="none" stroke="{color}"/>')
+                points = []
+            continue
+        px = sx(x)
+        py = sy(y)
+        # 映射后的坐标必须有限：显式 range 下极端 y 值可能让像素坐标溢出为 inf
+        if not (math.isfinite(px) and math.isfinite(py)):
+            if points:
+                segments.append(f'<polyline points="{" ".join(points)}" fill="none" stroke="{color}"/>')
+                points = []
+            continue
+        points.append(f"{px:.2f},{py:.2f}")
+    if points:
+        segments.append(f'<polyline points="{" ".join(points)}" fill="none" stroke="{color}"/>')
+    return "".join(segments)
+
+
+def _grid(
+    xmin: float,
+    xmax: float,
+    ymin: float,
+    ymax: float,
+    sx: Callable[[float], float],
+    sy: Callable[[float], float],
+) -> str:
+    parts: list[str] = []
+    for x in _ticks(xmin, xmax, _nice_step(xmax - xmin)):
+        parts.append(f'<line x1="{sx(x):.2f}" y1="{sy(ymin):.2f}" x2="{sx(x):.2f}" y2="{sy(ymax):.2f}" stroke="#eaeef2"/>')
+    for y in _ticks(ymin, ymax, _nice_step(ymax - ymin)):
+        parts.append(f'<line x1="{sx(xmin):.2f}" y1="{sy(y):.2f}" x2="{sx(xmax):.2f}" y2="{sy(y):.2f}" stroke="#eaeef2"/>')
+    return "".join(parts)
+
+
+def _axes(
+    xmin: float,
+    xmax: float,
+    ymin: float,
+    ymax: float,
+    sx: Callable[[float], float],
+    sy: Callable[[float], float],
+) -> str:
+    parts: list[str] = []
+    # 坐标轴：过原点则画在原点，否则贴边，保证始终有参照系
+    x_axis_y = 0.0 if ymin <= 0 <= ymax else ymin
+    y_axis_x = 0.0 if xmin <= 0 <= xmax else xmin
+    parts.append(
+        f'<line x1="{sx(xmin):.2f}" y1="{sy(x_axis_y):.2f}" x2="{sx(xmax):.2f}" y2="{sy(x_axis_y):.2f}" stroke="#57606a"/>'
+    )
+    parts.append(
+        f'<line x1="{sx(y_axis_x):.2f}" y1="{sy(ymin):.2f}" x2="{sx(y_axis_x):.2f}" y2="{sy(ymax):.2f}" stroke="#57606a"/>'
+    )
+    # x 轴刻度数字（画在轴下方）
+    for x in _ticks(xmin, xmax, _nice_step(xmax - xmin)):
+        parts.append(
+            f'<text x="{sx(x):.2f}" y="{sy(x_axis_y) + 14:.2f}" text-anchor="middle" font-size="10" fill="#57606a">{html.escape(_fmt_num(x))}</text>'
+        )
+    # y 轴刻度数字（画在轴左侧）
+    for y in _ticks(ymin, ymax, _nice_step(ymax - ymin)):
+        parts.append(
+            f'<text x="{sx(y_axis_x) - 6:.2f}" y="{sy(y) + 3:.2f}" text-anchor="end" font-size="10" fill="#57606a">{html.escape(_fmt_num(y))}</text>'
+        )
+    return "".join(parts)
+
+
+def _labels(plot: FunctionPlot, sx: Callable[[float], float], sy: Callable[[float], float]) -> str:
+    parts: list[str] = []
+    if plot.axes.xlabel:
+        parts.append(
+            f'<text x="{(_WIDTH / 2):.2f}" y="{_HEIGHT - 10:.2f}" text-anchor="middle" font-size="12" fill="#1f2328">{html.escape(plot.axes.xlabel)}</text>'
+        )
+    if plot.axes.ylabel:
+        parts.append(
+            f'<text x="16" y="{(_HEIGHT / 2):.2f}" text-anchor="middle" font-size="12" fill="#1f2328" transform="rotate(-90 16 {_HEIGHT / 2:.2f})">{html.escape(plot.axes.ylabel)}</text>'
+        )
+    return "".join(parts)
+
+
+def render_svg(plot: FunctionPlot) -> StaticRenderResult:
+    """把已解析的 FunctionPlot 渲染为内嵌 SVG。"""
+    warnings: list[str] = []
+    xmin, xmax = plot.domain
+    if not _valid_span(xmin, xmax):
+        warnings.append("domain 无效，回退到 [-10, 10]")
+        xmin, xmax = -10.0, 10.0
+
+    # 重新解析并编译表达式（parse_source 已校验，这里异常只在模型被绕过时触发）
+    fns: list[tuple[object, object]] = []
+    for expr in plot.expressions:
+        try:
+            tree = parse_expression(expr.expression)
+        except PlotParseError as exc:
+            warnings.append(f"表达式无法渲染，已跳过：{expr.expression}（{exc.diagnostic.message}）")
+            continue
+        fns.append((expr, tree))
+
+    # 纵轴范围：显式 range 有效则用之；无效（退化/非有限/跨度溢出）丢弃并自动采样重算
+    if plot.range is not None:
+        lo, hi = float(plot.range[0]), float(plot.range[1])
+        if _valid_span(lo, hi):
+            ymin, ymax = lo, hi
+        else:
+            warnings.append("range 无效，改用自动范围")
+            ymin, ymax = _compute_range(fns, xmin, xmax)
+    else:
+        ymin, ymax = _compute_range(fns, xmin, xmax)
+
+    # 最终防线：自动范围在极端样本下也可能溢出，坐标映射前必须保证跨度有限且大于零
+    if not _valid_span(ymin, ymax):
+        warnings.append("y 范围跨度无法表示，回退到 [-10, 10]")
+        ymin, ymax = -10.0, 10.0
+
+    def sx(x: float) -> float:
+        return _MARGIN + (x - xmin) / (xmax - xmin) * (_WIDTH - 2 * _MARGIN)
+
+    def sy(y: float) -> float:
+        return _HEIGHT - _MARGIN - (y - ymin) / (ymax - ymin) * (_HEIGHT - 2 * _MARGIN)
+
+    parts: list[str] = [
+        f'<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 {_WIDTH} {_HEIGHT}" role="img">'
+    ]
+    if plot.axes.grid:
+        parts.append(_grid(xmin, xmax, ymin, ymax, sx, sy))
+    parts.append(_axes(xmin, xmax, ymin, ymax, sx, sy))
+    for i, (expr, tree) in enumerate(fns):
+        color = _safe_color(expr.color, _PALETTE[i % len(_PALETTE)])
+        parts.append(_polyline(tree, xmin, xmax, sx, sy, color))
+    parts.append(_labels(plot, sx, sy))
+    parts.append("</svg>")
+
+    return StaticRenderResult(
+        content="".join(parts),
+        width=_WIDTH,
+        height=_HEIGHT,
+        warnings=warnings,
+    )

backend/app/plot/renderer.py

@@ -0,0 +1,66 @@
+"""StaticRenderer 内部契约（契约 §10.4）。
+
+把「静态可视化」抽象为统一请求/协议：导出器只面向 StaticRenderer，不再直接调用
+``render_svg`` 等具体实现。后端当前仅能静态渲染函数图像；Mermaid 后端无渲染能力，
+返回占位结果交前端渲染。
+"""
+
+from __future__ import annotations
+
+from typing import Literal, Protocol
+
+from pydantic import BaseModel, Field
+
+from app.plot.model import FunctionPlot, FunctionPlotParseResult, StaticRenderResult
+from app.plot.parser import parse_source
+from app.plot.render import render_svg
+
+
+class StaticRenderRequest(BaseModel):
+    """一次静态渲染请求；source_hash 供缓存/去重，theme 供主题化渲染。"""
+
+    kind: Literal["function_plot", "mermaid"]
+    source: str
+    source_hash: str = ""
+    theme: str | None = None
+    width: int | None = None
+    height: int | None = None
+
+
+class StaticRenderer(Protocol):
+    """静态渲染器协议：请求 → 渲染结果（content 为可直接内嵌的标记）。"""
+
+    def render(self, request: StaticRenderRequest) -> StaticRenderResult: ...
+
+
+class FunctionPlotStaticRenderer:
+    """函数图像渲染器：parse_source 解析 → render_svg 输出内嵌 SVG。
+
+    ``parse`` 与 ``render_plot`` 拆开，供导出器在渲染前先拿 node_count 做文档级
+    累计复杂度预算、并消费解析诊断。
+    """
+
+    def parse(self, request: StaticRenderRequest) -> FunctionPlotParseResult:
+        return parse_source(request.source)
+
+    def render(self, request: StaticRenderRequest) -> StaticRenderResult:
+        parsed = self.parse(request)
+        if parsed.plot is None:
+            raise ValueError("function-plot source has no valid plot")
+        return self.render_plot(parsed.plot)
+
+    def render_plot(self, plot: FunctionPlot) -> StaticRenderResult:
+        return render_svg(plot)
+
+
+class MermaidStaticRenderer:
+    """Mermaid 后端无渲染能力：返回空占位结果，交前端渲染。"""
+
+    def render(self, request: StaticRenderRequest) -> StaticRenderResult:
+        return StaticRenderResult(
+            content="",
+            mime_type="text/plain",
+            width=0,
+            height=0,
+            warnings=["mermaid 需前端渲染，已保留为占位代码块"],
+        )

backend/app/retrieval/activity.py

@@ -0,0 +1,30 @@
+"""Process-local retrieval activity, shared by search, RAG and Agent callers."""
+import asyncio
+from functools import wraps
+
+active = 0
+completed = 0
+failed = 0
+cancelled = 0
+
+
+def track_search(operation):
+    @wraps(operation)
+    async def wrapped(self, request):
+        global active, completed, failed, cancelled
+        if request.mode == 'fts':
+            return await operation(self, request)
+        active += 1
+        try:
+            result = await operation(self, request)
+            completed += 1
+            return result
+        except asyncio.CancelledError:
+            cancelled += 1
+            raise
+        except Exception:
+            failed += 1
+            raise
+        finally:
+            active -= 1
+    return wrapped

backend/app/retrieval/engine.py

@@ -10,6 +10,7 @@ from __future__ import annotations
 from datetime import datetime, timezone
 
 from app import repository
+from app.retrieval.activity import track_search
 from app.contracts import (
     Citation,
     PageMeta,
@@ -52,6 +53,7 @@ class RetrievalEngine:
         # remain authoritative, including monkeypatches on the singleton.
         self._routed_defaults = (embedding, vector_store) if route_embeddings else None
 
+    @track_search
     async def search(self, request: SearchRequest) -> SearchResponse:
         if request.mode == SearchMode.fts:
             return self._search_fts(request)

backend/app/retrieval/routed_vectors.py

@@ -2,15 +2,14 @@
 
 The runtime's model_id is the authoritative space ID (including provider URL,
 endpoint, model and dimensions); equal dimensions alone never imply compatibility.
-This phase uses a lazy, rebuildable SQLite side table instead of a schema migration.
-Search scans only current blocks in one database snapshot and requires complete
-coverage. Cosine ranking costs O(blocks * dimensions) with an O(top_k) heap; this
-small-vault implementation should become a per-space ANN index at larger scale.
+Durable vectors are reused to build per-space/dimension sqlite-vec indexes lazily.
+Native exact KNN avoids Python JSON decoding and dot products on every search.
+Coverage checks and ranking share one transaction.
 """
 
 from __future__ import annotations
 
-import heapq
+import asyncio
 import json
 import logging
 import math
@@ -20,9 +19,11 @@ from typing import Protocol
 
 from app.database.db import connect, transaction
 from app.errors import ApiError
+from app.operation_logs import log_event
 from app.retrieval.vectorstore import VectorHit
 from app.retrieval.provenance import record_embedding
 from app.retrieval.hybrid import rrf_fuse
+from app.retrieval import space_index
 
 logger = logging.getLogger(__name__)
 
@@ -101,6 +102,8 @@ async def embed_remote(texts: list[str], *, accept_local=False, strict=False, lo
             source=result.source,
         )
     except Exception as exc:
+        log_event('vectors', 'embedding.failed', level='ERROR' if strict else 'WARNING', error=exc,
+                  count=len(texts), fallback='none' if strict else 'local_index')
         # Avoid logging provider exceptions containing credentials or note text.
         record_embedding(fallback_reason="REMOTE_EMBEDDING_UNAVAILABLE")
         logger.warning("Remote embedding unavailable (%s); using local index", type(exc).__name__)
@@ -118,9 +121,15 @@ def _ensure_table(conn: sqlite3.Connection) -> None:
             block_id TEXT NOT NULL REFERENCES blocks(block_id) ON DELETE CASCADE,
             dimensions INTEGER NOT NULL CHECK (dimensions > 0),
             vector TEXT NOT NULL,
-            PRIMARY KEY (space_id, block_id)
+            PRIMARY KEY (space_id, dimensions, block_id)
         )
     """)
+    primary = [row[1] for row in sorted(conn.execute('PRAGMA table_info(routed_block_vectors)'), key=lambda row: row[5]) if row[5]]
+    if primary == ['space_id', 'block_id']:
+        conn.execute('CREATE TABLE routed_block_vectors_upgrade (space_id TEXT NOT NULL, block_id TEXT NOT NULL REFERENCES blocks(block_id) ON DELETE CASCADE, dimensions INTEGER NOT NULL CHECK(dimensions>0), vector TEXT NOT NULL, PRIMARY KEY(space_id,dimensions,block_id))')
+        conn.execute('INSERT INTO routed_block_vectors_upgrade SELECT * FROM routed_block_vectors')
+        conn.execute('DROP TABLE routed_block_vectors')
+        conn.execute('ALTER TABLE routed_block_vectors_upgrade RENAME TO routed_block_vectors')
     conn.execute("""
         CREATE INDEX IF NOT EXISTS routed_block_vectors_block_id
         ON routed_block_vectors(block_id)
@@ -146,13 +155,14 @@ def store_remote(
             conn.executemany(
                 """INSERT INTO routed_block_vectors (space_id, block_id, dimensions, vector)
                    VALUES (?, ?, ?, ?)
-                   ON CONFLICT (space_id, block_id) DO UPDATE SET
+                   ON CONFLICT (space_id, dimensions, block_id) DO UPDATE SET
                        dimensions = excluded.dimensions, vector = excluded.vector""",
                 [
                     (batch.space_id, block_id, batch.dimensions, json.dumps(vector, allow_nan=False))
                     for block_id, vector in zip(block_ids, batch.vectors)
                 ],
             )
+            space_index.upsert(conn, block_ids, batch)
         except BaseException:
             conn.execute("ROLLBACK TO routed_vectors_write")
             raise
@@ -180,6 +190,50 @@ async def search_remote(query: str, *, top_k: int, accept_local=False, strict=Fa
     if batch is None:
         return None
 
+    if not await _prepare_for_search([batch], strict):
+        return None
+    return await asyncio.to_thread(_search_space, batch, top_k, strict)
+
+
+async def _prepare_indexes(batches):
+    from app.services.coordination import vault_mutation_lock
+    def prepare(check_only=False):
+        conn = connect()
+        try:
+            if check_only:
+                return space_index.is_ready(conn, batches)
+            space_index.prepare(conn, batches)
+        finally:
+            conn.close()
+    if await asyncio.to_thread(prepare, True):
+        return
+    # Share the cooperative gate with saves: never block the event loop on a
+    # SQLite write lock while a migration owns it in another thread.
+    async with vault_mutation_lock():
+        work = asyncio.create_task(asyncio.to_thread(prepare))
+        cancelled = False
+        while not work.done():
+            try:
+                await asyncio.shield(work)
+            except asyncio.CancelledError:
+                cancelled = True
+        work.result()
+        if cancelled:
+            raise asyncio.CancelledError
+
+
+async def _prepare_for_search(batches, strict):
+    try:
+        await _prepare_indexes(batches)
+        return True
+    except Exception as exc:
+        record_embedding(fallback_reason='REMOTE_INDEX_UNAVAILABLE')
+        if strict:
+            raise ApiError(409, 'SEMANTIC_INDEX_UNAVAILABLE', '向量索引准备失败，请检查索引状态。') from exc
+        return False
+
+
+def _search_space(batch, top_k, strict):
     record_embedding(attempted_space={"model_id": batch.space_id, "dimensions": batch.dimensions})
     try:
         conn = connect()
@@ -195,29 +249,7 @@ async def search_remote(query: str, *, top_k: int, accept_local=False, strict=Fa
                     if strict:
                         raise ValueError("semantic index missing")
                     return None
-                rows = conn.execute(
-                    """SELECT b.block_id, r.vector
-                       FROM blocks AS b
-                       LEFT JOIN routed_block_vectors AS r
-                         ON r.block_id = b.block_id AND r.space_id = ? AND r.dimensions = ?
-                       ORDER BY b.block_id""",
-                    (batch.space_id, batch.dimensions),
-                )
-
-                def hits():
-                    for row in rows:
-                        if row["vector"] is None:
-                            raise ValueError("remote space has incomplete block coverage")
-                        vector = _unit_vector(json.loads(row["vector"]), batch.dimensions)
-                        score = math.fsum(a * b for a, b in zip(batch.vectors[0], vector))
-                        yield VectorHit(id=row["block_id"], score=max(0.0, min(1.0, score)))
-
-                try:
-                    result = heapq.nlargest(top_k, hits(), key=lambda hit: hit.score)
-                finally:
-                    # Exceptions may retain the generator/traceback; finalize its
-                    # cursor now so a subsequent rebuild can acquire a write lock.
-                    rows.close()
+                result = space_index.search(conn, batch, top_k)
                 record_embedding(source=batch.source, model_id=batch.space_id,
                                  dimensions=batch.dimensions, fallback_reason=None)
                 return result
@@ -241,6 +273,12 @@ async def _search_partitioned(query: str, policies: set[bool], *, top_k: int, st
         if batch is None:
             return None
         batches[policy] = batch
+    if not await _prepare_for_search(list(batches.values()), strict):
+        return None
+    return await asyncio.to_thread(_search_partitions, batches, policies, top_k, strict)
+
+
+def _search_partitions(batches, policies, top_k, strict):
     conn = connect()
     try:
         with transaction(conn):
@@ -250,23 +288,7 @@ async def _search_partitioned(query: str, policies: set[bool], *, top_k: int, st
                 raise ValueError("embedding policies changed while querying")
             ranked = []
             for policy, batch in batches.items():
-                rows = conn.execute(
-                    "SELECT b.block_id,r.vector FROM blocks b LEFT JOIN routed_block_vectors r "
-                    "ON r.block_id=b.block_id AND r.space_id=? AND r.dimensions=? "
-                    "WHERE b.embedding_local_only=? ORDER BY b.block_id",
-                    (batch.space_id, batch.dimensions, int(policy)),
-                )
-                def hits():
-                    for row in rows:
-                        if row['vector'] is None:
-                            raise ValueError("incomplete policy coverage")
-                        vector = _unit_vector(json.loads(row['vector']), batch.dimensions)
-                        score = math.fsum(a * b for a, b in zip(batch.vectors[0], vector))
-                        yield VectorHit(id=row['block_id'], score=max(0.0, min(1.0, score)))
-                try:
-                    ranked.append(heapq.nlargest(top_k, hits(), key=lambda hit: hit.score))
-                finally:
-                    rows.close()
+                ranked.append(space_index.search(conn, batch, top_k, policy))
             spaces = [{"source": b.source, "model_id": b.space_id, "dimensions": b.dimensions,
                        "local_only": policy} for policy, b in batches.items()]
             record_embedding(source="mixed" if len({b.source for b in batches.values()}) > 1 else batch.source,

backend/app/retrieval/space_index.py

@@ -0,0 +1,89 @@
+"""Persistent vec0 indexes derived from durable routed vectors, one per space/dimension."""
+import hashlib
+import json
+import threading
+
+import sqlite_vec
+
+from app.retrieval.vectorstore import VectorHit
+
+
+_migration_lock = threading.Lock()
+
+
+def is_ready(conn, batches):
+    return all(conn.execute('SELECT 1 FROM sqlite_master WHERE name=?',
+               (table_name(batch.space_id, batch.dimensions),)).fetchone() for batch in batches)
+
+
+def prepare(conn, batches):
+    """Finish lazy writes before opening a search snapshot. Warm searches do not write."""
+    from app.retrieval.routed_vectors import _ensure_table
+    batches = list(batches)
+    if is_ready(conn, batches):
+        return
+    # Waiting holds no read transaction, so a concurrent migration can commit.
+    with _migration_lock:
+        if is_ready(conn, batches):
+            return
+        conn.execute('BEGIN IMMEDIATE')
+        try:
+            _ensure_table(conn)
+            for batch in batches:
+                ensure(conn, batch.space_id, batch.dimensions)
+            conn.execute('COMMIT')
+        except BaseException:
+            conn.execute('ROLLBACK')
+            raise
+
+
+def table_name(space, dimensions):
+    return 'routed_vec_' + hashlib.sha256(json.dumps([space, dimensions]).encode()).hexdigest()
+
+
+def ensure(conn, space, dimensions):
+    from app.retrieval.routed_vectors import _unit_vector
+    table = table_name(space, dimensions)
+    if conn.execute('SELECT 1 FROM sqlite_master WHERE name=?', (table,)).fetchone():
+        return table
+    if type(dimensions) is not int or not 0 < dimensions <= 8192:
+        raise ValueError('unsupported vector dimensions')
+    conn.execute(f'CREATE VIRTUAL TABLE {table} USING vec0(block_id TEXT PRIMARY KEY, embedding float[{dimensions}], local_only INTEGER)')
+    for row in conn.execute('SELECT r.block_id,r.vector,b.embedding_local_only FROM routed_block_vectors r JOIN blocks b USING(block_id) WHERE r.space_id=? AND r.dimensions=?', (space, dimensions)):
+        conn.execute(f'INSERT INTO {table}(block_id,embedding,local_only) VALUES (?,?,?)',
+                     (row[0], sqlite_vec.serialize_float32(_unit_vector(json.loads(row[1]), dimensions)), row[2]))
+    literal = conn.execute('SELECT quote(?)', (space,)).fetchone()[0]
+    for event in ('DELETE', 'UPDATE'):
+        conn.execute(f'''CREATE TRIGGER {table}_{event.lower()} AFTER {event} ON routed_block_vectors
+            WHEN old.space_id={literal} AND old.dimensions={dimensions}
+            BEGIN DELETE FROM {table} WHERE block_id=old.block_id; END''')
+    return table
+
+
+def upsert(conn, block_ids, batch):
+    from app.retrieval.routed_vectors import _unit_vector
+    table = ensure(conn, batch.space_id, batch.dimensions)
+    for block_id, vector in zip(block_ids, batch.vectors):
+        conn.execute(f'DELETE FROM {table} WHERE block_id=?', (block_id,))
+        conn.execute(f'INSERT INTO {table}(block_id,embedding,local_only) SELECT block_id,?,embedding_local_only FROM blocks WHERE block_id=?',
+                     (sqlite_vec.serialize_float32(_unit_vector(vector, batch.dimensions)), block_id))
+
+
+def search(conn, batch, top_k, policy=None):
+    table = table_name(batch.space_id, batch.dimensions)
+    # Coverage checks stay relational; no JSON decoding or Python dot products on the hot path.
+    where = '' if policy is None else ' AND b.embedding_local_only=?'
+    params = () if policy is None else (int(policy),)
+    missing = conn.execute(f'''SELECT 1 FROM blocks b LEFT JOIN routed_block_vectors r
+        ON r.block_id=b.block_id AND r.space_id=? AND r.dimensions=?
+        WHERE r.block_id IS NULL{where} LIMIT 1''', (batch.space_id, batch.dimensions, *params)).fetchone()
+    expected = conn.execute('SELECT COUNT(*) FROM blocks' + ('' if policy is None else ' WHERE embedding_local_only=?'), params).fetchone()[0]
+    actual = conn.execute(f'SELECT COUNT(*) FROM {table}' + ('' if policy is None else ' WHERE local_only=?'), params).fetchone()[0]
+    if missing or actual != expected:
+        raise ValueError('incomplete vector space coverage')
+    if top_k <= 0:
+        return []
+    rows = conn.execute(f'SELECT block_id,distance FROM {table} WHERE embedding MATCH ? AND k=?'
+                        + ('' if policy is None else ' AND local_only=?'),
+                        (sqlite_vec.serialize_float32(batch.vectors[0]), top_k, *params)).fetchall()
+    return [VectorHit(id=row[0], score=max(0.0, min(1.0, 1 - row[1] ** 2 / 2))) for row in rows]

backend/app/routes.py

@@ -6,11 +6,12 @@ from datetime import datetime, timezone
 from uuid import uuid4
 
 from fastapi import APIRouter, Header, Query, Request
-from fastapi.responses import StreamingResponse
+from fastapi.responses import FileResponse, StreamingResponse
 
 from app.agent import AgentCapacityError, AgentRunNotFoundError
 from app.container import container
 from app.config import get_settings
+from app.operation_logs import log_event
 from app.extensions.archive import MAX_ZIP_BYTES, install_zip
 from app.services.persona_settings import PersonaSettings, load_persona, save_persona
 from app.contracts import (
@@ -56,6 +57,11 @@ from app.contracts import (
     ModelRoutingResponse,
     SpeakerMatchRequest,
     SpeakerMatchResult,
+    ExportFormat,
+    ExportJob,
+    ExportJobListResponse,
+    ExportRequest,
+    ExportStatus,
     Note,
     NoteCreateRequest,
     NoteListResponse,
@@ -104,9 +110,11 @@ from app.contracts import (
 from app.agent import AgentCapacityError, AgentRunNotFoundError
 from app.benchmarks import datasets as benchmark_datasets
 from app.benchmarks import service as benchmark_service
+from app.config import get_settings
 from app.container import container
 from app.services.persona_settings import PersonaSettings, load_persona, save_persona
 from app.errors import ApiError
+from app.export import service as export_service
 from app.extensions import ExtensionError
 from app.extensions.mcp_registry import McpRegistryError
 from app.providers.base import ProviderError
@@ -225,7 +233,7 @@ async def open_workspace(request: WorkspaceOpenRequest) -> WorkspaceSnapshot:
 
 @router.get("/workspace/tree", response_model=list[WorkspaceEntry], tags=["Workspace"])
 async def get_workspace_tree() -> list[WorkspaceEntry]:
-    return workspace_service.get_workspace_tree()
+    return await workspace_service.refresh_workspace_tree()
 
 
 @router.post("/workspace/folders", response_model=WorkspaceEntry, tags=["Workspace"])
@@ -286,7 +294,8 @@ async def get_note(note_id: str) -> Note:
 @router.patch("/notes/{note_id}", response_model=Note, tags=["Notes"])
 async def update_note(note_id: str, request: NoteUpdateRequest) -> Note:
     return await note_service.update_note(
-        note_id, title=request.title, markdown=request.markdown, tags=request.tags, defer_vectors=True
+        note_id, title=request.title, markdown=request.markdown, tags=request.tags,
+        expected_content_hash=request.expected_content_hash, defer_vectors=True
     )
 
 
@@ -454,11 +463,15 @@ async def chat(request: ChatRequest) -> StreamingResponse:
                         usage = {"input_tokens": input_tokens, "output_tokens": output_tokens,
                                  "total_tokens": input_tokens + output_tokens}
                     elif event.event == ModelEventType.error:
+                        log_event('chat', 'model.error', level='ERROR', provider_id=request.provider_id,
+                                  model=request.model, error_code=event.data.get('code'))
                         if assistant_content:
                             assistant_content += "\n\n"
                         assistant_content += str(event.data.get("message", "Model generation failed."))
                     yield as_sse(event.event.value, event.model_dump_json())
         except Exception as exc:
+            log_event('chat', 'chat.failed', level='ERROR', error=exc,
+                      provider_id=request.provider_id, model=request.model)
             failure_message = exc.message if isinstance(exc, ApiError) else "知识库检索或模型生成失败，请检查服务状态。"
             if assistant_content:
                 assistant_content += "\n\n"
@@ -497,7 +510,7 @@ async def chat(request: ChatRequest) -> StreamingResponse:
 async def list_agent_runs(
     limit: int = Query(default=50, ge=1, le=100), offset: int = Query(default=0, ge=0)
 ) -> AgentRunListResponse:
-    items, total = container.agent.list_runs(limit=limit, offset=offset)
+    items, total = await asyncio.to_thread(container.agent.list_runs, limit=limit, offset=offset)
     return AgentRunListResponse(
         items=items,
         page=PageMeta(total=total, limit=limit, offset=offset),
@@ -602,7 +615,7 @@ async def get_agent_trace(
     limit: int = Query(default=200, ge=1, le=500),
 ) -> AgentTraceResponse:
     try:
-        return container.agent.get_trace(
+        return await asyncio.to_thread(container.agent.get_trace,
             run_id, after_sequence=after_sequence, limit=limit
         )
     except AgentRunNotFoundError as exc:
@@ -623,7 +636,7 @@ async def decide_agent_permission(
     run_id: str, request_id: str, request: PermissionDecisionRequest
 ) -> OperationResponse:
     agent_run_or_404(run_id)
-    if not container.agent.resolve_permission(run_id, request_id, request.decision):
+    if not await container.agent.resolve_permission(run_id, request_id, request.decision):
         raise ApiError(
             404,
             "PERMISSION_REQUEST_NOT_FOUND",
@@ -1222,7 +1235,7 @@ async def test_provider(request: ProviderTestRequest) -> ProviderTestResponse:
 async def list_tasks(
     limit: int = Query(default=50, ge=1, le=100), offset: int = Query(default=0, ge=0)
 ) -> TaskListResponse:
-    items, total = task_service.list_tasks(limit=limit, offset=offset)
+    items, total = await asyncio.to_thread(task_service.list_tasks, limit=limit, offset=offset)
     return TaskListResponse(
         items=items, page=PageMeta(total=total, limit=limit, offset=offset)
     )
@@ -1230,12 +1243,12 @@ async def list_tasks(
 
 @router.post("/tasks", response_model=Task, tags=["Tasks"])
 async def create_task(request: TaskCreateRequest) -> Task:
-    return task_service.create_task(**request.model_dump())
+    return await task_service.write_in_background(task_service.create_task, **request.model_dump())
 
 
 @router.get("/tasks/{task_id}", response_model=Task, tags=["Tasks"])
 async def get_task(task_id: str) -> Task:
-    task = task_service.get_task(task_id)
+    task = await asyncio.to_thread(task_service.get_task, task_id)
     if task is None:
         raise ApiError(
             404, "RESOURCE_NOT_FOUND", "task not found", {"task_id": task_id}
@@ -1245,7 +1258,7 @@ async def get_task(task_id: str) -> Task:
 
 @router.patch("/tasks/{task_id}", response_model=Task, tags=["Tasks"])
 async def update_task(task_id: str, request: TaskUpdateRequest) -> Task:
-    return task_service.update_task(task_id, request.model_dump(exclude_unset=True))
+    return await task_service.write_in_background(task_service.update_task, task_id, request.model_dump(exclude_unset=True))
 
 
 @router.delete(
@@ -1254,7 +1267,7 @@ async def update_task(task_id: str, request: TaskUpdateRequest) -> Task:
     tags=["Tasks"],
 )
 async def delete_task(task_id: str) -> OperationResponse:
-    if not task_service.delete_task(task_id):
+    if not await task_service.write_in_background(task_service.delete_task, task_id):
         raise ApiError(
             404, "RESOURCE_NOT_FOUND", "task not found", {"task_id": task_id}
         )
@@ -1501,6 +1514,81 @@ async def get_benchmark_report(run_id: str) -> BenchmarkReport:
     return report
 
 
+@router.post(
+    "/exports",
+    response_model=ExportJob,
+    status_code=202,
+    tags=["Export"],
+)
+async def create_export(request: ExportRequest) -> ExportJob:
+    return await export_service.create_export(request)
+
+
+@router.get(
+    "/exports",
+    response_model=ExportJobListResponse,
+    tags=["Export"],
+)
+async def list_exports(
+    status: ExportStatus | None = Query(default=None),
+    format: ExportFormat | None = Query(default=None),
+    limit: int = Query(default=50, ge=1, le=200),
+    offset: int = Query(default=0, ge=0),
+) -> ExportJobListResponse:
+    items, total = export_service.list_exports(
+        status=status, format=format, limit=limit, offset=offset
+    )
+    return ExportJobListResponse(
+        items=items, page=PageMeta(total=total, limit=limit, offset=offset)
+    )
+
+
+@router.get(
+    "/exports/{job_id}",
+    response_model=ExportJob,
+    tags=["Export"],
+)
+async def get_export(job_id: str) -> ExportJob:
+    job = export_service.get_export(job_id)
+    if job is None:
+        raise ApiError(
+            404, "EXPORT_JOB_NOT_FOUND", "export job not found", {"job_id": job_id}
+        )
+    return job
+
+
+@router.get(
+    "/exports/{job_id}/file",
+    tags=["Export"],
+)
+async def get_export_file(job_id: str) -> FileResponse:
+    path = export_service.get_export_file(job_id)  # 未完成/过期分别抛 404/410
+    job = export_service.get_export(job_id)
+    if job is None or job.file is None:
+        raise ApiError(
+            404, "EXPORT_JOB_NOT_FOUND", "export file not ready", {"job_id": job_id}
+        )
+    return FileResponse(
+        path=path,
+        media_type=job.file.mime_type,
+        filename=job.file.file_name,
+    )
+
+
+@router.post(
+    "/exports/{job_id}/cancel",
+    response_model=OperationResponse,
+    tags=["Export"],
+)
+async def cancel_export(job_id: str) -> OperationResponse:
+    job = export_service.cancel_export(job_id)
+    if job is None:
+        raise ApiError(
+            404, "EXPORT_JOB_NOT_FOUND", "export job not found", {"job_id": job_id}
+        )
+    return OperationResponse(
+        status="accepted", resource_id=job_id, message="Export cancellation accepted."
+    )
 
 
 @router.get("/settings/persona", response_model=PersonaSettings, tags=["Settings"])

backend/app/services/coordination.py

@@ -1,7 +1,14 @@
 import asyncio
 from functools import wraps
+from weakref import WeakKeyDictionary
 
-_vault_mutation_lock = asyncio.Lock()
+_vault_locks = WeakKeyDictionary()
+
+
+def vault_mutation_lock():
+    # Service/test lifecycle restarts must not reuse a lock bound to a closed loop.
+    loop = asyncio.get_running_loop()
+    return _vault_locks.setdefault(loop, asyncio.Lock())
 
 
 def serialized_vault_mutation(operation):
@@ -9,7 +16,7 @@ def serialized_vault_mutation(operation):
 
     @wraps(operation)
     async def wrapped(*args, **kwargs):
-        async with _vault_mutation_lock:
+        async with vault_mutation_lock():
             return await operation(*args, **kwargs)
 
     return wrapped

backend/app/services/index_service.py

@@ -4,6 +4,7 @@ from __future__ import annotations
 
 import asyncio
 import logging
+from app.operation_logs import log_event
 
 from datetime import datetime, timezone
 from pathlib import Path
@@ -16,7 +17,7 @@ from app.errors import ApiError
 from app.knowledge.parser import parse_note
 from app.services.note_service import index_note, prepare_note_index
 from app.database.db import connect, transaction
-from app.services.coordination import _vault_mutation_lock
+from app.services.coordination import vault_mutation_lock
 from app.retrieval.vectorstore import SqliteVecStore
 from app.local_models.runtime import LocalEmbedding
 from app.services import note_service
@@ -25,6 +26,7 @@ vector_store = SqliteVecStore()
 
 _jobs: dict[str, IndexJob] = {}
 _active_job_id: str | None = None
+_active_scope: str | None = None
 _last_completed_at: datetime | None = None
 _last_error: str | None = None
 MAX_JOBS = 100
@@ -33,6 +35,7 @@ _logger = logging.getLogger(__name__)
 
 
 def _remember_job(job: IndexJob) -> None:
+    log_event('vectors', 'index.' + job.status, job_id=job.job_id, status=job.status)
     _jobs[job.job_id] = job
     while len(_jobs) > MAX_JOBS:
         oldest = next(iter(_jobs))
@@ -64,7 +67,7 @@ def _scan_vault() -> list[tuple[str, str, str, datetime, datetime]]:
 
 
 async def rebuild(request: IndexRebuildRequest) -> IndexJob:
-    global _active_job_id, _last_completed_at, _last_error
+    global _active_job_id, _active_scope, _last_completed_at, _last_error
     if _active_job_id is not None:
         raise ApiError(409, "INDEX_BUSY", "索引正在后台计算，请稍后重试。")
     job_id = "job_" + uuid4().hex[:12]
@@ -82,6 +85,7 @@ async def rebuild(request: IndexRebuildRequest) -> IndexJob:
     saved_paths = {record.file_path: record for record in saved_records.values() if record is not None}
 
     _active_job_id = job_id
+    _active_scope = 'all'
     _last_error = None
     _remember_job(IndexJob(
         job_id=job_id, status="running", scope=request.scope,
@@ -112,7 +116,7 @@ async def rebuild(request: IndexRebuildRequest) -> IndexJob:
             prepared_notes.append((parsed, prepared))
         # All network/model awaits precede the transaction. The concrete SQLite
         # methods below complete synchronously despite their async interfaces.
-        async with _vault_mutation_lock:
+        async with vault_mutation_lock():
             if _scan_vault() != docs or saved_records != {key: repository.get_note_record(key) for key in _pending_notes()}:
                 raise ApiError(409, "INDEX_SNAPSHOT_CHANGED", "笔记在计算期间发生变化，稍后重新计算。")
             conn = connect()
@@ -148,6 +152,7 @@ async def rebuild(request: IndexRebuildRequest) -> IndexJob:
             finally:
                 conn.close()
     except BaseException as exc:
+        log_event('vectors', 'index.failed', level='WARNING' if isinstance(exc, asyncio.CancelledError) else 'ERROR', error=exc, job_id=job_id)
         _remember_job(IndexJob(
             job_id=job_id, status="failed", scope=request.scope,
             created_at=datetime.now(timezone.utc),
@@ -156,6 +161,7 @@ async def rebuild(request: IndexRebuildRequest) -> IndexJob:
         raise
     finally:
         _active_job_id = None
+        _active_scope = None
 
     job = IndexJob(job_id=job_id, status="completed", scope=request.scope, created_at=datetime.now(timezone.utc))
     _remember_job(job)
@@ -166,16 +172,26 @@ async def rebuild(request: IndexRebuildRequest) -> IndexJob:
 
 
 def get_status() -> IndexStatus:
+    from app.retrieval import activity
     counts = repository.stats()
-    vector_refresh_required = repository.get_index_meta().get('workspace_vectors_pending') == '1' or bool(_pending_notes())
+    workspace_pending = repository.get_index_meta().get('workspace_vectors_pending') == '1'
+    notes_pending = len(_pending_notes())
+    vector_refresh_required = workspace_pending or bool(notes_pending)
+    running = int(_active_job_id is not None)
+    # An entire-vault rebuild is one job, not one job per block/note.
+    pending = 1 if running and _active_scope == 'all' else (1 + running if workspace_pending else max(notes_pending, running))
+    activity_fields = dict(running_jobs=running, active_searches=activity.active,
+                           completed_searches=activity.completed, failed_searches=activity.failed,
+                           cancelled_searches=activity.cancelled)
     if _active_job_id is not None:
-        return IndexStatus(status="running", pending_jobs=0, active_job_id=_active_job_id, vector_refresh_required=vector_refresh_required,
+        return IndexStatus(**activity_fields, status="running", pending_jobs=pending, active_job_id=_active_job_id, vector_refresh_required=vector_refresh_required,
                            total_notes=counts["notes"], total_blocks=counts["blocks"])
     return IndexStatus(
+        **activity_fields,
         vector_refresh_required=vector_refresh_required,
         total_notes=counts["notes"], total_blocks=counts["blocks"],
         status="failed" if _last_error else "idle",
-        pending_jobs=0,
+        pending_jobs=pending,
         last_completed_at=_last_completed_at,
         error_message=_last_error,
     )
@@ -227,7 +243,7 @@ def _pending_notes() -> list[str]:
 
 
 async def _refresh_saved_note(note_id: str) -> None:
-    global _active_job_id, _last_error, _last_completed_at
+    global _active_job_id, _active_scope, _last_error, _last_completed_at
     record = repository.get_note_record(note_id)
     key = f'note_vectors_pending:{note_id}'
     if record is None:
@@ -240,13 +256,14 @@ async def _refresh_saved_note(note_id: str) -> None:
     parsed.title = record.title
     job_id = 'job_' + uuid4().hex[:12]
     _active_job_id = job_id
+    _active_scope = 'note'
     _last_error = None
     _remember_job(IndexJob(job_id=job_id, status='running', scope='all', created_at=datetime.now(timezone.utc)))
     try:
         prepared = await prepare_note_index(parsed, strict=True)
         if isinstance(note_service.embedding, LocalEmbedding) and parsed.blocks and prepared[1] is None:
             raise ApiError(503, "EMBEDDING_UNAVAILABLE", "笔记已保存，后台向量计算未完成。")
-        async with _vault_mutation_lock:
+        async with vault_mutation_lock():
             current = repository.get_note_record(note_id)
             if current != record or note_service._read_markdown(record.file_path) != markdown:
                 # Another save or rename won the race; leave the durable queue entry intact.
@@ -254,6 +271,14 @@ async def _refresh_saved_note(note_id: str) -> None:
             conn = connect()
             try:
                 with transaction(conn):
+                    existing_ids = {row[0] for row in conn.execute('SELECT block_id FROM blocks WHERE note_id=?', (note_id,))}
+                    if existing_ids != {block.block_id for block in parsed.blocks}:
+                        # An external editor changed a newly registered note while inference ran.
+                        # Reconcile that note only; the snapshot check above protects newer saves.
+                        parsed.title = parse_note(markdown=markdown, file_path=record.file_path,
+                            folder=record.folder, tags=record.tags, created_at=record.created_at,
+                            updated_at=record.updated_at, note_id=note_id).title
+                        await index_note(parsed, prepared=prepared, conn=conn)
                     # Write only vectors: metadata and FTS already represent the saved revision.
                     vectors, remote = prepared
                     from app.retrieval.vectorstore import VectorRecord
@@ -261,14 +286,24 @@ async def _refresh_saved_note(note_id: str) -> None:
                     await vector_store.upsert([VectorRecord(id=b.block_id, vector=v)
                         for b, v in zip(parsed.blocks, vectors)], conn=conn)
                     routed_vectors.store_remote(conn, [b.block_id for b in parsed.blocks], remote)
+                    if isinstance(note_service.embedding, LocalEmbedding) and parsed.blocks:
+                        from app.retrieval.space_index import table_name
+                        if remote is None:
+                            raise ApiError(503, 'EMBEDDING_UNAVAILABLE', '笔记已保存，向量计算未完成。')
+                        table = table_name(remote.space_id, remote.dimensions)
+                        missing = conn.execute(f'SELECT 1 FROM blocks b LEFT JOIN {table} v ON v.block_id=b.block_id WHERE b.note_id=? AND v.block_id IS NULL LIMIT 1', (note_id,)).fetchone()
+                        if missing:
+                            raise ApiError(500, 'SEMANTIC_INDEX_WRITE_FAILED', '向量写入未完成，保留待处理标记。')
                     repository.set_index_meta({key: '0'}, conn=conn)
             finally:
                 conn.close()
         _last_completed_at = datetime.now(timezone.utc)
         _remember_job(IndexJob(job_id=job_id, status='completed', scope='all', created_at=_last_completed_at))
     except BaseException as exc:
+        log_event('vectors', 'index.failed', level='WARNING' if isinstance(exc, asyncio.CancelledError) else 'ERROR', error=exc, job_id=job_id)
         _last_error = str(exc) or '后台向量计算已中断，笔记已保存。'
         _remember_job(IndexJob(job_id=job_id, status='failed', scope='all', created_at=datetime.now(timezone.utc)))
         raise
     finally:
         _active_job_id = None
+        _active_scope = None

backend/app/services/model_diagnostics.py

@@ -19,6 +19,13 @@ def connection():
 
 
 def record(**values):
+    from app.operation_logs import log_event
+    log_event('models', 'model.' + str(values.get('operation', 'inference')),
+              level='ERROR' if values.get('status') == 'failed' else 'WARNING' if values.get('status') == 'fallback' else 'INFO',
+              model=values.get('model'), source=values.get('source'), status=values.get('status'),
+              device=values.get('actual_device') or values.get('attempted_device'),
+              error_code=values.get('error_code'), fallback=values.get('fallback_reason'),
+              duration_ms=round(values.get('elapsed_seconds', 0) * 1000, 2))
     safe = {key: value[:240] for key, value in values.items() if key in TEXT and isinstance(value, str)}
     safe.update({key: value for key, value in values.items()
                  if key in NUMBERS and type(value) in (float, int) and math.isfinite(value) and value >= 0})

backend/app/services/task_service.py

@@ -2,11 +2,37 @@ from __future__ import annotations
 
 from datetime import datetime, timezone
 from uuid import uuid4
+import asyncio
+from contextvars import copy_context
+from functools import partial
+from weakref import WeakKeyDictionary
 
 from app import repository
 from app.contracts import Task, TaskStatus
 from app.database.db import connect, transaction
 from app.errors import ApiError
+from app.operation_logs import log_event
+
+_write_locks = WeakKeyDictionary()
+
+
+async def write_in_background(operation, *args, **kwargs):
+    # SQLite has one writer. Queue cooperatively instead of letting many worker
+    # threads fight over the file lock and starve unrelated model work.
+    loop = asyncio.get_running_loop()
+    lock = _write_locks.setdefault(loop, asyncio.Lock())
+    async with lock:
+        work = loop.run_in_executor(None, copy_context().run, partial(operation, *args, **kwargs))
+        cancelled = False
+        while not work.done():
+            try:
+                await asyncio.shield(work)
+            except asyncio.CancelledError:
+                cancelled = True
+        result = work.result()
+        if cancelled:
+            raise asyncio.CancelledError
+        return result
 
 
 def _now() -> datetime:
@@ -49,6 +75,7 @@ def create_task(
                 ),
             )
         row = conn.execute("SELECT * FROM tasks WHERE task_id = ?", (task_id,)).fetchone()
+        log_event('tasks', 'task.created', task_id=task_id, note_id=note_id, status='todo')
         return _task_from_row(row)
     finally:
         conn.close()
@@ -111,6 +138,7 @@ def update_task(task_id: str, values: dict[str, object]) -> Task:
                 params,
             )
         row = conn.execute("SELECT * FROM tasks WHERE task_id = ?", (task_id,)).fetchone()
+        log_event('tasks', 'task.updated', task_id=task_id, status=row['status'], changed_fields=','.join(values))
         return _task_from_row(row)
     finally:
         conn.close()
@@ -121,6 +149,7 @@ def delete_task(task_id: str) -> bool:
     try:
         with transaction(conn):
             cursor = conn.execute("DELETE FROM tasks WHERE task_id = ?", (task_id,))
+        log_event('tasks', 'task.deleted' if cursor.rowcount else 'task.not_found', task_id=task_id)
         return cursor.rowcount > 0
     finally:
         conn.close()

backend/app/services/usage_service.py

@@ -98,6 +98,11 @@ class UsageAttempt:
                     reasoning_tokens=first("output_tokens_details.reasoning_tokens", "completion_tokens_details.reasoning_tokens"))
 
     def persist(self):
+        from app.operation_logs import log_event
+        log_event('providers', 'model.request_finished', level='INFO' if self.completed else 'WARNING',
+                  provider_id=self.provider_id, model=self.model, run_id=self.run_id,
+                  request_id=self.request_id, source=self.source,
+                  status='completed' if self.completed else 'incomplete')
         try:
             with closing(connection()) as conn:
                 conn.execute("INSERT OR REPLACE INTO model_usage VALUES (?,?,?,?,?,?,?,?,?,?,?)", (

backend/app/services/workspace_service.py

@@ -105,6 +105,14 @@ def get_workspace_tree() -> list[WorkspaceEntry]:
     return _tree(get_settings().vault_path.resolve(), locations)
 
 
+async def refresh_workspace_tree() -> list[WorkspaceEntry]:
+    """Observe external creates/deletes without waiting for vector inference."""
+    if get_workspace_info().requires_refresh:
+        await _register_workspace_files()
+        index_service.schedule_workspace_rebuild()
+    return get_workspace_tree()
+
+
 async def open_workspace(requested_path: str | None) -> WorkspaceSnapshot:
     """打开只登记文件与全文索引，不让 Embedding 或厂商网络阻塞工作区。"""
 
@@ -153,7 +161,7 @@ async def _register_workspace_files() -> None:
                     created_at=parsed.created_at, updated_at=parsed.updated_at, blocks=parsed.blocks)
                 conn.execute('UPDATE blocks SET embedding_local_only=? WHERE note_id=?', (int(parsed.embedding_local_only), parsed.note_id))
             if prepared:
-                repository.set_index_meta({'workspace_vectors_pending': '1'}, conn=conn)
+                repository.set_index_meta({f'note_vectors_pending:{parsed.note_id}': '1' for parsed in prepared}, conn=conn)
     finally:
         conn.close()
 

backend/data/vault/产品/RAG 检索增强与引用定位.md

@@ -16,3 +16,5 @@ tags: RAG, 产品
 
 粗排后使用 Reranker 对候选块重新打分，提升相关性。
 
+<br />
+

backend/data/vault/功能演示/00 演示导航.md

@@ -2,7 +2,6 @@
 title: 功能演示导航
 tags: 演示, 入门
 ---
-
 # 功能演示导航
 
 这组笔记用于在真实工作区查看 Markdown、代码高亮、图表和检索效果。文中的项目、日期和数据均为演示内容。
@@ -10,12 +9,13 @@ tags: 演示, 入门
 ## 建议阅读顺序
 
 | 笔记                            | 可以查看的功能                |
-| --- | --- |
+| ----------------------------- | ---------------------- |
 | 01 Markdown 与大纲               | 元数据、标题层级、列表、引用、表格与行内代码 |
 | 02 多语言代码与公式                   | Shiki 语言配色、代码块标签、数学公式  |
 | 03 Mermaid 图表集                | 六种常用图型、主题颜色和大图查看       |
 | 04 星灯项目资料                     | 全文搜索、知识库问答与引用定位        |
 | 05 Skill 与 Plugin 操作样例        | 扩展安装、选区命令和只读笔记检查       |
+| [06 警告框与提示框](06%20警告框与提示框.md) | 类型与别名、标题、折叠、嵌套和主题配色    |
 
 ## 工作区操作
 
@@ -35,3 +35,4 @@ tags: 演示, 入门
 - [ ] 在已配置模型后进行一次带知识库检索的问答。
 
 > 上述清单供体验时自行勾选，不是自动验收结果。模型调用可能产生费用，图表与代码示例本身不会执行代码。
+

backend/data/vault/功能演示/04 星灯项目资料.md

@@ -2,7 +2,6 @@
 title: 星灯资料站项目简报
 tags: 演示, 星灯项目, 检索
 ---
-
 # 星灯资料站
 
 星灯资料站是本组演示中的虚构项目，目标是为一个读书小组建立离线可用的学习资料目录。项目代号为 ST-27。
@@ -38,3 +37,4 @@ tags: 演示, 星灯项目, 检索
 最后一个问题在本笔记中没有答案。检查回答是否说明资料不足，而不是编造负责人。其他问题可以对照正文并点击引用定位核实。
 
 > 新建笔记需要完成索引后才能参与检索。没有模型配置时，也可以先在搜索页使用项目名、代号或独特检索词查找原文。
+

backend/data/vault/功能演示/06 警告框与提示框.md

@@ -0,0 +1,150 @@
+---
+title: 警告框与提示框演示
+tags: 演示, Markdown, 警告框, 主题
+---
+
+# 警告框与提示框
+
+本页展示 GitHub 警告框和 Obsidian 提示框的类型、标题、折叠、嵌套及正文格式。打开工作区写作模式查看效果；切换源码模式查看原始语法。
+
+## 五种常用警告框
+
+> [!NOTE]
+> 记录补充信息：这份笔记中的内容都是功能演示，不会执行代码或调用模型。
+
+> [!TIP] 小技巧：快速插入
+> 点击编辑器顶部的“提示框”选择器，选择类型后替换模板内容。
+
+> [!IMPORTANT] 保存与显示状态
+> 点击标题展开或收起，只改变本次显示状态。要修改默认状态，请在源码中的类型标记后添加 `+` 或 `-`。
+
+> [!WARNING] 修改前保留原文
+> 在演示笔记中练习时，可以先复制一段内容；需要恢复时使用撤销。
+
+> [!CAUTION] 需要重点关注的说明
+> `CAUTION` 与 `WARNING` 使用同一警告配色。提示框是笔记内容，不是应用报错弹窗。
+
+## 更多类型
+
+> [!ABSTRACT] 本页摘要
+> 类型区分语义，标题说明重点，正文保留详细信息。
+
+> [!INFO] 环境信息
+> 警告框的边框、标题和背景随主题变化。
+
+> [!TODO] 待办
+> - [ ] 展开下方折叠示例。
+> - [ ] 切换深色主题。
+> - [ ] 保存后重新打开本页。
+
+> [!SUCCESS] 已完成
+> 本段展示成功状态，不代表自动测试或实际任务已经完成。
+
+> [!QUESTION] 可以嵌套吗？
+> 可以。增加一级引用符号即可在提示框中嵌入另一个提示框。
+
+> [!FAILURE] 未达到预期
+> 示例：资料中缺少日期，需要补充后再归档。
+
+> [!DANGER] 风险提示
+> 示例：不要把唯一一份原始资料直接覆盖为整理结果。
+
+> [!BUG] 问题记录
+> 示例：发现显示异常时，记录主题、操作步骤和对应 Markdown 源码。
+
+> [!EXAMPLE] 示例
+> 将提示内容写成一句明确的说明，比只写“注意”更容易理解。
+
+> [!QUOTE] 摘录
+> 一条笔记既要保留结论，也要保留形成结论的依据。
+
+## 默认展开与默认折叠
+
+> [!TIP]+ 默认展开：点击标题试试
+> 类型后的 `+` 表示默认展开。点击标题可收起，再次点击可展开。
+
+> [!WARNING]- 默认折叠：点击查看内容
+> 你已经展开了这段说明。类型后的 `-` 表示重新渲染时默认收起。
+>
+> 正文可以包含 **加粗**、*斜体*、~~删除线~~ 和 `行内代码`。
+
+## 嵌套与混合格式
+
+> [!INFO]+ 一次资料整理
+> 先整理来源，再检查缺漏。
+>
+> 1. 收集原始资料。
+> 2. 按主题分组。
+> 3. 为尚未确认的内容添加说明。
+>
+> > [!SUCCESS] 已收集
+> > 原始笔记、会议纪要和参考链接已放入同一文件夹。
+>
+> > [!WARNING]- 尚待确认
+> > 一条资料缺少发布日期，需要补充来源。
+>
+> | 项目 | 状态 |
+> | --- | --- |
+> | 原始资料 | 已归档 |
+> | 日期核对 | 待补充 |
+>
+> ```python
+> notes = ["原始资料", "整理结果"]
+> print(len(notes))
+> ```
+>
+> 行内公式：$a^2 + b^2 = c^2$。
+
+## 类型别名
+
+别名不区分大小写。下面的表格列出兼容关系。
+
+| 类型 | 别名 |
+| --- | --- |
+| abstract | summary、tldr |
+| tip | hint |
+| success | check、done |
+| question | help、faq |
+| warning | caution、attention |
+| failure | fail、missing |
+| danger | error |
+| quote | cite |
+
+> [!summary] 摘要别名
+> 这段使用 `summary`，外观与 `abstract` 一致。
+
+> [!check] 成功别名
+> 这段使用 `check`，外观与 `success` 一致。
+
+> [!custom-demo] 未知类型的回退
+> 自定义类型暂时使用 note 外观，源文件中的类型名仍然保留。
+
+## 语法对照
+
+以下围栏中的内容应当保持为代码，不渲染成警告框。
+
+```markdown
+> [!NOTE] 自定义标题
+> 正文内容。
+
+> [!WARNING]- 默认折叠
+> 点击标题查看正文。
+
+> [!TIP]+ 默认展开
+> 默认可见的正文。
+```
+
+普通行内代码也保持原样：`[!WARNING]`。
+
+> 这是一段普通引用，没有提示类型标记，因此不应显示为警告框。
+
+## 主题与保存体验清单
+
+- [ ] 在浅色、深色、护眼主题下区分信息、成功、警告与危险颜色。
+- [ ] 使用纸间时光，查看纸张虚线边框和嵌套层次。
+- [ ] 使用 Ocean Blue 与 Midnight Purple，检查标题和正文是否清晰。
+- [ ] 点击折叠标题，并使用 Tab、Enter 或空格体验键盘操作。
+- [ ] 在源码模式修改一个类型或标题，再切回写作模式。
+- [ ] 保存并重新打开，确认类型、标题、正文与默认折叠状态保持一致。
+
+这是一份手动体验清单，未勾选不表示功能失败。桌面容器的原生格式快捷键与元数据转换仍属于第三阶段规划。

backend/data/vault/渲染压测/01 渲染压测-2.56万字.md

@@ -0,0 +1,958 @@
+# 长文渲染压力测试
+
+## 第 1 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 1
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 2 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 2
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 3 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 3
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 4 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 4
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 5 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 5
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 6 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 6
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 7 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 7
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 8 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 8
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+> [!TIP] 验收提示
+> 内容需要保留，折叠后仍可展开。
+
+| 项目 | 状态 |
+| --- | --- |
+| 渲染 | 待验证 |
+
+```javascript
+const note = { title: "长文测试", ready: true };
+console.log(note);
+```
+
+## 第 9 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 9
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 10 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 10
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 11 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 11
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 12 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 12
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 13 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 13
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 14 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 14
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 15 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 15
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 16 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 16
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+> [!TIP] 验收提示
+> 内容需要保留，折叠后仍可展开。
+
+| 项目 | 状态 |
+| --- | --- |
+| 渲染 | 待验证 |
+
+```javascript
+const note = { title: "长文测试", ready: true };
+console.log(note);
+```
+
+## 第 17 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 17
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 18 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 18
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 19 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 19
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 20 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 20
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 21 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 21
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 22 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 22
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 23 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 23
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 24 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 24
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+> [!TIP] 验收提示
+> 内容需要保留，折叠后仍可展开。
+
+| 项目 | 状态 |
+| --- | --- |
+| 渲染 | 待验证 |
+
+```javascript
+const note = { title: "长文测试", ready: true };
+console.log(note);
+```
+
+## 第 25 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 25
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 26 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 26
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 27 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 27
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 28 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 28
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 29 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 29
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 30 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 30
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 31 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 31
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 32 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 32
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+> [!TIP] 验收提示
+> 内容需要保留，折叠后仍可展开。
+
+| 项目 | 状态 |
+| --- | --- |
+| 渲染 | 待验证 |
+
+```javascript
+const note = { title: "长文测试", ready: true };
+console.log(note);
+```
+
+## 第 33 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 33
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 34 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 34
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 35 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 35
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 36 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 36
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 37 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 37
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 38 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 38
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 39 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 39
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 40 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 40
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+> [!TIP] 验收提示
+> 内容需要保留，折叠后仍可展开。
+
+| 项目 | 状态 |
+| --- | --- |
+| 渲染 | 待验证 |
+
+```javascript
+const note = { title: "长文测试", ready: true };
+console.log(note);
+```
+
+## 第 41 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 41
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 42 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 42
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 43 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 43
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 44 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 44
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 45 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 45
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 46 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 46
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 47 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 47
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 48 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 48
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+> [!TIP] 验收提示
+> 内容需要保留，折叠后仍可展开。
+
+| 项目 | 状态 |
+| --- | --- |
+| 渲染 | 待验证 |
+
+```javascript
+const note = { title: "长文测试", ready: true };
+console.log(note);
+```
+
+## 第 49 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 49
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 50 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 50
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 51 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 51
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 52 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 52
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 53 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 53
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 54 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 54
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 55 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 55
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 56 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 56
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+> [!TIP] 验收提示
+> 内容需要保留，折叠后仍可展开。
+
+| 项目 | 状态 |
+| --- | --- |
+| 渲染 | 待验证 |
+
+```javascript
+const note = { title: "长文测试", ready: true };
+console.log(note);
+```
+
+## 第 57 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 57
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 58 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 58
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 59 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 59
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 60 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 60
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 61 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 61
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 62 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 62
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 63 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 63
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 64 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 64
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+> [!TIP] 验收提示
+> 内容需要保留，折叠后仍可展开。
+
+| 项目 | 状态 |
+| --- | --- |
+| 渲染 | 待验证 |
+
+```javascript
+const note = { title: "长文测试", ready: true };
+console.log(note);
+```
+
+## 第 65 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 65
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 66 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 66
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 67 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 67
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 68 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 68
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 69 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 69
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 70 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 70
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 71 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 71
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 72 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 72
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+> [!TIP] 验收提示
+> 内容需要保留，折叠后仍可展开。
+
+| 项目 | 状态 |
+| --- | --- |
+| 渲染 | 待验证 |
+
+```javascript
+const note = { title: "长文测试", ready: true };
+console.log(note);
+```
+
+## 第 73 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 73
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 74 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 74
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 75 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 75
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 76 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 76
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 77 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 77
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 78 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 78
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 79 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 79
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 80 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 80
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+> [!TIP] 验收提示
+> 内容需要保留，折叠后仍可展开。
+
+| 项目 | 状态 |
+| --- | --- |
+| 渲染 | 待验证 |
+
+```javascript
+const note = { title: "长文测试", ready: true };
+console.log(note);
+```
+
+## 第 81 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 81
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 82 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 82
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 83 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 83
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 84 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 84
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 85 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 85
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 86 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 86
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 87 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 87
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 88 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 88
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+> [!TIP] 验收提示
+> 内容需要保留，折叠后仍可展开。
+
+| 项目 | 状态 |
+| --- | --- |
+| 渲染 | 待验证 |
+
+```javascript
+const note = { title: "长文测试", ready: true };
+console.log(note);
+```
+
+## 第 89 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 89
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 90 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 90
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 91 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 91
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 92 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 92
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 93 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 93
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 94 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 94
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 95 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 95
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 96 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 96
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+> [!TIP] 验收提示
+> 内容需要保留，折叠后仍可展开。
+
+| 项目 | 状态 |
+| --- | --- |
+| 渲染 | 待验证 |
+
+```javascript
+const note = { title: "长文测试", ready: true };
+console.log(note);
+```
+
+## 第 97 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 97
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 98 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 98
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 99 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 99
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 100 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 100
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+## 第 101 节：知识整理
+
+本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。本地知识库保存课程记录与项目思考，编辑时需要稳定响应。长篇文档包含章节结构和引用信息，阅读过程中可以随时折叠展开。这里使用生成的测试内容验证渲染性能，不读取真实笔记。
+
+### 小结 101
+
+重点包含 **强调文字**、`inlineCode` 和 [链接](https://example.com)。
+
+
+## 文末校验
+
+结束标记：长文内容完整。

backend/pyproject.toml

@@ -9,8 +9,11 @@ dependencies = [
     "fastapi>=0.116,<1.0",
     "httpx>=0.28,<1.0",
     "jsonschema>=4.25,<5.0",
+    "mistune>=3.0,<4.0",
+    "python-docx>=1.1,<2.0",
     "pyyaml>=6.0,<7.0",
     "referencing>=0.36,<1.0",
+    "reportlab>=4.0,<5.0",
     "sqlite-vec>=0.1.9",
     "uvicorn[standard]>=0.35,<1.0",
 ]

backend/scripts/agent-task-stress.py

@@ -0,0 +1,250 @@
+"""Offline Agent/runtime and task API load test; all state lives in a temporary directory."""
+from __future__ import annotations
+
+import argparse
+import asyncio
+import json
+import inspect
+import math
+import os
+import pathlib
+import platform
+import sys
+import tempfile
+import time
+
+sys.path.insert(0, str(pathlib.Path(__file__).resolve().parents[1]))
+
+
+def stats(values):
+    values = sorted(values)
+    return {"count": len(values), "median_ms": round(values[len(values)//2], 2),
+            "p95_ms": round(values[min(len(values)-1, math.ceil(len(values)*.95)-1)], 2),
+            "max_ms": round(values[-1], 2)} if values else {"count": 0}
+
+
+async def main(output):
+    # Set before importing any app modules: container has import-time initialization.
+    with tempfile.TemporaryDirectory(prefix="notes-agent-task-stress-") as directory:
+        root = pathlib.Path(directory)
+        os.environ.update(APP_DATA_DIR=str(root / 'data'), APP_DB_PATH=str(root / 'app.db'),
+                          APP_VAULT_PATH=str(root / 'vault'))
+        from app.container import container
+        from app.contracts import AgentRunCreateRequest, AgentRunStatus
+        from app.agent.runtime import AgentRuntime, AgentCapacityError
+        from app.agent.permissions import PermissionMode
+        from app.main import app
+        import httpx
+
+        report = {"python": platform.python_version(), "platform": platform.platform(),
+                  "provider": "mock with 50 ms injected delay per model turn; no network", "results": []}
+
+        def save(name, value):
+            report['results'].append({"scenario": name, **value})
+            output.write_text(json.dumps(report, ensure_ascii=False, indent=2), encoding='utf-8')
+            print(json.dumps(report['results'][-1], ensure_ascii=False), flush=True)
+
+        async def measured(operation):
+            delays = []
+            async def heartbeat():
+                while True:
+                    start = time.perf_counter()
+                    await asyncio.sleep(.01)
+                    delays.append(max(0, (time.perf_counter()-start)*1000-10))
+            pulse = asyncio.create_task(heartbeat())
+            await asyncio.sleep(0)
+            start = time.perf_counter()
+            try:
+                result = await operation()
+                await asyncio.sleep(.02)
+                return {**result, "elapsed_ms": round((time.perf_counter()-start)*1000, 2),
+                        "event_loop_lag": stats(delays)}
+            finally:
+                pulse.cancel()
+                await asyncio.gather(pulse, return_exceptions=True)
+
+        adapter = container.providers.get('mock').adapter
+        original = adapter.complete
+        async def delayed(request):
+            await asyncio.sleep(.05)
+            return await original(request)
+        adapter.complete = delayed
+        runtime = container.agent
+
+        for concurrency in (1, 10, 50, 200):
+            async def batch():
+                durations, sequences, statuses = [], [], []
+                semaphore = asyncio.Semaphore(concurrency)
+                async def one(index):
+                    async with semaphore:
+                        start = time.perf_counter()
+                        created = await runtime.create_run(AgentRunCreateRequest(
+                            input=f'/tool system.echo {{"text":"pressure-{index}"}}',
+                            provider_id='mock', model='mock-1', allowed_tools=['system.echo']))
+                        events = [event async for event in runtime.events(created.run_id)]
+                        done = await runtime.wait(created.run_id)
+                        durations.append((time.perf_counter()-start)*1000)
+                        statuses.append(done.status.value)
+                        sequence = [event.sequence for event in events]
+                        sequences.append(sequence == list(range(len(sequence))))
+                        assert done.status == AgentRunStatus.completed
+                        assert done.tool_results[0].output == {"text": f"pressure-{index}"}
+                        replay = [event.sequence async for event in runtime.events(created.run_id, after_sequence=2)]
+                        assert replay == sequence[3:]
+                        return created.run_id
+                ids = await asyncio.gather(*(one(i) for i in range(max(20, concurrency))))
+                assert all(sequences)
+                recovered = AgentRuntime(container.providers, container.tools, container.permissions,
+                                         trace_repository=runtime.trace_repository)
+                assert all(recovered.get_run(run_id).status == AgentRunStatus.completed for run_id in ids)
+                assert not any(record.subscribers for record in runtime._records.values())
+                return {"concurrency": concurrency, "runs": len(ids), "latency": stats(durations),
+                        "completed": statuses.count('completed'), "ordered_events_and_replay": True,
+                        "terminal_recovery": True, "retained_records": len(runtime._records)}
+            save('agent_tool_runs', await measured(batch))
+
+        # Hold model calls so all 200 records remain active while testing admission.
+        gate = asyncio.Event()
+        async def blocked(request):
+            await gate.wait()
+            return await original(request)
+        adapter.complete = blocked
+        async def capacity():
+            ids = [(await runtime.create_run(AgentRunCreateRequest(input='capacity', provider_id='mock', model='mock-1'))).run_id for _ in range(200)]
+            rejected = False
+            try:
+                await runtime.create_run(AgentRunCreateRequest(input='overflow', provider_id='mock', model='mock-1'))
+            except AgentCapacityError:
+                rejected = True
+            await asyncio.sleep(0)
+            latencies = []
+            for run_id in ids:
+                start = time.perf_counter()
+                await runtime.cancel(run_id)
+                latencies.append((time.perf_counter()-start)*1000)
+            states = await asyncio.gather(*(runtime.wait(run_id) for run_id in ids))
+            assert rejected and all(run.status == AgentRunStatus.cancelled for run in states)
+            assert all(not record.task or record.task.done() for record in runtime._records.values())
+            return {"active_limit": 200, "overflow_rejected": rejected, "cancelled": len(states), "cancel_latency": stats(latencies)}
+        save('capacity_and_cancel', await measured(capacity))
+        adapter.complete = delayed
+
+        async def permissions():
+            tool = container.tools.get('system.echo')
+            previous = tool.definition.permission
+            tool.definition.permission = 'stress.confirm'
+            container.permissions.policy.set_rule('stress.confirm', PermissionMode.confirm)
+            async def one(index):
+                created = await runtime.create_run(AgentRunCreateRequest(input='/tool system.echo {"text":"permission"}',
+                    provider_id='mock', model='mock-1', allowed_tools=['system.echo'], tool_timeout_seconds=30))
+                stream = runtime.events(created.run_id)
+                try:
+                    async for event in stream:
+                        if event.event.value == 'PermissionRequired':
+                            if index % 2: await runtime.cancel(created.run_id)
+                            else: assert await runtime.resolve_permission(created.run_id, str(event.data['request_id']), 'allow')
+                            break
+                finally:
+                    await stream.aclose()
+                return (await runtime.wait(created.run_id)).status.value
+            try:
+                states = await asyncio.wait_for(asyncio.gather(*(one(i) for i in range(20))), 60)
+                assert states.count('completed') == states.count('cancelled') == 10
+                assert not any(record.subscribers for record in runtime._records.values())
+                return {"runs": 20, "approved_completed": 10, "cancelled_waiting_permission": 10, "subscribers_released": True}
+            finally:
+                tool.definition.permission = previous
+        save('permission_wait', await measured(permissions))
+
+        async def failures():
+            active = 0
+            async def injected(request):
+                text = request.messages[-1].content
+                if text == 'inject-provider-error': raise RuntimeError('injected offline provider failure')
+                if text == 'inject-model-timeout': await asyncio.sleep(60)
+                return await delayed(request)
+            tool = container.tools.get('system.echo')
+            executor = tool.executor
+            async def slow_tool(arguments, context):
+                nonlocal active
+                active += 1
+                try:
+                    if arguments.text == 'slow': await asyncio.sleep(60)
+                    value = executor(arguments, context)
+                    return await value if inspect.isawaitable(value) else value
+                finally: active -= 1
+            adapter.complete = injected
+            tool.executor = slow_tool
+            async def one(index):
+                mode = index % 4
+                text = ['normal', 'inject-provider-error', 'inject-model-timeout', '/tool system.echo {"text":"slow"}'][mode]
+                created = await runtime.create_run(AgentRunCreateRequest(input=text, provider_id='mock', model='mock-1',
+                    allowed_tools=['system.echo'], run_timeout_seconds=1 if mode == 2 else 30, tool_timeout_seconds=1))
+                result = await runtime.wait(created.run_id)
+                if mode == 0: assert result.status == AgentRunStatus.completed
+                elif mode == 1: assert result.status == AgentRunStatus.failed and result.error_code == 'AGENT_FAILED'
+                elif mode == 2: assert result.status == AgentRunStatus.failed and result.error_code == 'AGENT_TIMEOUT'
+                else: assert result.tool_results[0].error_code == 'TOOL_TIMEOUT'
+            try:
+                await asyncio.wait_for(asyncio.gather(*(one(i) for i in range(20))), 45)
+                assert active == 0
+                return {"runs": 20, "success": 5, "provider_errors": 5, "model_timeouts": 5,
+                        "tool_timeouts": 5, "remaining_tool_executors": active}
+            finally:
+                adapter.complete = delayed
+                tool.executor = executor
+        save('failure_and_timeout_isolation', await measured(failures))
+
+        async with httpx.AsyncClient(transport=httpx.ASGITransport(app=app), base_url='http://stress.local') as client:
+            for count in (100, 1000):
+                async def tasks():
+                    timings = {name: [] for name in ('create', 'update', 'list', 'delete')}
+                    async def call(method, path, **kwargs):
+                        start = time.perf_counter()
+                        response = await client.request(method, path, **kwargs)
+                        response.raise_for_status()
+                        return response.json(), (time.perf_counter()-start)*1000
+                    semaphore = asyncio.Semaphore(20)
+                    async def create(index):
+                        async with semaphore:
+                            body, duration = await call('POST', '/api/tasks', json={'title': f'压测任务 {index}', 'description': '独立测试数据'})
+                            timings['create'].append(duration)
+                            return body['task_id']
+                    ids = await asyncio.gather(*(create(i) for i in range(count)))
+                    first, _ = await call('GET', '/api/tasks')
+                    seen = []
+                    for offset in range(0, count, 100):
+                        body, duration = await call('GET', f'/api/tasks?limit=100&offset={offset}')
+                        timings['list'].append(duration)
+                        seen.extend(item['task_id'] for item in body['items'])
+                    assert len(set(seen)) == count and set(seen) == set(ids)
+                    async def change(run_id):
+                        async with semaphore:
+                            body, duration = await call('PATCH', f'/api/tasks/{run_id}', json={'status': 'done'})
+                            assert body['status'] == 'done'
+                            timings['update'].append(duration)
+                            _, duration = await call('DELETE', f'/api/tasks/{run_id}')
+                            timings['delete'].append(duration)
+                    await asyncio.gather(*(change(run_id) for run_id in ids))
+                    final, _ = await call('GET', '/api/tasks')
+                    assert final['page']['total'] == 0
+                    return {"tasks": count, "client_concurrency": 20, "latencies": {key: stats(value) for key, value in timings.items()},
+                            "default_page_count": len(first['items']), "default_total": first['page']['total'],
+                            "pagination_complete": True, "final_total": 0}
+                save('task_api_crud', await measured(tasks))
+
+        report['database_bytes'] = (root / 'app.db').stat().st_size
+        report['complete'] = True
+        output.write_text(json.dumps(report, ensure_ascii=False, indent=2), encoding='utf-8')
+        container.plugins.shutdown()
+        container.mcp_servers.shutdown()
+        from app.operation_logs import shutdown_logging
+        await asyncio.to_thread(shutdown_logging)
+
+
+if __name__ == '__main__':
+    parser = argparse.ArgumentParser()
+    parser.add_argument('--output', type=pathlib.Path, required=True)
+    args = parser.parse_args()
+    args.output.parent.mkdir(parents=True, exist_ok=True)
+    asyncio.run(main(args.output))

backend/scripts/task-http-stress.py

@@ -0,0 +1,96 @@
+"""Real loopback HTTP task load with a separate, temporary Uvicorn process."""
+import argparse
+import asyncio
+import json
+import math
+import os
+from pathlib import Path
+import socket
+import subprocess
+import sys
+import tempfile
+from time import perf_counter
+
+import httpx
+
+
+def stats(values):
+    values = sorted(values)
+    return {'count': len(values), 'p95_ms': round(values[math.ceil(len(values)*.95)-1], 2),
+            'max_ms': round(values[-1], 2)} if values else {'count': 0}
+
+
+async def main(args):
+    with tempfile.TemporaryDirectory(prefix='notes-task-http-') as directory:
+        root = Path(directory)
+        env = {**os.environ, 'APP_DATA_DIR': str(root/'data'), 'APP_DB_PATH': str(root/'app.db'), 'APP_VAULT_PATH': str(root/'vault')}
+        with socket.socket() as sock:
+            sock.bind(('127.0.0.1', 0)); port = sock.getsockname()[1]
+        process = subprocess.Popen([sys.executable, '-m', 'uvicorn', 'app.main:app', '--host', '127.0.0.1', '--port', str(port), '--log-level', 'error'],
+            cwd=Path(__file__).resolve().parents[1], env=env, stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL,
+            creationflags=subprocess.CREATE_NO_WINDOW if os.name == 'nt' else 0)
+        try:
+            async with httpx.AsyncClient(base_url=f'http://127.0.0.1:{port}', timeout=30) as client:
+                for _ in range(150):
+                    if process.poll() is not None: raise RuntimeError('Isolated Uvicorn exited')
+                    try:
+                        (await client.get('/health')).raise_for_status(); break
+                    except httpx.HTTPError: await asyncio.sleep(.1)
+                else: raise TimeoutError('Isolated Uvicorn startup')
+                sem = asyncio.Semaphore(args.concurrency)
+                timings = {key: [] for key in ('create', 'update', 'list', 'delete', 'health')}
+                errors = []
+                async def request(method, path, kind, **kwargs):
+                    start = perf_counter()
+                    response = await client.request(method, path, **kwargs)
+                    timings[kind].append((perf_counter()-start)*1000)
+                    response.raise_for_status()
+                    return response.json()
+                async def health():
+                    while True:
+                        try: await request('GET', '/health', 'health')
+                        except httpx.HTTPError as error: errors.append(type(error).__name__)
+                        await asyncio.sleep(.05)
+                heartbeat = asyncio.create_task(health())
+                start = perf_counter()
+                try:
+                    async def create(index):
+                        async with sem:
+                            return (await request('POST', '/api/tasks', 'create', json={'title': f'HTTP 压测 {index}'}))['task_id']
+                    ids = await asyncio.gather(*(create(i) for i in range(args.count)))
+                    seen = []
+                    for offset in range(0, args.count, 100):
+                        page = await request('GET', f'/api/tasks?limit=100&offset={offset}', 'list')
+                        seen.extend(item['task_id'] for item in page['items'])
+                    assert set(seen) == set(ids) and len(seen) == args.count
+                    async def change(task_id):
+                        async with sem:
+                            updated = await request('PATCH', f'/api/tasks/{task_id}', 'update', json={'status': 'done'})
+                            assert updated['status'] == 'done'
+                            await request('DELETE', f'/api/tasks/{task_id}', 'delete')
+                    await asyncio.gather(*(change(task_id) for task_id in ids))
+                    remaining = await request('GET', '/api/tasks', 'list')
+                    assert remaining['page']['total'] == 0
+                finally:
+                    heartbeat.cancel(); await asyncio.gather(heartbeat, return_exceptions=True)
+                report = {'transport': 'real loopback HTTP, separate Uvicorn process', 'tasks': args.count,
+                    'concurrency': args.concurrency, 'elapsed_ms': round((perf_counter()-start)*1000, 2),
+                    'latencies': {key: stats(value) for key,value in timings.items()}, 'health_errors': errors,
+                    'pagination_complete': True, 'final_total': 0}
+                args.output.parent.mkdir(parents=True, exist_ok=True)
+                args.output.write_text(json.dumps(report, ensure_ascii=False, indent=2), encoding='utf-8')
+                print(json.dumps(report, ensure_ascii=False))
+        finally:
+            process.terminate()
+            try: process.wait(timeout=10)
+            except subprocess.TimeoutExpired: process.kill(); process.wait()
+
+
+if __name__ == '__main__':
+    parser = argparse.ArgumentParser()
+    parser.add_argument('--output', type=Path, required=True)
+    parser.add_argument('--count', type=int, default=1000)
+    parser.add_argument('--concurrency', type=int, default=20)
+    args = parser.parse_args()
+    if args.count < 1 or args.concurrency < 1: parser.error('count and concurrency must be positive')
+    asyncio.run(main(args))

backend/scripts/vector-index-benchmark.py

@@ -0,0 +1,64 @@
+"""Synthetic, isolated exact-search comparison; does not access the user Vault."""
+import heapq
+import json
+import math
+import random
+import sqlite3
+import statistics
+import sys
+import tempfile
+import time
+from pathlib import Path
+
+import sqlite_vec
+
+sys.path.insert(0, str(Path(__file__).resolve().parents[1]))
+from app.retrieval import space_index
+from app.retrieval.routed_vectors import RemoteEmbeddings, _unit_vector
+
+
+def main():
+    rng = random.Random(42)
+    count, dimensions = 4000, 384
+    with tempfile.TemporaryDirectory(prefix='notes-vec-bench-') as temporary:
+        conn = sqlite3.connect(Path(temporary) / 'vectors.db')
+        conn.row_factory = sqlite3.Row
+        conn.enable_load_extension(True)
+        sqlite_vec.load(conn)
+        conn.enable_load_extension(False)
+        conn.execute('CREATE TABLE blocks(block_id TEXT PRIMARY KEY, embedding_local_only INTEGER)')
+        conn.execute('CREATE TABLE routed_block_vectors(space_id TEXT,block_id TEXT,dimensions INTEGER,vector TEXT,PRIMARY KEY(space_id,dimensions,block_id))')
+        vectors = [_unit_vector([rng.uniform(-1, 1) for _ in range(dimensions)], dimensions) for _ in range(count)]
+        conn.executemany('INSERT INTO blocks VALUES (?,0)', [(str(i),) for i in range(count)])
+        conn.executemany('INSERT INTO routed_block_vectors VALUES (?,?,?,?)', [('benchmark', str(i), dimensions, json.dumps(v)) for i, v in enumerate(vectors)])
+        start = time.perf_counter()
+        space_index.ensure(conn, 'benchmark', dimensions)
+        migration_ms = (time.perf_counter() - start) * 1000
+        conn.commit()
+        query = vectors[0]
+        batch = RemoteEmbeddings('benchmark', dimensions, [query])
+        def legacy():
+            def hits():
+                for row in conn.execute('SELECT block_id,vector FROM routed_block_vectors'):
+                    vector = _unit_vector(json.loads(row[1]), dimensions)
+                    yield row[0], max(0., min(1., math.fsum(a*b for a,b in zip(query,vector))))
+            return heapq.nlargest(20, hits(), key=lambda hit:hit[1])
+        def native():
+            return [(hit.id,hit.score) for hit in space_index.search(conn,batch,20)]
+        measurements = {}
+        results = {}
+        for name, operation in [('python_json_scan', legacy), ('sqlite_vec',native)]:
+            elapsed = []
+            for _ in range(5):
+                start = time.perf_counter()
+                results[name] = operation()
+                elapsed.append((time.perf_counter()-start)*1000)
+            measurements[name] = {'median_ms':statistics.median(elapsed), 'samples_ms':elapsed}
+        assert [hit[0] for hit in results['python_json_scan']] == [hit[0] for hit in results['sqlite_vec']]
+        print(json.dumps({'blocks':count,'dimensions':dimensions,'top_k':20,'migration_ms':migration_ms,
+                          'same_top_k':True,'measurements':measurements},indent=2))
+        conn.close()
+
+
+if __name__ == '__main__':
+    main()

backend/tests/test_agent_core.py

@@ -112,7 +112,7 @@ def test_permission_confirmation_resumes_agent() -> None:
                     break
 
         assert request_id is not None
-        assert container.agent.resolve_permission(
+        assert await container.agent.resolve_permission(
             created.run_id, request_id, "allow_once"
         )
         completed = await container.agent.wait(created.run_id)
@@ -370,8 +370,9 @@ def test_cancelling_permission_wait_cancels_run() -> None:
         )
 
         async with asyncio.timeout(2):
-            while container.agent.get_run(created.run_id).status != AgentRunStatus.waiting_permission:
-                await asyncio.sleep(0)
+            async for event in container.agent.events(created.run_id):
+                if event.event == AgentEventType.permission_required:
+                    break
 
         cancelled = await container.agent.cancel(created.run_id)
         await container.agent.wait(created.run_id)

backend/tests/test_export.py

@@ -0,0 +1,711 @@
+"""Export Service 的单元与端到端测试。
+
+沿用 conftest 隔离机制：APP_DATA_DIR / DB / Vault / exports 目录都落在临时目录，
+不读写真实数据。导出采用「创建即 queued + 后台 Task 执行」的异步模型，测试在同一
+事件循环内创建并等待后台任务结束，得到终态 ExportJob 后再断言。
+"""
+
+from __future__ import annotations
+
+import asyncio
+import base64
+import re
+import zlib
+from datetime import datetime, timedelta, timezone
+
+import pytest
+from pydantic import ValidationError
+
+from app.config import get_settings
+from app.contracts import (
+    ExportFormat,
+    ExportJob,
+    ExportOptions,
+    ExportRequest,
+    ExportSource,
+    ExportSourceType,
+    ExportStatus,
+)
+from app.errors import ApiError
+from app.export import service as export_service
+from app.export.exporters.html import HtmlExporter
+from app.export.markdown import parse_document
+
+MD = """# 进程调度
+
+一些 **加粗** 和 *斜体*，[链接](https://a.b) 与 `code`。
+
+- 项目一
+- 项目二
+
+```python
+print(1)
+```
+
+```mermaid
+graph LR
+```
+
+```function_plot
+y = x
+```
+
+| a | b |
+|---|---|
+| 1 | 2 |
+
+行内 $x^2$ 与块级
+$$
+y = mx + b
+$$
+"""
+
+
+@pytest.fixture(autouse=True)
+def _reset_export_state():
+    """清空内存注册表，避免跨用例的任务/取消标志互相污染。
+
+    每个用例经 `asyncio.run()` 使用独立事件循环，模块级 Semaphore 会绑定到首个
+    循环，跨用例复用会触发「bound to a different event loop」；此处每例重建槽位。
+    """
+    export_service._jobs.clear()
+    export_service._tasks.clear()
+    export_service._cancel_flags.clear()
+    export_service._render_slots = asyncio.Semaphore(export_service.MAX_CONCURRENT_RENDERS)
+    yield
+    export_service._jobs.clear()
+    export_service._tasks.clear()
+    export_service._cancel_flags.clear()
+
+
+def _create_and_wait(request: ExportRequest) -> object:
+    """创建导出并在同一事件循环内等待后台任务结束，返回终态 ExportJob。"""
+
+    async def _execute():
+        job = await export_service.create_export(request)
+        return await export_service.wait_for_export(job.job_id)
+
+    return asyncio.run(_execute())
+
+
+# --------------------------------------------------------------------------- #
+# markdown → Document AST
+# --------------------------------------------------------------------------- #
+def _types(nodes) -> list[str]:
+    return [n.type for n in nodes]
+
+
+def test_parse_document_heading_and_inline() -> None:
+    doc = parse_document("# 标题\n\n一段 **加粗** 和 [链接](https://a.b)。")
+
+    assert doc.type == "document"
+    heading = doc.children[0]
+    assert heading.type == "heading"
+    assert heading.attributes["level"] == 1
+
+    para = doc.children[1]
+    assert para.type == "paragraph"
+    kinds = _types(para.children)
+    assert "text" in kinds
+    assert "strong" in kinds
+    assert "link" in kinds
+
+    link = next(c for c in para.children if c.type == "link")
+    assert link.attributes["href"] == "https://a.b"
+
+
+def test_parse_document_list_and_code_fencing() -> None:
+    doc = parse_document("- a\n- b\n\n```mermaid\ngraph LR\n```\n\n```function_plot\ny=x\n```\n\n```python\nx\n```")
+
+    kinds = [c.type for c in doc.children]
+    assert kinds[0] == "list"
+    assert kinds[1] == "mermaid"
+    assert kinds[2] == "function_plot"
+    assert kinds[3] == "code_block"
+
+    code = doc.children[3]
+    assert code.attributes["language"] == "python"
+    assert code.text == "x"
+
+
+def test_parse_document_table_and_math() -> None:
+    doc = parse_document("| a | b |\n|---|---|\n| 1 | 2 |\n\n$x^2$\n\n$$\ny=mx\n$$")
+
+    table = doc.children[0]
+    assert table.type == "table"
+    assert table.children[0].type == "table_row"
+    assert table.children[0].children[0].attributes["head"] is True
+
+    # 表格后是「行内数学所在段落」与「块级数学」
+    kinds = [c.type for c in doc.children[1:]]
+    assert "paragraph" in kinds
+    assert "math_block" in kinds
+
+
+def test_parse_document_image_maps_src_alt_title() -> None:
+    doc = parse_document('![替代文本](https://a.b/img.png "标题")')
+    img = doc.children[0].children[0]
+    assert img.type == "image"
+    assert img.attributes["src"] == "https://a.b/img.png"
+    assert img.attributes["alt"] == "替代文本"
+    assert img.attributes["title"] == "标题"
+
+
+def test_parse_document_function_plot_dash_alias() -> None:
+    doc = parse_document("```function-plot\ny = x^2\n```")
+    assert doc.children[0].type == "function_plot"
+    assert doc.children[0].text == "y = x^2"
+
+
+# --------------------------------------------------------------------------- #
+# HtmlExporter
+# --------------------------------------------------------------------------- #
+async def _render(markdown: str, *, title: str = "") -> str:
+    doc = parse_document(markdown)
+    doc.attributes["title"] = title
+    result = await HtmlExporter().export(doc, ExportOptions())
+    return result.content.decode("utf-8")
+
+
+def test_html_exporter_renders_basic_nodes_and_escapes() -> None:
+    html = asyncio.run(_render("# 标题\n\n**加粗** [链接](https://a.b) 与 <b>原始</b>。"))
+
+    assert "<h1>标题</h1>" in html
+    assert "<strong>加粗</strong>" in html
+    assert '<a href="https://a.b">链接</a>' in html
+    # 原始 HTML 必须被转义，不能注入文档
+    assert "&lt;b&gt;原始&lt;/b&gt;" in html
+    assert "<b>原始</b>" not in html
+
+
+def test_html_exporter_marks_mermaid_and_function_plot() -> None:
+    result = asyncio.run(HtmlExporter().export(parse_document("```mermaid\ngraph LR\n```"), ExportOptions()))
+
+    html = result.content.decode("utf-8")
+    assert '<pre class="mermaid">graph LR</pre>' in html
+    assert any("mermaid" in w for w in result.warnings)
+
+
+def test_html_exporter_rejects_unsafe_link_protocol() -> None:
+    result = asyncio.run(
+        HtmlExporter().export(parse_document("[点我](javascript:alert(1))"), ExportOptions())
+    )
+    html = result.content.decode("utf-8")
+    assert "javascript:" not in html
+    assert "点我" in html
+    assert any("不安全" in w for w in result.warnings)
+
+
+def test_html_exporter_rejects_unsafe_image_protocol() -> None:
+    result = asyncio.run(
+        HtmlExporter().export(parse_document("![alt](data:text/html,<script>)"), ExportOptions())
+    )
+    html = result.content.decode("utf-8")
+    assert "data:" not in html
+    assert "<img" not in html
+    assert "alt" in html
+    assert any("不安全" in w for w in result.warnings)
+
+
+def test_html_exporter_preserves_raw_html_block() -> None:
+    result = asyncio.run(
+        HtmlExporter().export(parse_document("<div>重要正文</div>"), ExportOptions())
+    )
+    html = result.content.decode("utf-8")
+    assert "重要正文" in html
+    assert "<div>" not in html
+    assert "&lt;div&gt;重要正文&lt;/div&gt;" in html
+    assert any("原始 HTML" in w for w in result.warnings)
+
+
+def test_html_exporter_include_title_and_metadata() -> None:
+    doc = parse_document("正文")
+    doc.attributes["title"] = "操作系统复习"
+    doc.attributes["metadata"] = {"tags": ["os", "复习"]}
+
+    opts = ExportOptions(include_title=True, include_metadata=True)
+    result = asyncio.run(HtmlExporter().export(doc, opts))
+    html = result.content.decode("utf-8")
+
+    assert '<h1 class="title">操作系统复习</h1>' in html
+    assert "os, 复习" in html
+
+
+# --------------------------------------------------------------------------- #
+# ExportService
+# --------------------------------------------------------------------------- #
+def _markdown_request(markdown: str, *, format: ExportFormat = ExportFormat.html) -> ExportRequest:
+    return ExportRequest(
+        source=ExportSource(type=ExportSourceType.markdown, markdown=markdown),
+        format=format,
+    )
+
+
+def test_export_markdown_source_completes_and_writes_file() -> None:
+    finished = _create_and_wait(_markdown_request(MD))
+
+    assert finished.status == ExportStatus.completed
+    assert finished.file is not None
+    assert finished.file.mime_type == "text/html"
+    assert finished.file.size > 0
+    assert len(finished.file.sha256) == 64
+
+    path = get_settings().exports_path / f"{finished.job_id}.html"
+    assert path.exists()
+    content = path.read_text(encoding="utf-8")
+    assert "进程调度" in content
+
+
+def test_export_note_source_resolves_title_and_metadata() -> None:
+    from app.services import note_service
+
+    async def _go():
+        note = await note_service.create_note(
+            title="操作系统复习", markdown="# 进程调度\n\n内容。", folder="导出", tags=["os"]
+        )
+        request = ExportRequest(
+            source=ExportSource(type=ExportSourceType.note, note_id=note.note_id),
+            format=ExportFormat.html,
+            options=ExportOptions(include_metadata=True),
+        )
+        job = await export_service.create_export(request)
+        return await export_service.wait_for_export(job.job_id)
+
+    finished = asyncio.run(_go())
+    assert finished.status == ExportStatus.completed
+    assert finished.file is not None
+    assert finished.file.file_name == "操作系统复习.html"
+    content = (get_settings().exports_path / f"{finished.job_id}.html").read_text(encoding="utf-8")
+    assert "操作系统复习" in content
+    assert "进程调度" in content
+
+
+# --------------------------------------------------------------------------- #
+# PDF / DOCX 导出
+# --------------------------------------------------------------------------- #
+def test_export_pdf_completes_with_pdf_magic_bytes() -> None:
+    finished = _create_and_wait(_markdown_request(MD, format=ExportFormat.pdf))
+
+    assert finished.status == ExportStatus.completed
+    assert finished.file is not None
+    assert finished.file.mime_type == "application/pdf"
+    assert finished.file.file_name.endswith(".pdf")
+
+    path = get_settings().exports_path / f"{finished.job_id}.pdf"
+    assert path.exists()
+    assert path.read_bytes()[:4] == b"%PDF"
+
+
+def test_export_docx_completes_with_zip_magic_bytes() -> None:
+    finished = _create_and_wait(_markdown_request(MD, format=ExportFormat.docx))
+
+    assert finished.status == ExportStatus.completed
+    assert finished.file is not None
+    assert finished.file.mime_type == (
+        "application/vnd.openxmlformats-officedocument.wordprocessingml.document"
+    )
+    assert finished.file.file_name.endswith(".docx")
+
+    path = get_settings().exports_path / f"{finished.job_id}.docx"
+    assert path.exists()
+    assert path.read_bytes()[:2] == b"PK"
+
+
+def test_pdf_exporter_marks_plot_and_mermaid_as_placeholders() -> None:
+    from app.export.exporters.pdf import PdfExporter
+
+    md = "```mermaid\ngraph LR\n```\n\n```function_plot\ny = x\n```"
+    result = asyncio.run(PdfExporter().export(parse_document(md), ExportOptions()))
+    assert result.content[:4] == b"%PDF"
+    assert any("mermaid" in w for w in result.warnings)
+    assert any("函数图像" in w for w in result.warnings)
+
+
+def test_docx_exporter_marks_plot_and_mermaid_as_placeholders() -> None:
+    from app.export.exporters.docx import DocxExporter
+
+    md = "```mermaid\ngraph LR\n```\n\n```function_plot\ny = x\n```"
+    result = asyncio.run(DocxExporter().export(parse_document(md), ExportOptions()))
+    assert result.content[:2] == b"PK"
+    assert any("mermaid" in w for w in result.warnings)
+    assert any("函数图像" in w for w in result.warnings)
+
+
+def test_pdf_exporter_embeds_cjk_font() -> None:
+    from app.export.exporters.pdf import PdfExporter
+
+    doc = parse_document("# 进程调度\n\n一些中文正文。")
+    doc.attributes["title"] = "操作系统复习"
+    result = asyncio.run(PdfExporter().export(doc, ExportOptions(include_title=True)))
+    assert result.content[:4] == b"%PDF"
+    # 中文字体通过 STSong-Light CID 字体嵌入，PDF 内应引用该 BaseFont
+    assert b"STSong-Light" in result.content
+
+
+def test_docx_exporter_contains_cjk_text() -> None:
+    import zipfile
+    from io import BytesIO
+
+    from app.export.exporters.docx import DocxExporter
+
+    doc = parse_document("# 进程调度\n\n一些中文正文。")
+    result = asyncio.run(DocxExporter().export(doc, ExportOptions()))
+    with zipfile.ZipFile(BytesIO(result.content)) as zf:
+        xml = zf.read("word/document.xml")
+    assert "进程调度".encode("utf-8") in xml
+
+
+def _pdf_unescape(raw: bytes) -> bytes:
+    """反转义 PDF 字符串字面量（八进制转义与 \n \r \t 等）。"""
+    out = bytearray()
+    i = 0
+    n = len(raw)
+    while i < n:
+        b = raw[i]
+        if b == 0x5C and i + 1 < n:  # 反斜杠转义
+            nxt = raw[i + 1]
+            if 0x30 <= nxt <= 0x37:  # 八进制（如 \000）
+                j = i + 1
+                digits = bytearray()
+                while j < n and j < i + 4 and 0x30 <= raw[j] <= 0x37:
+                    digits.append(raw[j])
+                    j += 1
+                out.append(int(digits.decode(), 8) & 0xFF)
+                i = j
+                continue
+            simple = {0x6E: 0x0A, 0x72: 0x0D, 0x74: 0x09, 0x62: 0x08, 0x66: 0x0C}
+            out.append(simple.get(nxt, nxt))
+            i += 2
+            continue
+        out.append(b)
+        i += 1
+    return bytes(out)
+
+
+def _extract_pdf_text(content: bytes) -> str:
+    """从 PDF 内容流提取文本（仅测试断言用，非完整 PDF 文本提取）。
+
+    reportlab 对 CID 字体按 UTF-16BE（高位 0x00）编码，字符串写为 \000 前缀的八进制
+    转义；这里解码 ASCII85+flate 内容流、反转义字符串并去掉 0x00 还原 ASCII 正文。
+    """
+    chunks: list[str] = []
+    for m in re.finditer(rb"stream\r?\n(.*?)endstream", content, re.DOTALL):
+        raw = m.group(1).strip()
+        if raw.endswith(b"~>"):
+            raw = raw[:-2]
+        try:
+            dec = zlib.decompress(base64.a85decode(raw))
+        except Exception:
+            try:
+                dec = zlib.decompress(raw)
+            except Exception:
+                dec = raw
+        for sm in re.finditer(rb"\(((?:[^()\\]|\\.)*)\)\s*Tj", dec):
+            text = _pdf_unescape(sm.group(1))
+            if text.count(0) > len(text) // 4:
+                text = text.replace(b"\x00", b"")
+            chunks.append(text.decode("latin-1"))
+    return "".join(chunks)
+
+
+# --------------------------------------------------------------------------- #
+# 审阅回归：结构内容验证（不只校验魔法字节，还验证产物正文）
+# --------------------------------------------------------------------------- #
+def test_pdf_blockquote_preserves_content() -> None:
+    from app.export.exporters.pdf import PdfExporter
+
+    # P2：引用块正文不能因「把块级子节点交给行内渲染器」而丢失
+    result = asyncio.run(
+        PdfExporter().export(parse_document("> quoted **content**"), ExportOptions())
+    )
+    text = _extract_pdf_text(result.content)
+    assert "quoted" in text
+    assert "content" in text
+    assert not any("无法表示" in w for w in result.warnings)
+
+
+def test_docx_blockquote_preserves_content() -> None:
+    import zipfile
+    from io import BytesIO
+
+    from app.export.exporters.docx import DocxExporter
+
+    result = asyncio.run(
+        DocxExporter().export(parse_document("> quoted **content**"), ExportOptions())
+    )
+    with zipfile.ZipFile(BytesIO(result.content)) as zf:
+        xml = zf.read("word/document.xml").decode("utf-8")
+    assert "quoted" in xml
+    assert "content" in xml
+    assert not any("无法表示" in w for w in result.warnings)
+
+
+def test_pdf_nested_list_parent_before_child() -> None:
+    from app.export.exporters.pdf import PdfExporter
+
+    # P2：嵌套列表输出顺序颠倒——父级正文应在子列表之前
+    result = asyncio.run(
+        PdfExporter().export(parse_document("- parent\n  - child"), ExportOptions())
+    )
+    text = _extract_pdf_text(result.content)
+    assert text.index("parent") < text.index("child")
+
+
+def test_docx_nested_list_parent_before_child() -> None:
+    import zipfile
+    from io import BytesIO
+
+    from app.export.exporters.docx import DocxExporter
+
+    result = asyncio.run(
+        DocxExporter().export(parse_document("- parent\n  - child"), ExportOptions())
+    )
+    with zipfile.ZipFile(BytesIO(result.content)) as zf:
+        xml = zf.read("word/document.xml").decode("utf-8")
+    assert xml.index("parent") < xml.index("child")
+
+
+def test_export_cancel_queued_job_waiting_for_slot(monkeypatch) -> None:
+    # P2：等待渲染槽位的任务取消后应立即进入 cancelled，不必等前面的渲染完成
+    import threading
+
+    real_render = export_service._render_document
+    release = threading.Event()
+    entered = 0
+    lock = threading.Lock()
+
+    def blocking_render(document, options, format):
+        nonlocal entered
+        with lock:
+            entered += 1
+        release.wait(timeout=5)
+        return real_render(document, options, format)
+
+    monkeypatch.setattr(export_service, "_render_document", blocking_render)
+
+    async def _go():
+        a = await export_service.create_export(_markdown_request("# a"))
+        b = await export_service.create_export(_markdown_request("# b"))
+        # 等 a/b 两个任务都拿到槽位并阻塞在渲染里
+        for _ in range(2000):
+            if entered >= 2:
+                break
+            await asyncio.sleep(0.001)
+        c = await export_service.create_export(_markdown_request("# c"))
+        await asyncio.sleep(0.01)  # 让 c 进入排队等待槽位
+        export_service.cancel_export(c.job_id)
+        finished_c = await export_service.wait_for_export(c.job_id)
+        release.set()  # 放行前面的任务，避免测试挂起
+        await asyncio.gather(
+            export_service.wait_for_export(a.job_id),
+            export_service.wait_for_export(b.job_id),
+        )
+        return finished_c
+
+    finished = asyncio.run(_go())
+    assert finished.status == ExportStatus.cancelled
+    assert finished.file is None
+
+
+def test_export_unknown_note_404() -> None:
+    request = ExportRequest(
+        source=ExportSource(type=ExportSourceType.note, note_id="note_missing"),
+        format=ExportFormat.html,
+    )
+    with pytest.raises(ApiError) as exc:
+        asyncio.run(export_service.create_export(request))
+    assert exc.value.status_code == 404
+    assert exc.value.code == "EXPORT_SOURCE_NOT_FOUND"
+
+
+def test_export_empty_markdown_invalid() -> None:
+    with pytest.raises(ApiError) as exc:
+        asyncio.run(export_service.create_export(_markdown_request("   ")))
+    assert exc.value.status_code == 400
+    assert exc.value.code == "EXPORT_OPTIONS_INVALID"
+
+
+def test_export_cancel_queued_job() -> None:
+    async def _go():
+        job = await export_service.create_export(_markdown_request("# x"))
+        cancelled = export_service.cancel_export(job.job_id)
+        assert cancelled is not None
+        return await export_service.wait_for_export(job.job_id)
+
+    finished = asyncio.run(_go())
+    assert finished.status == ExportStatus.cancelled
+    assert finished.file is None
+
+
+def test_export_file_expired_410() -> None:
+    async def _go():
+        job = await export_service.create_export(_markdown_request("# x"))
+        finished = await export_service.wait_for_export(job.job_id)
+        past = datetime.now(timezone.utc) - timedelta(hours=1)
+        export_service._jobs[job.job_id] = finished.model_copy(
+            update={"file": finished.file.model_copy(update={"expires_at": past})}
+        )
+        return job.job_id
+
+    job_id = asyncio.run(_go())
+    path = get_settings().exports_path / f"{job_id}.html"
+    with pytest.raises(ApiError) as exc:
+        export_service.get_export_file(job_id)
+    assert exc.value.status_code == 410
+    assert exc.value.code == "EXPORT_FILE_EXPIRED"
+    assert not path.exists()  # 过期即清理产物文件
+    assert export_service.get_export(job_id) is None  # 内存记录一并清理
+
+
+def test_export_eviction_deletes_file() -> None:
+    finished = _create_and_wait(_markdown_request("# 淘汰"))
+    victim_path = get_settings().exports_path / f"{finished.job_id}.html"
+    assert victim_path.exists()
+
+    # 塞满 MAX_JOBS 个终态任务，下一次 create 会淘汰最旧的终态（finished 最先插入）
+    for i in range(export_service.MAX_JOBS):
+        export_service._jobs[f"export_fake_{i}"] = ExportJob(
+            job_id=f"export_fake_{i}",
+            status=ExportStatus.completed,
+            format=ExportFormat.html,
+            created_at=datetime.now(timezone.utc),
+        )
+    _create_and_wait(_markdown_request("# 触发淘汰"))
+    assert not victim_path.exists()
+
+
+def test_cleanup_orphan_files() -> None:
+    exports_dir = get_settings().exports_path
+    exports_dir.mkdir(parents=True, exist_ok=True)
+    orphan = exports_dir / "export_orphan.html"
+    orphan.write_text("stale", encoding="utf-8")
+
+    finished = _create_and_wait(_markdown_request("# 保留"))
+    keep_path = exports_dir / f"{finished.job_id}.html"
+    assert keep_path.exists()
+
+    removed = export_service.cleanup_orphan_files()
+    assert removed >= 1
+    assert not orphan.exists()
+    assert keep_path.exists()  # 仍在注册表中的任务文件保留
+
+
+def test_export_cancel_during_running(monkeypatch) -> None:
+    import threading
+    import time
+
+    real_parse = parse_document
+    started = threading.Event()
+
+    def slow_parse(markdown: str):
+        started.set()
+        time.sleep(0.1)
+        return real_parse(markdown)
+
+    monkeypatch.setattr(export_service, "parse_document", slow_parse)
+
+    async def _go():
+        job = await export_service.create_export(_markdown_request("# 运行中取消"))
+        while not started.is_set():
+            await asyncio.sleep(0)
+        export_service.cancel_export(job.job_id)
+        return await export_service.wait_for_export(job.job_id)
+
+    finished = asyncio.run(_go())
+    assert finished.status == ExportStatus.cancelled
+    assert finished.file is None
+    assert not (get_settings().exports_path / f"{finished.job_id}.html").exists()
+
+
+def test_export_list_and_get() -> None:
+    finished = _create_and_wait(_markdown_request("# 列表测试"))
+
+    items, total = export_service.list_exports(limit=50, offset=0)
+    assert total == 1
+    assert items[0].job_id == finished.job_id
+
+    got = export_service.get_export(finished.job_id)
+    assert got is not None and got.status == ExportStatus.completed
+
+    assert export_service.get_export("export_missing") is None
+
+
+# --------------------------------------------------------------------------- #
+# 契约校验
+# --------------------------------------------------------------------------- #
+def test_export_source_requires_matching_field() -> None:
+    with pytest.raises(ValidationError):
+        ExportSource(type=ExportSourceType.note, note_id=None)
+    with pytest.raises(ValidationError):
+        ExportSource(type=ExportSourceType.markdown, markdown=None)
+
+
+# --------------------------------------------------------------------------- #
+# 审阅回归：资源上限
+# --------------------------------------------------------------------------- #
+def test_export_note_source_size_limit(monkeypatch) -> None:
+    # P1：note 源超出 MAX_MARKDOWN_CHARS 应在创建期拒绝，不进入后台渲染
+    from app.services import note_service
+
+    monkeypatch.setattr(export_service, "MAX_MARKDOWN_CHARS", 10)
+
+    async def _go():
+        note = await note_service.create_note(
+            title="超长笔记", markdown="a" * 20, folder="导出", tags=[]
+        )
+        return await export_service.create_export(
+            ExportRequest(
+                source=ExportSource(type=ExportSourceType.note, note_id=note.note_id),
+                format=ExportFormat.html,
+            )
+        )
+
+    with pytest.raises(ApiError) as exc:
+        asyncio.run(_go())
+    assert exc.value.status_code == 400
+    assert exc.value.code == "EXPORT_OPTIONS_INVALID"
+
+
+def test_export_output_too_large(monkeypatch) -> None:
+    # P1：产物超出 MAX_EXPORT_BYTES 应标记 failed 且不落盘
+    monkeypatch.setattr(export_service, "MAX_EXPORT_BYTES", 10)
+
+    finished = _create_and_wait(_markdown_request("# 产物超限"))
+    assert finished.status == ExportStatus.failed
+    assert finished.error_code == "EXPORT_OUTPUT_TOO_LARGE"
+    assert finished.file is None
+    assert not (get_settings().exports_path / f"{finished.job_id}.html").exists()
+
+
+def test_export_limits_concurrent_rendering(monkeypatch) -> None:
+    # P1：并发渲染受 MAX_CONCURRENT_RENDERS 限制，大量任务不会同时占满工作线程
+    import threading
+    import time
+
+    real_render = export_service._render_document
+    active = 0
+    peak = 0
+    lock = threading.Lock()
+
+    def slow_render(document, options, format):
+        nonlocal active, peak
+        with lock:
+            active += 1
+            peak = max(peak, active)
+        time.sleep(0.05)
+        with lock:
+            active -= 1
+        return real_render(document, options, format)
+
+    monkeypatch.setattr(export_service, "_render_document", slow_render)
+
+    async def _go():
+        jobs = [
+            await export_service.create_export(_markdown_request(f"# t{i}"))
+            for i in range(6)
+        ]
+        return [await export_service.wait_for_export(j.job_id) for j in jobs]
+
+    finished = asyncio.run(_go())
+    assert all(j.status == ExportStatus.completed for j in finished)
+    assert peak <= export_service.MAX_CONCURRENT_RENDERS

backend/tests/test_index_activity.py

@@ -0,0 +1,68 @@
+import asyncio
+from types import SimpleNamespace
+
+import pytest
+
+from app.retrieval import activity
+from app.services import index_service
+
+
+@pytest.fixture(autouse=True)
+def reset_activity(monkeypatch):
+    for field in ('active', 'completed', 'failed', 'cancelled'):
+        monkeypatch.setattr(activity, field, 0)
+    monkeypatch.setattr(index_service, '_active_job_id', None)
+    monkeypatch.setattr(index_service, '_active_scope', None)
+    monkeypatch.setattr(index_service, '_last_error', None)
+    monkeypatch.setattr(index_service.repository, 'stats', lambda: {'notes': 16, 'blocks': 3787})
+    monkeypatch.setattr(index_service.repository, 'get_index_meta', lambda: {})
+
+
+def test_pending_rebuild_and_incremental_jobs(monkeypatch):
+    meta = {'workspace_vectors_pending': '1', 'note_vectors_pending:a': '1', 'note_vectors_pending:b': '1'}
+    monkeypatch.setattr(index_service.repository, 'get_index_meta', lambda: meta)
+    status = index_service.get_status()
+    assert status.vector_refresh_required and status.pending_jobs == 1
+    assert status.running_jobs == 0
+    monkeypatch.setattr(index_service, '_active_job_id', 'job_test')
+    monkeypatch.setattr(index_service, '_active_scope', 'all')
+    status = index_service.get_status()
+    assert (status.status, status.pending_jobs, status.running_jobs) == ('running', 1, 1)
+    monkeypatch.setattr(index_service, '_active_scope', 'note')
+    assert index_service.get_status().pending_jobs == 2
+    meta.pop('workspace_vectors_pending')
+    assert index_service.get_status().pending_jobs == 2
+    monkeypatch.setattr(index_service, '_active_job_id', None)
+    monkeypatch.setattr(index_service, '_last_error', 'failed')
+    status = index_service.get_status()
+    assert (status.status, status.pending_jobs, status.running_jobs) == ('failed', 2, 0)
+    meta.clear()
+    assert index_service.get_status().pending_jobs == 0
+
+
+def test_search_activity_covers_completion_failure_and_cancellation():
+    async def scenario():
+        gate = asyncio.Event()
+
+        @activity.track_search
+        async def search(_self, request):
+            await gate.wait()
+            if request.query == 'fail':
+                raise ValueError('failure')
+            return 'ok'
+
+        tasks = [asyncio.create_task(search(None, SimpleNamespace(mode=mode, query=query)))
+                 for mode, query in [('vector', 'ok'), ('hybrid', 'fail'), ('vector', 'cancel'), ('fts', 'ok')]]
+        await asyncio.sleep(0)
+        assert index_service.get_status().active_searches == 3
+        tasks[2].cancel()
+        with pytest.raises(asyncio.CancelledError):
+            await tasks[2]
+        gate.set()
+        results = await asyncio.gather(*tasks, return_exceptions=True)
+        assert results[0] == results[3] == 'ok'
+        status = index_service.get_status()
+        assert (status.active_searches, status.completed_searches, status.failed_searches, status.cancelled_searches) == (0, 1, 1, 1)
+        assert status.pending_jobs == 0
+
+    asyncio.run(scenario())

backend/tests/test_local_models.py

@@ -12,6 +12,42 @@ from app.local_models.runtime import Runtime
 from app.providers.base import ProviderError
 
 
+@pytest.mark.parametrize('threaded', [False, True])
+def test_large_embedding_result_crosses_pipe_limit_without_truncation(monkeypatch, tmp_path, threaded):
+    import app.local_models.runtime as module
+    import app.local_models.process as process_module
+    from app.local_models.protocol import response_lines
+    vector = [0.012345678901234567] * 384
+    result = {'result': [vector] * 2111}
+    assert len(json.dumps(result).encode()) > 16 * 1024 * 1024
+    assert max(map(len, response_lines(result, 'embedding'))) < 16 * 1024 * 1024
+    worker = tmp_path / 'large_worker.py'
+    protocol_dir = Path(module.__file__).parent
+    worker.write_text(
+        'import sys,json\n'
+        f'sys.path.insert(0, {str(protocol_dir)!r})\n'
+        'from protocol import response_lines\n'
+        'request=json.load(sys.stdin)\n'
+        'vector=[0.012345678901234567]*384\n'
+        'for line in response_lines({"result":[vector]*len(request["payload"]["texts"])}, "embedding"):\n'
+        ' sys.stdout.write(line)\n', encoding='utf-8')
+    monkeypatch.setattr(module, 'read_state', lambda key: {'status': 'installed'})
+    monkeypatch.setattr(module, 'interpreter', lambda *_: Path(sys.executable))
+    original_async = asyncio.create_subprocess_exec
+    original_threaded = process_module.ThreadedProcess
+
+    async def spawn(*args, **kwargs):
+        if threaded:
+            raise NotImplementedError
+        return await original_async(sys.executable, str(worker), **kwargs)
+
+    monkeypatch.setattr(module.asyncio, 'create_subprocess_exec', spawn)
+    monkeypatch.setattr(process_module, 'ThreadedProcess',
+                        lambda args, **kwargs: original_threaded((sys.executable, str(worker)), **kwargs))
+    actual = asyncio.run(Runtime().infer('bekko', 'embedding', {'texts': ['test'] * 2111}))
+    assert actual == result['result']
+
+
 def test_download_resumes_partial_and_checks_digest(monkeypatch):
     payload = b'verified-model-weights'
     entry = {'path':'model.safetensors','size':len(payload),'hash':hashlib.sha256(payload).hexdigest(),

backend/tests/test_operation_logs.py

@@ -0,0 +1,151 @@
+import asyncio
+import json
+import logging
+import threading
+from pathlib import Path
+
+from app.operation_logs import LogStore, ApplicationLogHandler, get_store, log_event, shutdown_logging
+
+
+def test_logs_persist_filter_cursor_and_retention(tmp_path):
+    store = LogStore(tmp_path / 'logs.db', retain=3)
+    try:
+        for i in range(6):
+            store.emit('ERROR' if i % 2 else 'INFO', 'vectors', 'embedding.failed', {'run_id': f'run_{i}'})
+        store.queue.join()
+        first = store.query(limit=2)
+        assert len(first['items']) == 2 and first['next_cursor']
+        assert len(store.query(before=first['next_cursor'])['items']) == 1
+        assert len(store.query(level='ERROR')['items']) == 2
+        assert len(store.query(q='run_5')['items']) == 1
+        assert not store.query(source='tasks')['items']
+    finally:
+        store.close()
+    reopened = LogStore(tmp_path / 'logs.db', retain=3)
+    try:
+        assert len(reopened.query()['items']) == 3
+    finally:
+        reopened.close()
+
+
+def test_logs_exclude_content_and_legacy_exception_messages():
+    try:
+        log_event('vectors', 'embedding.failed', level='ERROR',
+                  error=ValueError('private note and secret'), model='embedding-v1',
+                  prompt='private note', arguments={'api_key': 'secret'}, api_key='secret')
+        handler = ApplicationLogHandler()
+        record = logging.LogRecord('app.sample', logging.ERROR, __file__, 1,
+                                   'private note and secret %s', ('credentials',), None)
+        handler.emit(record)
+        handler.emit(record)  # a logger propagated to another installed handler
+        store = get_store()
+        store.queue.join()
+        data = json.dumps(store.query())
+        assert len(store.query()['items']) == 2
+        assert 'private note' not in data and 'credentials' not in data and 'api_key' not in data
+        assert 'ValueError' in data and 'embedding-v1' in data
+    finally:
+        shutdown_logging()
+
+
+def test_http_log_correlates_task_operations_without_body():
+    import httpx
+    from app.main import app
+    async def scenario():
+        async with httpx.AsyncClient(transport=httpx.ASGITransport(app=app), base_url='http://test') as client:
+            response = await client.post('/api/tasks', json={'title': 'private title'})
+            assert response.status_code == 200
+            rid = response.headers['x-request-id']
+            store = get_store()
+            await asyncio.to_thread(store.queue.join)
+            result = (await client.get('/api/logs', params={'q': rid})).json()
+            assert len(result['items']) >= 2
+            assert 'private title' not in json.dumps(result)
+            assert any(item['event'] == 'task.created' for item in result['items'])
+            assert (await client.get('/api/logs', params={'limit': 201})).status_code == 422
+    try:
+        asyncio.run(scenario())
+    finally:
+        shutdown_logging()
+
+
+def test_trace_writer_batches_off_loop_and_survives_cancel():
+    from app.agent.async_trace import AsyncTraceWriter
+    started, release = threading.Event(), threading.Event()
+    class Repository:
+        def write_batch(self, jobs):
+            assert threading.current_thread() is not threading.main_thread()
+            started.set()
+            assert release.wait(2)
+            self.jobs = jobs
+    async def scenario():
+        repo = Repository()
+        writer = AsyncTraceWriter(repo)
+        pending = asyncio.create_task(writer.submit('save', 'snapshot'))
+        while not started.is_set():
+            await asyncio.sleep(.001)
+        pending.cancel()
+        writer.worker.cancel()  # simultaneous application shutdown
+        await asyncio.sleep(.005)
+        assert not pending.done()
+        release.set()
+        assert await asyncio.wait_for(pending, 2) is True
+        assert repo.jobs == [('save', ('snapshot',))]
+        assert writer.queue.empty()
+    asyncio.run(scenario())
+
+
+def test_trace_write_failure_is_reported_and_next_submission_recovers():
+    from app.agent.async_trace import AsyncTraceWriter
+    class Repository:
+        fail = True
+        def write_batch(self, jobs):
+            if self.fail:
+                self.fail = False
+                raise OSError('disk unavailable')
+    async def scenario():
+        import pytest
+        writer = AsyncTraceWriter(Repository())
+        with pytest.raises(OSError):
+            await writer.submit('save', 'first')
+        assert not await writer.submit('save', 'second')
+        await writer.queue.join()
+    asyncio.run(scenario())
+
+
+def test_log_write_failure_does_not_stall_queue(tmp_path, monkeypatch):
+    store = LogStore(tmp_path / 'failed.db')
+    try:
+        def broken():
+            raise OSError('disk unavailable')
+        monkeypatch.setattr(store, '_connect', broken)
+        store.emit('ERROR', 'vectors', 'embedding.failed', {'duration_ms': float('nan')})
+        store.queue.join()
+        assert store.failed == 1
+    finally:
+        store.close()
+
+
+def test_cancelled_task_write_keeps_its_slot_until_commit():
+    from app.services.task_service import write_in_background
+    started, release = threading.Event(), threading.Event()
+    order = []
+    def first():
+        started.set()
+        assert release.wait(2)
+        order.append('first')
+    async def scenario():
+        import pytest
+        pending = asyncio.create_task(write_in_background(first))
+        while not started.is_set():
+            await asyncio.sleep(.001)
+        pending.cancel()
+        second = asyncio.create_task(write_in_background(lambda: order.append('second')))
+        await asyncio.sleep(.01)
+        assert order == []
+        release.set()
+        with pytest.raises(asyncio.CancelledError):
+            await pending
+        await second
+        assert order == ['first', 'second']
+    asyncio.run(scenario())

backend/tests/test_plot.py

@@ -0,0 +1,324 @@
+"""Function Plot 的解析与静态 SVG 渲染测试。
+
+覆盖 parser 的白名单表达式（幂/隐式乘法/函数/常量）、拒绝项（属性访问、任意调用等）、
+parse_source 指令与回退，以及 render 的 SVG 输出与 HTML 导出链路集成。
+"""
+
+from __future__ import annotations
+
+import asyncio
+import math
+
+import pytest
+
+from app.contracts import ExportOptions
+from app.export.exporters.html import HtmlExporter
+from app.export.markdown import parse_document
+from app.plot.parser import PlotParseError, evaluate, parse_expression, parse_source
+from app.plot.render import render_svg
+from app.plot.renderer import (
+    FunctionPlotStaticRenderer,
+    MermaidStaticRenderer,
+    StaticRenderRequest,
+)
+
+
+# --------------------------------------------------------------------------- #
+# 表达式解析
+# --------------------------------------------------------------------------- #
+def test_parse_expression_power_and_implicit_multiplication() -> None:
+    assert evaluate(parse_expression("x^2"), 3) == 9.0
+    assert evaluate(parse_expression("2^3"), 0) == 8.0
+    assert evaluate(parse_expression("2x+1"), 3) == 7.0
+    assert evaluate(parse_expression("2(x+1)"), 3) == 8.0
+    assert evaluate(parse_expression("(x+1)(x-1)"), 3) == 8.0
+
+
+def test_parse_expression_functions_and_constants() -> None:
+    assert evaluate(parse_expression("sin(0)"), 0) == 0.0
+    assert math.isclose(evaluate(parse_expression("sin(pi/2)"), 0), 1.0)
+    assert math.isclose(evaluate(parse_expression("ln(e)"), 0), 1.0)
+    assert evaluate(parse_expression("abs(-3)"), 0) == 3.0
+
+
+def test_parse_expression_rejects_unsafe() -> None:
+    unsafe = [
+        "os.system('x')",
+        "__import__('os')",
+        "foo(x)",
+        "eval('x')",
+        "x[0]",
+        "x.attr",
+        "lambda: 1",
+    ]
+    for expr in unsafe:
+        with pytest.raises(PlotParseError) as exc:
+            parse_expression(expr)
+        assert exc.value.diagnostic.code == "FUNCTION_PLOT_EXPRESSION_UNSAFE", expr
+
+
+def test_parse_expression_syntax_error() -> None:
+    with pytest.raises(PlotParseError) as exc:
+        parse_expression("x +")
+    assert exc.value.diagnostic.code == "FUNCTION_PLOT_PARSE_FAILED"
+
+
+# --------------------------------------------------------------------------- #
+# fenced 源码解析
+# --------------------------------------------------------------------------- #
+def test_parse_source_directives() -> None:
+    result = parse_source("domain: 0, 10\nrange: -1, 1\nxlabel: x\ngrid: false\ny = x^2")
+    assert result.plot is not None
+    assert result.plot.domain == (0.0, 10.0)
+    assert result.plot.range == (-1.0, 1.0)
+    assert result.plot.axes.xlabel == "x"
+    assert result.plot.axes.grid is False
+    assert len(result.plot.expressions) == 1
+    assert result.plot.expressions[0].expression == "x^2"
+
+
+def test_parse_source_bare_and_multi_expression() -> None:
+    result = parse_source("x^2\nsin(x)")
+    assert result.plot is not None
+    assert [e.expression for e in result.plot.expressions] == ["x^2", "sin(x)"]
+
+
+def test_parse_source_unknown_directive_warns() -> None:
+    result = parse_source("foo: bar\ny = x")
+    assert result.plot is not None  # 未知指令仅 warning，不阻断
+    assert any(d.severity == "warning" for d in result.diagnostics)
+
+
+def test_parse_source_error_returns_no_plot() -> None:
+    result = parse_source("y = os.system('x')")
+    assert result.plot is None
+    assert any(d.severity == "error" for d in result.diagnostics)
+
+
+# --------------------------------------------------------------------------- #
+# SVG 渲染
+# --------------------------------------------------------------------------- #
+def test_render_svg_contains_polyline_and_axes() -> None:
+    plot = parse_source("y = x^2").plot
+    rendered = render_svg(plot)
+    svg = rendered.content
+    assert "<svg" in svg
+    assert "<polyline" in svg
+    assert "<line" in svg  # 坐标轴/网格
+    assert "<script" not in svg
+    assert rendered.width == 640
+    assert rendered.height == 480
+
+
+def test_render_svg_multiple_functions() -> None:
+    plot = parse_source("y = x^2\ny = sin(x)").plot
+    rendered = render_svg(plot)
+    assert rendered.content.count("<polyline") >= 2
+
+
+def test_render_svg_labels() -> None:
+    plot = parse_source("xlabel: 时间\nylabel: 数值\ny = x").plot
+    rendered = render_svg(plot)
+    assert "时间" in rendered.content
+    assert "数值" in rendered.content
+
+
+# --------------------------------------------------------------------------- #
+# HTML 导出链路集成
+# --------------------------------------------------------------------------- #
+def test_html_exporter_embeds_function_plot_svg() -> None:
+    md = "```function-plot\ny = x^2\n```"
+    result = asyncio.run(HtmlExporter().export(parse_document(md), ExportOptions()))
+    html = result.content.decode("utf-8")
+    assert '<figure class="function-plot">' in html
+    assert "<svg" in html
+    assert "<polyline" in html
+
+
+def test_html_exporter_function_plot_fallback_on_error() -> None:
+    md = "```function-plot\ny = os.system('x')\n```"
+    result = asyncio.run(HtmlExporter().export(parse_document(md), ExportOptions()))
+    html = result.content.decode("utf-8")
+    assert '<pre class="function-plot">' in html
+    assert "<svg" not in html
+    assert any("函数图像" in w for w in result.warnings)
+
+
+# --------------------------------------------------------------------------- #
+# 审阅回归：浮点刻度 / 求值异常 / 无效范围
+# --------------------------------------------------------------------------- #
+def test_render_svg_huge_domain_ticks_bounded() -> None:
+    # P1：巨大 domain 下步长受浮点精度限制无法推进，刻度应有限而非死循环
+    plot = parse_source("domain: 10000000000000000, 10000000000000002\nrange: -1, 1\ny = 0").plot
+    rendered = render_svg(plot)
+    assert "<svg" in rendered.content
+
+
+def test_parse_expression_rejects_wrong_arg_count() -> None:
+    # P2：sin() / sin(1, 2) 应在解析期拒绝，而非求值期 TypeError
+    with pytest.raises(PlotParseError):
+        parse_expression("sin()")
+    with pytest.raises(PlotParseError):
+        parse_expression("sin(1, 2)")
+
+
+def test_render_svg_nonreal_samples_are_break_points() -> None:
+    # P2：x^0.5 在负数域产生复数，应作为断点处理，正半轴仍可绘制
+    plot = parse_source("domain: -4, 4\ny = x^0.5").plot
+    rendered = render_svg(plot)
+    assert "<polyline" in rendered.content
+
+
+def test_render_svg_invalid_range_falls_back() -> None:
+    # P2：退化 range（1, 1）应丢弃并自动采样，而非 ZeroDivisionError
+    plot = parse_source("range: 1, 1\ny = x").plot
+    rendered = render_svg(plot)
+    assert "<polyline" in rendered.content
+    assert any("range" in w for w in rendered.warnings)
+
+
+def test_render_svg_nonfinite_range_falls_back() -> None:
+    # P2：非有限 range 端点应丢弃并自动采样
+    plot = parse_source("range: nan, 1\ny = x").plot
+    rendered = render_svg(plot)
+    assert "<polyline" in rendered.content
+
+
+def test_html_exporter_function_plot_render_error_falls_back(monkeypatch) -> None:
+    # P2：渲染异常不阻断整篇导出，回退占位并记 warning
+    import app.plot.renderer as renderer_mod
+
+    def boom(plot):
+        raise RuntimeError("boom")
+
+    monkeypatch.setattr(renderer_mod, "render_svg", boom)
+    md = "```function-plot\ny = x\n```"
+    result = asyncio.run(HtmlExporter().export(parse_document(md), ExportOptions()))
+    html = result.content.decode("utf-8")
+    assert '<pre class="function-plot">' in html
+    assert any("渲染失败" in w for w in result.warnings)
+
+
+# --------------------------------------------------------------------------- #
+# 审阅回归：复杂表达式 / 极端数值范围
+# --------------------------------------------------------------------------- #
+def test_parse_expression_rejects_excessive_depth() -> None:
+    # P2：超长加法链的 AST 深度超限，应拒绝为 PlotParseError 而非触发 RecursionError
+    expr = "+".join(["1"] * 300)
+    with pytest.raises(PlotParseError) as exc:
+        parse_expression(expr)
+    assert exc.value.diagnostic.code == "FUNCTION_PLOT_EXPRESSION_UNSAFE"
+
+
+def test_parse_expression_rejects_excessive_nodes() -> None:
+    # P2：浅层但节点超限的表达式（满二叉树）应被节点数上限拦截
+    def balanced(depth: int) -> str:
+        if depth == 0:
+            return "x"
+        return f"({balanced(depth - 1)}+{balanced(depth - 1)})"
+
+    expr = balanced(10)  # ~2047 个节点，深度仅 ~10
+    with pytest.raises(PlotParseError) as exc:
+        parse_expression(expr)
+    assert exc.value.diagnostic.code == "FUNCTION_PLOT_EXPRESSION_UNSAFE"
+
+
+def test_html_exporter_function_plot_deep_expression_falls_back() -> None:
+    # P2：复杂表达式解析失败应回退占位，不阻断整篇导出
+    expr = "+".join(["1"] * 300)
+    md = f"```function-plot\ny = {expr}\n```"
+    result = asyncio.run(HtmlExporter().export(parse_document(md), ExportOptions()))
+    html = result.content.decode("utf-8")
+    assert '<pre class="function-plot">' in html
+    assert "<svg" not in html
+    assert any("函数图像" in w for w in result.warnings)
+
+
+def test_render_svg_extreme_domain_no_nan() -> None:
+    # P2：有限但跨度溢出的 domain 应回退安全范围，SVG 不得含 nan/inf
+    plot = parse_source("domain: -1e308, 1e308\nrange: -1, 1\ny = 0").plot
+    rendered = render_svg(plot)
+    assert "<svg" in rendered.content
+    assert "nan" not in rendered.content
+    assert "inf" not in rendered.content
+    assert any("domain" in w for w in rendered.warnings)
+
+
+def test_render_svg_extreme_range_no_nan() -> None:
+    # P2：有限但跨度溢出的 range 应回退自动范围，SVG 不得含 nan/inf
+    plot = parse_source("domain: -1, 1\nrange: -1e308, 1e308\ny = x").plot
+    rendered = render_svg(plot)
+    assert "<svg" in rendered.content
+    assert "nan" not in rendered.content
+    assert "inf" not in rendered.content
+    assert any("range" in w for w in rendered.warnings)
+
+
+# --------------------------------------------------------------------------- #
+# 审阅回归：函数/图像数量上限
+# --------------------------------------------------------------------------- #
+def test_parse_source_rejects_too_many_expressions() -> None:
+    # P1：单块表达式数量超限应整块回退，避免海量采样求值
+    source = "\n".join(f"y = x + {i}" for i in range(50))
+    result = parse_source(source)
+    assert result.plot is None
+    assert any(d.code == "FUNCTION_PLOT_TOO_MANY_EXPRESSIONS" for d in result.diagnostics)
+
+
+def test_html_exporter_limits_function_plot_count() -> None:
+    # P1：文档内函数图像数量超限，超出部分回退占位，不耗尽资源
+    blocks = "\n\n".join("```function-plot\ny = x\n```" for _ in range(20))
+    result = asyncio.run(HtmlExporter().export(parse_document(blocks), ExportOptions()))
+    html = result.content.decode("utf-8")
+    # 上限 16：前 16 个渲染为 SVG，其余 4 个回退占位
+    assert html.count('<figure class="function-plot">') == 16
+    assert html.count('<pre class="function-plot">') == 4
+    assert any("函数图像数量超过上限" in w for w in result.warnings)
+
+
+def test_html_exporter_limits_total_plot_nodes(monkeypatch) -> None:
+    # P1：文档级累计 AST 节点预算超限后，后续图像回退占位，防止组合复杂度耗尽 CPU
+    import app.export.exporters.html as html_mod
+
+    monkeypatch.setattr(html_mod, "_MAX_TOTAL_PLOT_NODES", 5)
+    # 第一个图块 y=x（1 节点）在预算内；第二个图块 y=x+x+x+x（7 节点）累计超限
+    md = "```function-plot\ny = x\n```\n\n```function-plot\ny = x + x + x + x\n```"
+    result = asyncio.run(HtmlExporter().export(parse_document(md), ExportOptions()))
+    html = result.content.decode("utf-8")
+    assert html.count('<figure class="function-plot">') == 1
+    assert html.count('<pre class="function-plot">') == 1
+    assert any("累计复杂度" in w for w in result.warnings)
+
+
+# --------------------------------------------------------------------------- #
+# StaticRenderer 内部契约（§10.4）
+# --------------------------------------------------------------------------- #
+def test_function_plot_static_renderer_renders_svg() -> None:
+    renderer = FunctionPlotStaticRenderer()
+    result = renderer.render(StaticRenderRequest(kind="function_plot", source="y = x^2"))
+    assert "<svg" in result.content
+    assert "<polyline" in result.content
+    assert result.mime_type == "image/svg+xml"
+    assert result.width == 640
+    assert result.height == 480
+
+
+def test_function_plot_static_renderer_parse_exposes_node_count() -> None:
+    renderer = FunctionPlotStaticRenderer()
+    parsed = renderer.parse(StaticRenderRequest(kind="function_plot", source="y = x + x"))
+    assert parsed.plot is not None
+    assert parsed.plot.node_count > 0
+
+
+def test_function_plot_static_renderer_raises_on_no_plot() -> None:
+    renderer = FunctionPlotStaticRenderer()
+    request = StaticRenderRequest(kind="function_plot", source="y = os.system('x')")
+    with pytest.raises(ValueError):
+        renderer.render(request)
+
+
+def test_mermaid_static_renderer_returns_placeholder() -> None:
+    renderer = MermaidStaticRenderer()
+    result = renderer.render(StaticRenderRequest(kind="mermaid", source="graph LR"))
+    assert result.content == ""
+    assert any("mermaid" in w for w in result.warnings)

backend/tests/test_routed_retrieval.py

@@ -66,6 +66,161 @@ async def seed():
     return apple, banana
 
 
+def test_native_spaces_isolate_dimensions_and_reuse_without_json_scan(runtime, monkeypatch):
+    from app.retrieval import space_index
+    async def scenario():
+        apple, banana = await seed()
+        ids = [b.block_id for note in (apple, banana) for b in note.blocks]
+        conn = connect()
+        try:
+            with transaction(conn):
+                routed_vectors.store_remote(conn, ids, routed_vectors.RemoteEmbeddings('space-a', 4, [[1., 0., 0., 0.]] * len(ids)))
+            assert conn.execute('SELECT COUNT(DISTINCT dimensions) FROM routed_block_vectors').fetchone()[0] == 2
+        finally:
+            conn.close()
+        # A new connection uses the persistent native index, without reading vector JSON.
+        def forbidden(*args, **kwargs):
+            raise AssertionError('query decoded stored JSON')
+        monkeypatch.setattr(space_index.json, 'loads', forbidden)
+        hits = await routed_vectors.search_remote('apple orchard', top_k=2, strict=True)
+        assert len(hits) == 2
+        assert hits[0].id == apple.blocks[0].block_id
+    asyncio.run(scenario())
+
+
+def test_legacy_vectors_migrate_without_document_embedding(runtime):
+    from app.retrieval import space_index
+    async def scenario():
+        apple, banana = await seed()
+        conn = connect()
+        table = space_index.table_name('space-a', 3)
+        try:
+            with transaction(conn):
+                conn.execute(f'DROP TRIGGER {table}_delete')
+                conn.execute(f'DROP TRIGGER {table}_update')
+                conn.execute(f'DROP TABLE {table}')
+                conn.execute('ALTER TABLE routed_block_vectors RENAME TO saved_vectors')
+                conn.execute('CREATE TABLE routed_block_vectors(space_id TEXT,block_id TEXT REFERENCES blocks(block_id) ON DELETE CASCADE,dimensions INTEGER,vector TEXT,PRIMARY KEY(space_id,block_id))')
+                conn.execute('INSERT INTO routed_block_vectors SELECT * FROM saved_vectors')
+                conn.execute('DROP TABLE saved_vectors')
+        finally:
+            conn.close()
+        runtime.calls.clear()
+        hits = await routed_vectors.search_remote('apple orchard', top_k=2, strict=True)
+        assert len(hits) == 2
+        assert runtime.calls == [['apple orchard']]
+    asyncio.run(scenario())
+
+
+@pytest.mark.parametrize('partitioned', [False, True])
+def test_concurrent_first_search_serializes_migration_and_warm_search_is_read_only(runtime, monkeypatch, partitioned):
+    import threading
+    from app.retrieval import space_index
+    async def scenario():
+        await seed()
+        table = space_index.table_name('space-a', 3)
+        conn = connect()
+        try:
+            with transaction(conn):
+                conn.execute(f'DROP TRIGGER {table}_delete')
+                conn.execute(f'DROP TRIGGER {table}_update')
+                conn.execute(f'DROP TABLE {table}')
+        finally:
+            conn.close()
+        entered, release, second = threading.Event(), threading.Event(), threading.Event()
+        original_ensure, original_prepare = space_index.ensure, space_index.prepare
+        calls = []
+        def ensure(*args):
+            calls.append(1)
+            entered.set()
+            assert release.wait(5)
+            return original_ensure(*args)
+        def prepare(*args):
+            if entered.is_set():
+                second.set()
+            return original_prepare(*args)
+        monkeypatch.setattr(space_index, 'ensure', ensure)
+        monkeypatch.setattr(space_index, 'prepare', prepare)
+        batch = routed_vectors.RemoteEmbeddings('space-a', 3, [[1., 0., 0.]])
+        async def search():
+            if entered.is_set():
+                second.set()
+            await routed_vectors._prepare_indexes([batch])
+            if partitioned:
+                return await asyncio.to_thread(routed_vectors._search_partitions, {False: batch}, {False}, 2, True)
+            return await asyncio.to_thread(routed_vectors._search_space, batch, 2, True)
+        tasks = []
+        try:
+            tasks.append(asyncio.create_task(search()))
+            assert await asyncio.to_thread(entered.wait, 5)
+            tasks.append(asyncio.create_task(search()))
+            assert await asyncio.to_thread(second.wait, 5)
+            release.set()
+            first, other = await asyncio.gather(*tasks)
+            assert first == other and len(first) == 2
+            assert len(calls) == 1
+            # Prepared indexes are reusable even with SQLite query_only enforced.
+            original_connect = routed_vectors.connect
+            def read_only():
+                connection = original_connect()
+                connection.execute('PRAGMA query_only=ON')
+                return connection
+            monkeypatch.setattr(routed_vectors, 'connect', read_only)
+            assert await search() == first
+        finally:
+            release.set()
+            await asyncio.gather(*tasks, return_exceptions=True)
+    asyncio.run(scenario())
+
+
+@pytest.mark.parametrize('cancel_search', [False, True])
+def test_save_waits_for_migration_even_when_search_is_cancelled(runtime, monkeypatch, cancel_search):
+    import threading
+    from app.retrieval import space_index
+    async def scenario():
+        apple, _ = await seed()
+        table = space_index.table_name('space-a', 3)
+        conn = connect()
+        try:
+            with transaction(conn):
+                conn.execute(f'DROP TRIGGER {table}_delete')
+                conn.execute(f'DROP TRIGGER {table}_update')
+                conn.execute(f'DROP TABLE {table}')
+        finally:
+            conn.close()
+        entered, release = threading.Event(), threading.Event()
+        original = space_index.ensure
+        def slow(*args):
+            entered.set()
+            assert release.wait(5)
+            return original(*args)
+        monkeypatch.setattr(space_index, 'ensure', slow)
+        # Keep the subsequent vector job queued; test saving and its durable marker.
+        monkeypatch.setattr(index_service, 'schedule_workspace_rebuild', lambda: None)
+        query = asyncio.create_task(routed_vectors.search_remote('apple orchard', top_k=2, strict=True))
+        save = None
+        try:
+            assert await asyncio.to_thread(entered.wait, 5)
+            if cancel_search:
+                query.cancel()
+            save = asyncio.create_task(note_service.update_note(apple.note_id, markdown='Saved during migration', defer_vectors=True))
+            await asyncio.sleep(0.02)
+            assert not save.done()
+            release.set()
+            saved = await asyncio.wait_for(save, 5)
+            assert saved.markdown == 'Saved during migration'
+            assert (await note_service.get_note(apple.note_id)).markdown == saved.markdown
+            assert repository.get_index_meta()[f'note_vectors_pending:{apple.note_id}'] == '1'
+            # Query may observe the saved revision's pending index, but saving must succeed.
+            result = (await asyncio.gather(query, return_exceptions=True))[0]
+            if cancel_search:
+                assert isinstance(result, asyncio.CancelledError)
+        finally:
+            release.set()
+            await asyncio.gather(*([query, save] if save else [query]), return_exceptions=True)
+    asyncio.run(scenario())
+
+
 @pytest.mark.parametrize("outcome", ["api", "api_failure", "missing_space"])
 def test_benchmark_reports_actual_embedding_and_fallback(runtime, outcome):
     from app.benchmarks import service

backend/tests/test_workspace.py

@@ -114,3 +114,34 @@ def test_workspace_openapi_paths_are_published() -> None:
         "/api/workspace/folders/delete",
         "/api/notes/{note_id}/rename",
     } <= paths.keys()
+
+def test_external_files_are_registered_and_removed_without_vector_wait(monkeypatch) -> None:
+    from app.services import index_service
+    scheduled = []
+    monkeypatch.setattr(index_service, 'schedule_workspace_rebuild', lambda: scheduled.append(True))
+    vault = get_settings().vault_path
+    vault.mkdir(parents=True, exist_ok=True)
+    external = vault / 'external.md'
+    external.write_text('# External\n', encoding='utf-8')
+    tree = asyncio.run(get_workspace_tree())
+    assert tree[0].note_id is not None
+    external.rename(vault / 'renamed.md')
+    tree = asyncio.run(get_workspace_tree())
+    assert [item.name for item in tree] == ['renamed.md']
+    (vault / 'renamed.md').unlink()
+    assert asyncio.run(get_workspace_tree()) == []
+    assert len(scheduled) == 3
+
+
+def test_save_rejects_external_content_change() -> None:
+    import hashlib
+    from app.contracts import NoteUpdateRequest
+    from app.routes import update_note
+    original = '# Original\n'
+    note = asyncio.run(create_note(NoteCreateRequest(title='Conflict', markdown=original)))
+    disk = get_settings().vault_path / note.file_path
+    disk.write_text('# External\n', encoding='utf-8')
+    with pytest.raises(ApiError) as error:
+        asyncio.run(update_note(note.note_id, NoteUpdateRequest(markdown='# Editor\n', expected_content_hash=hashlib.sha256(original.encode()).hexdigest())))
+    assert error.value.code == 'NOTE_CONTENT_CONFLICT'
+    assert disk.read_text(encoding='utf-8') == '# External\n'

backend/tests/test_workspace_background.py

@@ -5,6 +5,33 @@ from app.config import get_settings
 from app.services import index_service, workspace_service
 
 
+def test_external_new_note_does_not_rebuild_existing_notes(monkeypatch):
+    from app.services import note_service
+    async def scenario():
+        await note_service.create_note(title='Existing', markdown='Keep existing vectors', folder=None, tags=[])
+        calls = []
+        original = index_service.prepare_note_index
+        async def record(parsed, **kwargs):
+            calls.append(parsed.file_path)
+            return await original(parsed, **kwargs)
+        async def forbidden(*args, **kwargs):
+            raise AssertionError('full rebuild should not run')
+        monkeypatch.setattr(index_service, 'prepare_note_index', record)
+        monkeypatch.setattr(index_service, 'rebuild', forbidden)
+        path = get_settings().vault_path / 'external.md'
+        path.write_text('# External\n\nNew content', encoding='utf-8')
+        try:
+            await workspace_service.refresh_workspace_tree()
+            await index_service._background_task
+            assert calls == ['external.md']
+            assert not index_service.get_status().vector_refresh_required
+            await workspace_service.open_workspace(None)
+            assert calls == ['external.md']
+        finally:
+            await index_service.shutdown()
+    asyncio.run(scenario())
+
+
 def test_open_returns_before_vectors_and_deduplicates_background(monkeypatch):
     async def scenario():
         started, release = asyncio.Event(), asyncio.Event()

backend/uv.lock

@@ -149,6 +149,153 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/aa/29/35e016098c814cd93de9cd320c66b5bfba14dc6ecedd3cb518fa7c408c69/cffi-2.1.1-cp315-cp315t-win_arm64.whl", hash = "sha256:d18e5ac0f2f03f4f518d3e23db0f0cad7faa1da8620e9c09461d443bbf6e6692", size = 186360, upload-time = "2026-08-03T21:21:13.636Z" },
 ]
 
+[[package]]
+name = "charset-normalizer"
+version = "3.5.1"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/e5/3f/143b048436775b0f76ac3eec145c019e8173ccc2885c8f20319b996d5e83/charset_normalizer-3.5.1.tar.gz", hash = "sha256:6117b84ea48435e5356dc737f5121485c30920ba43375fa7b434fd753df0eac3", size = 171764, upload-time = "2026-08-15T08:20:44.807Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/6a/b6/034f6802e9c3f6418966cfabb7db8c9252cc2429c5098f41cc43af804149/charset_normalizer-3.5.1-cp311-cp311-macosx_10_9_universal2.whl", hash = "sha256:eda059b6bc8bc0812d626fd91a7ce01bf583df0a61296eff390fd94141a34e30", size = 363585, upload-time = "2026-08-15T08:16:46.646Z" },
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+[[package]]
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+version = "1.2.0"
+source = { registry = "https://pypi.org/simple" }
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docs/README.md

@@ -2,7 +2,7 @@
 
 本目录集中保存团队开发期间需要长期维护的架构、接口、实现、协作和问题复盘文档。文档按用途分类，避免设计约束、开发记录与故障复盘混放。
 
-当前文档基线为 2026-09-05：第一阶段和第二阶段 A～F 工程范围已经合并到 `main`，当前可运行形态仍为 Vue/Vite Web 前端与 FastAPI AI Core。Tauri/Rust Host、Stronghold、原生多 Vault 文件系统、生产级 MCP 沙箱和 Sync Server 尚未接入。
+当前文档基线为 2026-09-06：第一阶段和第二阶段 A～F 工程范围已经合并到 `main`，当前可运行形态仍为 Vue/Vite Web 前端与 FastAPI AI Core。Tauri/Rust Host、Stronghold、原生多 Vault 文件系统、生产级 MCP 沙箱和 Sync Server 尚未接入。
 
 仓库入口文档：[项目 README](../README.md)、[前端 README](../frontend/README.md)、[后端 README](../backend/README.md)。
 
@@ -34,11 +34,25 @@
 
 ## development：开发说明
 
+- [前端构建分块优化开发说明](development/前端构建分块优化开发说明.md)
+
+- [工作区后台索引与保存开发说明](development/工作区后台索引与保存开发说明.md)
+- [模型隔离向量索引与增量登记](development/模型隔离向量索引与增量登记.md)
+- [Mermaid 预览与缩放开发说明](development/Mermaid预览与缩放开发说明.md)
+- [扩展安装持久化与社区包开发说明](development/扩展安装持久化与社区包开发说明.md)
+- [模型上下文管理](development/模型上下文管理.md)
+- [Markdown 渲染检查](development/Markdown渲染检查.md)
+- [警告框与桌面编辑命令开发说明](development/警告框与桌面编辑命令开发说明.md)
+- [标题折叠与样式开发说明](development/标题折叠与样式开发说明.md)
+- [主题组件覆盖检查](development/主题组件覆盖检查.md)
+- [第二阶段补充验收工具](development/第二阶段补充验收工具.md)
+
 - [多模态管线与模型运行开发说明](development/多模态管线与模型运行开发说明.md)
 - [阶段 F 收尾验收记录](development/阶段F收尾验收记录.md)
 - [AI Core 与 Agent Core 开发说明](development/AI-Core与Agent-Core开发说明.md)
 - [Knowledge 与 Retrieval Core 开发说明](development/Knowledge与Retrieval-Core开发说明.md)
 - [Benchmark 开发说明](development/Benchmark开发说明.md)
+- [Export 开发说明](development/Export开发说明.md)
 - [模型提供商与模型发现开发说明](development/模型提供商与模型发现开发说明.md)
 - [MCP Bridge 与 Plugin Host 开发说明](development/MCP-Bridge与Plugin-Host开发说明.md)
 - [独立 MCP Server 配置中心开发说明](development/独立MCP-Server配置中心开发说明.md)
@@ -81,3 +95,9 @@
 - 问题复盘至少写清原因、后果、解决思路、实际方案和验证结果。
 - `.local-plans/` 只保存个人或阶段性的本地计划，不属于正式团队文档，不应提交到远程仓库。
 - 文档中的“计划实现”和“已经实现”必须明确区分；实现状态以代码、测试和运行时契约为准。
+
+- [Markdown 语法预设与外部文件刷新](development/Markdown语法预设与外部文件刷新.md)
+
+- [长文渲染优化与压测报告](development/长文渲染优化与压测报告.md)
+- [Agent 与任务压测报告](development/Agent与任务压测报告.md)
+- [后台运行日志与压力问题修复](development/后台运行日志与压力问题修复.md)

docs/architecture/AI笔记软件技术栈说明-团队版-v2.3.md

@@ -2365,7 +2365,7 @@ Quality
 └── Retrieval 参数调优
 
 Content Output
-├── Markdown → HTML / PDF / DOCX
+├── Markdown → HTML（已实现）/ PDF / DOCX（暂缓）
 ├── Mermaid 编辑、预览与静态导出
 └── Function Plot 解析、预览与静态导出
 
@@ -2376,7 +2376,7 @@ Frontend Extension
 └── Plugin Settings UI
 ```
 
-上述列表描述第二阶段技术范围。多模态、MCP Bridge、Plugin Command/Settings、RAG Benchmark 和 Provider 增强已经实现；Agent Benchmark、内容导出、Mermaid/函数图像完整编辑导出及社区主题包仍以各自开发说明的状态为准。每项功能必须继续经过现有 Service、Contract、Permission 和 Adapter 边界，不因 Demo 需要在 Vue 组件、Router 或 Agent Runtime 中直接绑定第三方协议。
+上述列表描述第二阶段技术范围。多模态、MCP Bridge、Plugin Command/Settings、RAG Benchmark、Provider 增强与 Markdown → HTML 导出已经实现；Agent Benchmark、PDF/DOCX 导出、Mermaid/函数图像完整编辑导出及社区主题包仍以各自开发说明的状态为准。每项功能必须继续经过现有 Service、Contract、Permission 和 Adapter 边界，不因 Demo 需要在 Vue 组件、Router 或 Agent Runtime 中直接绑定第三方协议。
 
 第三阶段处理：
 

docs/contracts/Tauri-Rust桌面客户端需求说明-第三阶段.md

@@ -21,7 +21,9 @@
 
 桌面客户端顶部菜单栏的 **段落 → 导入为笔记属性…** 预留元数据格式导入功能，与标题、正文、列表等段落操作归组。它处理笔记内容中的元数据，不是主题包安装入口。
 
-建议稳定的前端命令标识为 `editor.import-note-properties`，仅为设计标识，尚未注册为 Tauri IPC。原生菜单和编辑器命令面板应分发同一命令，避免两套转换逻辑。快捷键待第三阶段统一分配，不抢占现有编辑快捷键。
+稳定的前端命令标识为 `editor.import-note-properties`，已进入前端 v1 命令目录，但属性转换处理器与 Tauri IPC 尚未实现。原生菜单和编辑器命令面板应分发同一命令，避免两套转换逻辑。快捷键待第三阶段统一分配，不抢占现有编辑快捷键。
+
+Markdown 格式（含警告框）与元数据共用 `editorCommandService` 的能力查询和命令分发接口，详见 [警告框与桌面编辑命令开发说明](../development/警告框与桌面编辑命令开发说明.md)。Host 根据 supported / enabled 显隐或禁用菜单，不能把已预留的命令 ID 当作已可执行能力；原生快捷键不绕过活动文档、只读和冲突检查。
 
 ### 2.2 输入与转换规则
 

docs/contracts/后端接口契约-开发版.md

@@ -42,7 +42,7 @@ Web 联调阶段只暴露后端通过 `APP_VAULT_PATH` 配置的单一 Vault，
 | 方法 | 路径 | 用途 |
 | --- | --- | --- |
 | GET | `/api/workspace` | 获取当前 Vault、文件数和索引同步状态 |
-| POST | `/api/workspace/open` | 打开配置的 Vault；磁盘路径集变化时重建索引 |
+| POST | `/api/workspace/open` | 打开配置的 Vault；路径集变化时先登记文件与 FTS，再调度后台向量更新 |
 | GET | `/api/workspace/tree` | 获取真实 Markdown 文件和目录树 |
 | POST | `/api/workspace/folders` | 新建目录 |
 | POST | `/api/workspace/folders/rename` | 重命名目录并同步 Note 路径 |
@@ -198,3 +198,24 @@ RunCancelled
 
 - `GET /api/index/status` 额外返回 `total_notes: int` 和 `total_blocks: int`，来自当前 SQLite 索引；未建立内容索引时为 0。
 - `GET /api/permissions/policy` 返回 `Record<string, "allow" | "confirm" | "deny">`，值取自后端当前生效的 PermissionPolicy。此接口只读，不提供全局修改能力，运行时权限确认仍使用既有 Agent permission endpoint。
+
+## 2026-09-06：后台索引补充
+
+- `POST /api/workspace/open` 返回可使用的 WorkspaceSnapshot，不等待向量推理。
+- 外部新增文件登记后按笔记持久化后台向量任务，不再因此设置全库重建标记；已存在的全库待处理标记仍继续执行。模型空间与维度的持久化 sqlite-vec 索引从已有向量转换，接口响应结构不变。实现与性能验证见 [模型隔离向量索引与增量登记](../development/模型隔离向量索引与增量登记.md)。
+- `PATCH /api/notes/{note_id}` 成功代表正文、元数据和 FTS 已保存；后台向量失败不撤销这次保存。
+- `GET /api/index/status` 新增 `vector_refresh_required: boolean`，表示工作区或笔记存在向量待处理标记。该字段不是进度百分比；任务失败时也可为 true。
+- `pending_jobs` 返回真实未完成索引任务数（包含运行中），不再固定为 0。全库待重建或运行中的全量重建计一个任务；逐笔记刷新按待处理标记计数。`running_jobs` 返回当前运行数。失败后保留的待重建标记仍计入未完成数。
+- `active_searches`、`completed_searches`、`failed_searches`、`cancelled_searches` 分别表示向量/混合检索的进行中、完成、失败、取消次数，覆盖搜索、对话和 Agent 经统一检索引擎发起的调用，排除纯 FTS；混合检索回退 FTS 后成功仍计完成。计数仅保存在当前服务进程内，重启归零，与索引队列互相独立。
+- 设置与搜索页每秒轮询状态，其他页面空闲时每 5 秒轮询；不是事件推送。短检索可能无法观察到进行中状态，但完成/失败计数会保留。设置页与底部状态栏复用状态标签，未知字段显示“未获取”。
+- `POST /api/index/rebuild` 仍仅支持全量重建，并等待结果；不要将上述异步语义推广到所有索引 API。
+
+状态、恢复限制与验证见 [工作区后台索引与保存开发说明](../development/工作区后台索引与保存开发说明.md)。
+
+## 2026-09-06：统一运行日志
+
+`GET /api/logs` 返回独立持久化的后台操作日志，无需打开 Vault。参数：`limit` 默认 50、最大 200；`before` 为上一页 next_cursor；`level` 为 INFO/WARNING/ERROR/CRITICAL 或空；`source` 按模块精确匹配；`q` 在事件名和脱敏元数据中做字面搜索。
+
+返回 `items: [{id,timestamp,level,source,event,details}]`、`next_cursor`（无后续页时 null）、`sources`、`pending`、`dropped`、`write_failures`、`retention`。日志按 ID 倒序，保留最近 20,000 条。响应头 `X-Request-ID` 与后台日志关联。不得依赖日志记录笔记正文、工具参数、凭据或原始异常消息。
+
+队列、错误处理、字段白名单和验证方法见 [后台运行日志与压力问题修复](../development/后台运行日志与压力问题修复.md)。

docs/contracts/第二阶段接口契约-开发版.md

@@ -68,11 +68,11 @@
 | Benchmark | POST | `/api/benchmarks/agent/runs` | 暂缓 | 创建 Agent Benchmark（依赖 Agent Runtime 完成后交付） |
 | Benchmark | GET | `/api/benchmarks/runs` | 已实现 | 分页获取 Benchmark Run |
 | Benchmark | GET/POST | `/api/benchmarks/runs/{run_id}/*` | 计划新增 | 查询、订阅、取消和读取报告 |
-| Export | POST | `/api/exports` | 计划新增 | 创建 HTML/PDF/DOCX 导出任务 |
-| Export | GET | `/api/exports` | 计划新增 | 分页获取导出任务 |
-| Export | GET | `/api/exports/{job_id}` | 计划新增 | 查询导出任务 |
-| Export | GET | `/api/exports/{job_id}/file` | 计划新增 | 下载已完成产物 |
-| Export | POST | `/api/exports/{job_id}/cancel` | 计划新增 | 取消导出任务 |
+| Export | POST | `/api/exports` | 已实现（HTML/PDF/DOCX） | 创建导出任务；`html`/`pdf`/`docx` 三格式均已支持 |
+| Export | GET | `/api/exports` | 已实现 | 分页获取导出任务 |
+| Export | GET | `/api/exports/{job_id}` | 已实现 | 查询导出任务 |
+| Export | GET | `/api/exports/{job_id}/file` | 已实现 | 下载已完成产物 |
+| Export | POST | `/api/exports/{job_id}/cancel` | 已实现 | 取消导出任务 |
 | Theme | Host Contract | `ThemePackageService` | 计划新增 | 导入、预览、启停和卸载主题包 |
 | Renderer | 内部 Contract | `StaticRenderer` | 计划新增 | Mermaid/Function Plot 预览和导出复用 |
 
@@ -1080,6 +1080,8 @@ VECTOR_INDEX_REBUILD_REQUIRED
 
 ## 10. Export Service
 
+> 实现状态：HTML / PDF / DOCX 导出均已实现（`backend/app/export/`），`format` 支持 `html`/`pdf`/`docx` 三格式。`function-plot` 已支持静态 SVG 内嵌（`backend/app/plot/`），解析或渲染失败时回退为源码占位并记录 warning；Mermaid 目前仍以占位代码块保留并记 warning。PDF/DOCX 为文本优先 v1，`function-plot` 与 Mermaid 保留源码占位并记 warning。
+
 ### 10.1 创建导出任务
 
 `POST /api/exports`，返回 `202 ExportJob`。
@@ -1090,7 +1092,7 @@ VECTOR_INDEX_REBUILD_REQUIRED
     "type": "note",
     "note_id": "note_123"
   },
-  "format": "pdf",
+  "format": "html",
   "options": {
     "theme_id": "light",
     "include_title": true,
@@ -1101,7 +1103,7 @@ VECTOR_INDEX_REBUILD_REQUIRED
 }
 ```
 
-`source.type` 首批支持 `note` 和 `markdown`。`markdown` 来源用于尚未保存的预览，字段大小受限且不持久化到 Trace。`format` 固定为 `html`、`pdf`、`docx`。
+`source.type` 首批支持 `note` 和 `markdown`。`note` 来源通过 `source.note_id` 引用已建索引笔记；`markdown` 来源用于尚未保存的预览，内容放在 `source.markdown` 字段，大小限制为 200 000 字符、不持久化到 Trace。`format` 可取 `html`、`pdf`、`docx`，三格式均已实现。
 
 响应：
 
@@ -1109,11 +1111,12 @@ VECTOR_INDEX_REBUILD_REQUIRED
 {
   "job_id": "export_123",
   "status": "queued",
-  "format": "pdf",
+  "format": "html",
   "progress": null,
   "file": null,
   "warnings": [],
   "error": null,
+  "error_code": null,
   "created_at": "2026-08-31T10:30:00Z",
   "started_at": null,
   "completed_at": null
@@ -1129,14 +1132,14 @@ VECTOR_INDEX_REBUILD_REQUIRED
 | POST | `/api/exports/{job_id}/cancel` | `OperationResponse` |
 | GET | `/api/exports/{job_id}/file` | 文件流 |
 
-下载响应设置正确 `Content-Type`、经过清理的 `Content-Disposition` 文件名和 `Content-Length`。未完成、失败或过期 Job 不返回空文件。
+下载响应设置正确 `Content-Type`、经过清理的 `Content-Disposition` 文件名和 `Content-Length`。未完成、失败或过期的 Job 不返回空文件：未完成/失败返回 `EXPORT_JOB_NOT_FOUND`（404），产物过期（超过 `expires_at`）返回 `EXPORT_FILE_EXPIRED`（410）。
 
 完成 Job 的 file：
 
 ```json
 {
-  "file_name": "操作系统复习.pdf",
-  "mime_type": "application/pdf",
+  "file_name": "操作系统复习.html",
+  "mime_type": "text/html",
   "size": 1048576,
   "sha256": "...",
   "expires_at": "2026-09-01T10:30:00Z"
@@ -1219,12 +1222,12 @@ interface StaticRenderResult {
 
 ```text
 EXPORT_SOURCE_NOT_FOUND
-EXPORT_FORMAT_UNSUPPORTED
 EXPORT_OPTIONS_INVALID
 EXPORT_RENDER_FAILED
 EXPORT_UNSUPPORTED_CONTENT
 EXPORT_JOB_NOT_FOUND
 EXPORT_FILE_EXPIRED
+EXPORT_OUTPUT_TOO_LARGE
 ```
 
 ---

docs/development/Agent与任务压测报告.md

@@ -0,0 +1,156 @@
+# Agent 与任务压测报告
+
+> 日期：2026-09-06。范围：当前第二阶段 Agent Runtime、任务 API、任务列表及 Trace 组件。测试在 Windows 11、Python 3.12.6、独立无头 Chrome 下执行，前端为 Vite 开发模式，纸间时光版本 1.8.1。
+
+## 1. 结论
+
+功能正确性检查通过：Agent 工具调用、事件序号与回放、终态持久化恢复、容量拒绝、取消、权限等待、故障隔离，以及任务增删改查和分页均得到预期结果。性能仍有三项明确问题：
+
+| 优先级 | 问题 | 本轮证据 | 建议方向 |
+| --- | --- | --- | --- |
+| P1 | 任务列表未加载后续页；Agent 历史列表也没有后续分页入口 | 100、1000 条任务的实际页面均只请求 `/api/tasks` 并显示 50 条；Agent store 同样仅调用默认分页一次，接口默认 50 | 增加服务端筛选与分页/加载更多，显示总量，防止统计仅基于已加载项 |
+| P1 | 高并发 Agent 阻塞事件循环 | 200 并发的完成延迟 P95 约 10.55 秒；进程内心跳最大延迟约 3.56 秒 | 分析同步持久化，设计有界执行调度及顺序写入，保留事件落盘、终态与回放一致性 |
+| P1 | 大 Trace 的树形筛选长时间阻塞 | 2000 事件树形搜索约 483–617 ms；10000 事件约 25.91 秒 | 为匹配的 sequence/tool/model ID 建 Set，避免逐节点重复遍历事件；再评估分段显示及增量更新 |
+
+本次新增的是可复现压测与报告，没有把上述生产问题标记为已修复。页面滚动与树形搜索是不同瓶颈：10000 事件的滚动 P95 约 40 ms，并不能说明搜索交互也流畅。
+
+## 2. 隔离与方法
+
+- 后端脚本在导入任何 app 模块前，将 `APP_DATA_DIR`、`APP_DB_PATH`、`APP_VAULT_PATH` 指向临时目录，结束后清理；不读写用户 Vault、现有任务及 Provider 凭据。
+- Agent 使用内置 Mock Provider，每轮模型调用注入 50 ms 异步等待，正常样本包含一次 `system.echo` 工具调用和两轮模型调用；不调用真实厂商，也不衡量回答质量或真实模型吞吐。
+- 进程内运行直接调用真实 Runtime、SQLite 和任务 ASGI 路由。任务 HTTP 复核另起独立 Uvicorn 进程，用真实回环连接执行，避免将 ASGI 驱动的连续无让出执行误解为网络服务延迟。
+- 前端挂载真实 TasksView、TraceTimeline 和 Pinia store。压测页拦截全部 fetch，不向真实后端发出请求。任务接口夹具保留默认 50 条分页，先测实际加载条数，再注入完整列表测试渲染上限，两者分开记录。
+- Trace 由确定性模型开始/完成、工具调用/结果事件组成，带调用与父节点 ID；测量首次渲染、时间线过滤、树形切换、匹配全部节点的树形搜索。
+- 滚动用 CDP 派发 120 次滚轮事件，记录真实滚动容器及 `maxScrollTop`，防止对未滚动页面统计帧间隔。Trace 测试容器显式解除应用根节点的裁剪，由独立滚动区承担真实 Agent 页滚动容器的职责。
+
+本轮每个前端配置测一次；开发编译、后台负载、缓存和浏览器调度都会影响结果，数据用于发现瓶颈，不作为生产环境 SLA。首次渲染计时不包含模块下载，包含 Vue 更新及两个 animation frame。
+
+## 3. Agent 后端
+
+### 3.1 正常工具调用与回放
+
+| 并发数 | 运行数 | 完成延迟中位数（ms） | 完成延迟 P95（ms） | 场景心跳最大延迟（ms） |
+| ---: | ---: | ---: | ---: | ---: |
+| 1 | 20 | 146.20 | 170.13 | 26.84 |
+| 10 | 20 | 405.75 | 505.74 | 136.71 |
+| 50 | 50 | 2234.45 | 2304.42 | 798.84 |
+| 200 | 200 | 10262.47 | 10554.52 | 3559.97 |
+
+290 个正常运行全部完成，工具返回内容逐项一致；实时订阅事件序号连续，`after_sequence=2` 回放与原事件后缀一致。新的 Runtime 实例可以从 SQLite 恢复这些终态运行。订阅者集合最终清空，进程内保留记录不超过 200。
+
+“并发”是同时提交的协程数，不代表独立 CPU 工作线程。当前 queued 是启动前状态，Runtime 并没有把超额活跃运行无限排入执行队列。场景心跳还包含提交、持久化回放与恢复校验，不能将其全部归为模型执行耗时；50、200 并发场景的心跳采样数仅 8 个，表中因此列最大值而非宣称稳定分位数。
+
+代码定位：`AgentRuntime._publish()` 同步调用 `AgentTraceRepository.append_event()`，后者逐事件连接 SQLite 并提交事务；`connect()` 还加载扩展和检查迁移。这是需要进一步拆分测量的阻塞路径，本轮未完成各子步骤 CPU/磁盘成本归因。
+
+### 3.2 容量、取消与故障注入
+
+- 保持 200 个模型调用活跃，第 201 次创建得到 `AgentCapacityError`；随后取消全部 200 个运行，全部进入 cancelled，后台任务均结束。
+- 20 个运行等待权限：10 个允许后完成，10 个等待中取消，订阅者均释放。
+- 20 个混合运行：5 个正常完成、5 个 Provider 异常、5 个模型超时、5 个工具超时，均获得预期状态或错误码；工具执行器剩余数量为 0。
+- 正常回放和故障场景合计创建 530 个运行，临时数据库最终约 2.95 MB。工具超时被记录为 ToolResult 错误，后续 Mock 模型仍可能完成运行，不将它误算为整个 Run 必然失败。
+
+这里的“恢复”是新 Runtime 读取终态持久化数据，未模拟 OS 强杀时的写入中断。SSE 通过 Runtime 的事件生成器验证序号及断点回放，没有进行真实网络慢读者/断网压力测试。
+
+## 4. 任务 API
+
+进程内分别对 100、1000 条任务执行创建、逐页读取、更新为 done、删除，所有 ID 完整，最终总量为 0。默认接口每页 50 条，显式每页 100 条遍历可以取回全部数据。
+
+ASGITransport 的 1000 条突发操作中，心跳出现约 14 秒延迟：测试客户端与同步路由处于同一事件循环，连续就绪协程缺少网络等待，不能将其视作真实 HTTP 健康检查延迟。因此增加独立 Uvicorn + 回环 HTTP 复核：
+
+| 操作 | 数量 | P95（ms） | 最大值（ms） |
+| --- | ---: | ---: | ---: |
+| 创建 | 1000 | 116.45 | 134.91 |
+| 更新 | 1000 | 159.29 | 193.37 |
+| 删除 | 1000 | 156.43 | 190.10 |
+| 分页/收尾查询 | 11 | 20.96 | 20.96 |
+| 并行健康检查 | 117 | 157.00 | 195.07 |
+
+HTTP 客户端并发 20，总耗时约 18.31 秒；健康检查零失败，分页无重复/遗漏，最终任务数为 0。此处是本机单次结果，未覆盖跨网络、长期持久负载或多进程同时写同一数据库。
+
+## 5. 前端
+
+### 5.1 任务列表
+
+100、1000 条数据的实际加载阶段都只有一次 `/api/tasks` 请求，store 中均为 50 条。以下是额外注入完整 1000 条数据后的结果，不是生产页面当前可以加载 1000 条的证明。
+
+| 主题 | 完整列表渲染（ms） | 完成状态筛选（ms） |
+| --- | ---: | ---: |
+| 默认浅色 | 117.4 | 44.1 |
+| 默认深色 | 137.8 | 47.8 |
+| 纸间时光 1.8.1 | 150.0 | 59.5 |
+
+1000 条列表约 11007 个 DOM 节点，实际滚动最远达到 81000 px；筛选 done 得到 334 条，与夹具期望一致。100 条样本筛选得到 34 条，也一致。默认浅色的 1000 条滚动 P95 约 30.2 ms，纸间时光约 50.1 ms；样本数少，暂不据此认定新的单一 CSS 根因。
+
+### 5.2 Agent Trace
+
+| 事件数/主题 | 首次渲染（ms） | 时间线搜索（ms） | 树形切换（ms） | 树形全匹配搜索（ms） |
+| --- | ---: | ---: | ---: | ---: |
+| 2000 / 默认浅色 | 283.8 | 97.4 | 64.0 | 617.2 |
+| 2000 / 默认深色 | 289.0 | 74.5 | 62.9 | 483.0 |
+| 2000 / 纸间时光 | 337.3 | 86.3 | 62.1 | 540.1 |
+| 10000 / 纸间时光 | 1803.9 | 582.8 | 317.5 | 25914.8 |
+
+200 事件的树形搜索约 20–29 ms。2000 事件时间线约 20542 个 DOM 节点，10000 事件约 102542 个。查询“压力测试 1”分别命中 444、4444 条事件，与直接检查输入数据的结果一致；树形搜索“压力测试”匹配所有事件，会自动展开匹配子树。
+
+代码定位：`TraceTimeline.filteredTree` 为每个节点调用 `filteredEvents.some(...)`。节点数和匹配事件数一起增加时，会产生近似二次增长的匹配工作，随后还需构造并渲染展开子树。建议先用匹配 ID 集合消除嵌套扫描，再测 DOM 更新成本；不要仅用防抖隐藏单次 25 秒阻塞。
+
+10000 是扩大数据规模的诊断测试，高于 Runtime 默认内存事件保留量 2000；它直接向组件传入事件，不代表当前单次 API 页或实时 store 默认会收到这一数量。也未覆盖逐事件 SSE 增量刷新的端到端成本。
+
+## 6. 复现与原始数据
+
+```powershell
+# 后端：独立临时数据，离线 Mock
+backend/.venv/Scripts/python.exe backend/scripts/agent-task-stress.py --output .local-plans/agent-task-backend.json
+# 真实 HTTP：独立 Uvicorn、随机回环端口
+backend/.venv/Scripts/python.exe backend/scripts/task-http-stress.py --count 1000 --concurrency 20 --output .local-plans/task-http.json
+# 前端：先启动独立 Vite，另一个终端执行后续命令
+npm --prefix frontend run dev -- --port 5175 --strictPort
+backend/.venv/Scripts/python.exe frontend/tests/performance/run-stress.py --url 'http://127.0.0.1:5175/tests/performance/agent-task.html?kind=tasks&theme=paper-moments' --scroll --sizes 100 1000 --runs 1 --output .local-plans/task-ui.json
+backend/.venv/Scripts/python.exe frontend/tests/performance/run-stress.py --url 'http://127.0.0.1:5175/tests/performance/agent-task.html?kind=trace&theme=paper-moments' --scroll --sizes 200 2000 10000 --runs 1 --output .local-plans/trace-ui.json
+```
+
+URL 的 theme 可换为 light、dark。测试应串行运行，避免不同负载相互争用；10k Trace 树形筛选可能长时间占用测试浏览器。浏览器使用临时用户目录，不接管用户当前浏览器。
+
+- [Agent 与进程内任务 API 数据](performance/2026-09-06-agent-task-backend.json)
+- [真实 HTTP 任务数据](performance/2026-09-06-task-http.json)
+- [前端 13 组样本数据](performance/2026-09-06-agent-task-ui.json)
+- [前端压测工具](../../frontend/tests/performance/README.md)
+
+附加回归：`test_agent_core.py`、`test_api.py` 共 26 项通过。脚本中的状态、序号、输出、分页与筛选断言均通过。未提交或推送本次材料。
+
+## 7. 修复后复测（2026-09-06）
+
+以上保留首次压测基线。本节对应后台 Trace 批量写入、任务后台写入、完整列表加载、Trace 集合匹配/分页和统一日志接入后的实现。样本开启新操作日志，仍只调用隔离 Mock。
+
+| 项目 | 修复前 | 修复后 |
+| --- | ---: | ---: |
+| 200 并发 Agent 完成 P95 | 10,554.52 ms | 1,233.12 ms |
+| 200 并发测量区间事件循环最大延迟 | 3,559.97 ms | 509.00 ms |
+| 纸间时光 10k Trace 首次渲染 | 1,803.9 ms | 94.4 ms |
+| 纸间时光 10k Trace 树形全匹配筛选 | 25,914.8 ms | 189.2 ms |
+| 纸间时光 10k Trace 首屏 DOM 节点 | 约 102,542 | 1,852 |
+| 1,000 条任务首次实际加载 | 50 条 | 1,000 条（10 次 API 请求） |
+
+Agent 测量区间还包含同步读回、校验和重启恢复，最大心跳延迟不是纯执行阶段指标。290 次普通运行、200 个容量/取消场景、20 个权限场景、20 个失败/超时场景全部通过，订阅者和工具执行器释放。不能声称消除了所有主线程工作。
+
+Trace 搜索检查完整数据，只有渲染分页。10k 样本滚动 frame gap P95 为 10.1 ms，无 longtask；时间线筛选 284.9 ms，树形切换 100.9 ms。这是单次本机样本，不代表所有硬件与实时 SSE 输入。
+
+1,000 条任务界面每页 100 条；筛选后数据总数 334，当前页 100。筛选 18.7 ms，滚动 frame gap P95 为 30 ms，无 longtask。断言同时检查完整数据量和分页渲染数量。
+
+真实 HTTP 测试 1,000 条任务、20 并发，CRUD 全部成功，分页完整，最终任务数 0：
+
+| 指标 | 修复前 | 修复后 |
+| --- | ---: | ---: |
+| health P95 | 157.00 ms | 38.64 ms |
+| 创建 P95 | 116.45 ms | 157.68 ms |
+| 更新 P95 | 159.29 ms | 208.68 ms |
+| 删除 P95 | 156.43 ms | 205.45 ms |
+| 总耗时 | 18.31 s | 24.51 s |
+
+后台排队和操作记录改善了无关请求的响应，但这组样本写入吞吐下降，不能描述为 CRUD 全面提速。后续可以评估任务事务批量化与连接初始化开销；本次没有降低 SQLite 持久化级别。
+
+- [Agent / 进程内任务复测](performance/2026-09-06-agent-task-backend-fixed.json)
+- [真实 HTTP 任务复测](performance/2026-09-06-task-http-fixed.json)
+- [Trace 浏览器复测](performance/2026-09-06-agent-trace-ui-fixed.json)
+- [任务浏览器复测](performance/2026-09-06-task-ui-fixed.json)
+- [日志架构与验收说明](后台运行日志与压力问题修复.md)

docs/development/Export开发说明.md

@@ -0,0 +1,130 @@
+# Export 开发说明
+
+> 所属模块：Export Service（后端，负责人 yxx）。交付「多格式文档导出」：Markdown → HTML / PDF / DOCX 的完整生命周期与 function-plot 静态 SVG 渲染。契约对应 [第二阶段接口契约 §10](../contracts/第二阶段接口契约-开发版.md)。
+
+## 定位
+
+Export Service 把笔记或未保存的 Markdown 文本渲染为可下载的 HTML 文件。采用与 Benchmark 一致的「创建即返回 queued、后台 asyncio.Task 执行」的内存模型，产物带 24h 过期时间，过期后不可下载。导出是轮询式（无 SSE 事件流），客户端通过 `GET /api/exports/{job_id}` 轮询状态，完成后走 `GET /api/exports/{job_id}/file` 下载。
+
+## 模块布局
+
+```text
+backend/app/export/
+├── __init__.py        包说明
+├── document.py        Document AST 内部协议 + DocumentExporter Protocol + ExportResult
+├── markdown.py        mistune 'ast' renderer → Document AST
+├── exporters/
+│   ├── __init__.py
+│   ├── _common.py     共享工具（URL 协议校验 + 占位 warning 文案 + 元数据格式化）
+│   ├── html.py        HtmlExporter（Document AST → 完整 HTML5）
+│   ├── pdf.py         PdfExporter（Document AST → PDF，reportlab）
+│   └── docx.py        DocxExporter（Document AST → DOCX，python-docx）
+└── service.py         ExportService（注册表 + 后台渲染 + 取消 + 产物生命周期）
+
+backend/app/plot/
+├── parser.py          函数图像表达式解析（白名单 AST）
+├── render.py          FunctionPlot → 静态 SVG
+└── renderer.py        StaticRenderer 内部契约（§10.4）
+```
+
+HTTP DTO（`ExportStatus` / `ExportFormat` / `ExportSource` / `ExportOptions` / `ExportJob` 等）放在 [app/contracts.py](../../backend/app/contracts.py)，与 Benchmark DTO 同层；`DocumentNode` / `ExportResult` 属导出器内部协议，放在 `export/document.py`，不进入 HTTP 契约。
+
+## 接口
+
+| 方法 | 路径 | 用途 |
+| --- | --- | --- |
+| POST | `/api/exports` | 创建导出任务（202） |
+| GET | `/api/exports?status=&format=&limit=&offset=` | 分页获取任务 |
+| GET | `/api/exports/{job_id}` | 查询任务状态 |
+| GET | `/api/exports/{job_id}/file` | 下载已完成产物 |
+| POST | `/api/exports/{job_id}/cancel` | 取消任务 |
+
+`source.type` 支持 `note`（引用已建索引笔记）与 `markdown`（未保存预览，字段为 `source.markdown`，上限 200 000 字符）。`format` 支持 `html` / `pdf` / `docx` 三种，经 `service._EXPORTERS` 注册表按格式分发到对应导出器。
+
+## Markdown → Document AST
+
+解析用 [mistune](https://github.com/lepture/mistune) 的内置 `renderer="ast"`（非自写 `BaseRenderer`），因为 mistune 的行内渲染按字符串拼接、无法承载结构化子节点；ast renderer 直接给出带 `children`/`attrs`/`raw` 的 token 树，`_AstMapper` 只做 token → `DocumentNode` 的搬运，不掺入任何 HTML。插件启用 `table`、`math`、`url`、`task_lists`。
+
+fenced code 按语言分流：`mermaid` → `mermaid` 节点、`function_plot`/`functionplot` → `function_plot` 节点，其余 → `code_block`（`attributes.language`）。`node_id` 按遍历顺序 `node_{seq:03d}` 生成，仅渲染内部使用，无需跨请求稳定。
+
+## HtmlExporter
+
+递归渲染 Document AST 为完整 HTML5 文档（`<!doctype html>` + `<head>` 内嵌基础 CSS + `<body>`），标题/正文/元信息文本一律 `html.escape`。`function_plot` 经 `FunctionPlotStaticRenderer` 解析为静态 SVG 内嵌（解析/渲染失败或超限时回退 `<pre class="function-plot">` 占位并记 warning），`mermaid` 无法静态表达，渲染为占位 `<pre class="mermaid">` 并记 warning，均不静默丢失；`code_theme` 仅作为代码容器 class，不引入 JS 高亮库。无法表示的节点统一 `warnings.append(...)` 跳过。
+
+## StaticRenderer 内部契约（§10.4）
+
+函数图像与 Mermaid 的静态渲染统一收敛到 `app/plot/renderer.py`：
+
+- `StaticRenderRequest`（`kind` / `source` / `source_hash` / `theme` / `width` / `height`）是统一的渲染请求载体，`source_hash` 供缓存/去重，`theme` 供主题化渲染。
+- `StaticRenderer` Protocol 定义 `render(request) -> StaticRenderResult`，导出器只面向协议，不直接调用 `render_svg`。
+- `FunctionPlotStaticRenderer` 委托 `parse_source` 解析 + `render_svg` 输出内嵌 SVG；`parse` 与 `render_plot` 拆开，供导出器在渲染前先拿 `node_count` 做文档级累计复杂度预算。
+- `MermaidStaticRenderer` 后端无 Mermaid 渲染能力，返回空占位结果并记 warning，交由前端渲染。
+
+## PDF / DOCX 导出器（v1 文本优先）
+
+`PdfExporter`（reportlab platypus）与 `DocxExporter`（python-docx）实现与 HtmlExporter 一致的同步 `render(document, options) -> ExportResult` + 异步 `export`。v1 为文本优先，覆盖标题/段落/行内强调与链接/列表/引用/表格/代码块/数学文本；`function_plot` 与 `mermaid` 保留源码占位并记 warning（与现有 Mermaid 处理一致）。
+
+- PDF 中文字体用 reportlab 内置 `STSong-Light` CID 字体，无外部字体依赖；CID 字体无独立 bold/italic 字重，行内强调退化为普通文本（内容不丢、样式简化），标题靠字号区分层级。
+- DOCX 通过 Normal 样式挂载 `w:eastAsia=宋体` 保证中文显示，bold/italic 由 Word 原生渲染；链接写入可点击的 `w:hyperlink` run。
+- 扩展名/MIME：html→`.html`/`text/html`，pdf→`.pdf`/`application/pdf`，docx→`.docx`/`application/vnd.openxmlformats-officedocument.wordprocessingml.document`；路由 `FileResponse` 按 `mime_type` + `file_name` 通用化，无需改路由。
+
+## 运行生命周期
+
+`queued → running → completed | failed | cancelled`。
+
+- 创建时校验：`note` 源不存在 → `EXPORT_SOURCE_NOT_FOUND`（404）；`markdown` 源为空或超上限 → `EXPORT_OPTIONS_INVALID`。
+- 内存注册表上限 `MAX_JOBS=100`，超限只淘汰终态任务；满容量且全为活动任务时返回 `EXPORT_CAPACITY_EXCEEDED`（429）。
+- 后台渲染在解析前后各让出一次执行权，使「创建后立即取消」的 queued 任务能及时进入 cancelled。
+- 失败只向公开响应暴露项目错误码与安全消息，详细异常进入日志。
+
+## 产物生命周期
+
+产物写入 `settings.exports_path`（默认 `backend/data/exports/`，可通过 `APP_EXPORTS_PATH` 覆盖，已加入 `.gitignore`），文件名为 `{job_id}{ext}`（`ext` 由格式决定），下载 `Content-Disposition` 用 `_safe_download_name` 清洗标题得到。`ExportFile` 记录 `sha256`、`size` 与 `expires_at`（`completed_at + 24h`），过期返回 `EXPORT_FILE_EXPIRED`（410）。
+
+## 资源上限
+
+为防止超大输入或海量函数图像耗尽内存/线程，导出链路内置以下上限：
+
+- 输入源（`note` 与 `markdown`）统一限制 `MAX_MARKDOWN_CHARS = 200_000` 字符，超限返回 `EXPORT_OPTIONS_INVALID`。
+- 单个 `function-plot` 图块最多 16 条表达式，超限整块回退占位并记结构化诊断 `FUNCTION_PLOT_TOO_MANY_EXPRESSIONS`。
+- 单篇文档最多 16 个函数图像，超出部分回退占位并记 warning。
+- 单篇文档累计函数图像 AST 节点预算 `_MAX_TOTAL_PLOT_NODES = 8000`，超出部分回退占位并记 warning，防止多图块 × 多表达式 × 深表达式组合在采样求值时长时间占满 CPU。
+- 并发渲染上限 `MAX_CONCURRENT_RENDERS = 2`，解析/渲染是 CPU 密集工作，超出限额的任务在内存中排队等待渲染槽位，避免大量任务同时占满工作线程与内存。
+- 最终产物大小上限 `MAX_EXPORT_BYTES = 20 MB`，超限任务标记 failed 并返回 `EXPORT_OUTPUT_TOO_LARGE`。
+
+## 错误码
+
+错误分两类：**同步错误**在创建/查询请求的 HTTP 响应里直接返回对应状态码；**异步任务错误**在创建时已返回 `202`，后续轮询 `GET /api/exports/{job_id}` 仍返回 `200`，错误通过任务状态与 `error_code` 字段暴露，**不映射 HTTP 状态码**。
+
+同步错误：
+
+```text
+EXPORT_SOURCE_NOT_FOUND      404
+EXPORT_OPTIONS_INVALID       400
+EXPORT_UNSUPPORTED_CONTENT   422（预留）
+EXPORT_JOB_NOT_FOUND         404
+EXPORT_FILE_EXPIRED          410
+EXPORT_CAPACITY_EXCEEDED     429
+```
+
+异步任务错误（轮询返回 `200`，字段形如 `{"status": "failed", "error_code": "..."}`）：
+
+```text
+EXPORT_RENDER_FAILED
+EXPORT_OUTPUT_TOO_LARGE
+```
+
+## 测试
+
+```powershell
+cd backend
+uv run pytest -q
+```
+
+`tests/test_export.py` 覆盖 Markdown 解析（标题/行内/列表/代码分流/表格/数学）、HTML 渲染（标签 + 转义 + warning）、Service 端到端（note 源与 markdown 源、PDF/DOCX 魔法字节与 CJK 字体、引用块正文与嵌套列表顺序等结构内容回归、排队任务取消、未知 note、取消、list/get、过期 410）与 `ExportSource` 契约校验。`tests/test_plot.py` 覆盖表达式解析/求值、SVG 渲染与 `StaticRenderer` 契约（函数图像渲染、Mermaid 占位）。
+
+## 范围外（后续 PR）
+
+- PDF 内嵌函数图像与 Mermaid 渲染（v1 仅源码占位）。
+- 函数图像交互预览与缩放（前端 JS Renderer 负责，后端仅提供静态 SVG）。
+- 代码语法高亮（当前仅 CSS class 占位）。

docs/development/Knowledge与Retrieval-Core开发说明.md

@@ -235,3 +235,9 @@ rag.search
 - RAG Benchmark 已建立：`POST /api/benchmarks/rag/runs` 创建即返回 queued、后台 Task 执行，
   通过 SSE 实时推送进度，报告含逐 Case 结果与 `total_cases` / `successful_cases` / `failed_cases` / `failure_rate`。
 - Agent Benchmark 暂缓，待 Agent Runtime 完成后交付。
+
+## 2026-09-06 实现补充
+
+上文的 MVP 同步说明是早期基线。当前打开 Vault 和 HTTP PATCH 保存已拆分即时元数据 / FTS 与后台向量计算；手动全量重建仍等待完成。生产 Embedding 使用实际模型和隔离向量空间，HashEmbedding 仅用于测试。
+
+后续维护以 [工作区后台索引与保存开发说明](工作区后台索引与保存开发说明.md) 的实现边界、状态和验证步骤为准。

docs/development/Markdown渲染检查.md

@@ -30,6 +30,14 @@
 | 自定义字号 span | 装饰渲染 | 清理后 HTML | 既有字号标记测试 |
 | 原始 HTML | 编辑器按自身 HTML 节点规则保留 | 清理后展示，脚本及事件属性移除 | 新增安全 HTML 测试 |
 
-源码模式展示 Markdown 原文，不隐藏反引号、星号和围栏。脚注、定义列表、Wiki 双链、Obsidian callout、图表以外的自定义围栏等未作为独立渲染扩展启用，不在“已支持”范围内。
+源码模式展示 Markdown 原文，不隐藏反引号、星号和围栏。脚注、定义列表、Wiki 双链、图表以外的自定义围栏等未作为独立渲染扩展启用，不在“已支持”范围内。
+
+2026-09-06 补充：GitHub alerts 与 Obsidian callout 已在工作区和静态预览接入，包含常用类型/别名、自定义标题、嵌套与折叠。语法、命令接口与验证方法见 [警告框与桌面编辑命令开发说明](警告框与桌面编辑命令开发说明.md)。
 
 自动检查覆盖解析、DOM 输出、部分编辑交互、保存往返和主题变量。尚未完成所有浏览器、所有输入法及每个主题的逐页截图比对；不能据此宣称像素级视觉验收通过。测试使用隔离样例，没有修改用户笔记。
+
+## 2026-09-06 Mermaid 补充
+
+补齐大图居中与完整适配、显示宽度缩放基准、滚轮速度限制、鼠标位置补偿及重开滚动位置清理。修复 Milkdown 段落内边距挤出 foreignObject 标签框的问题，浏览器核对 1、many、contains 完整显示。
+
+实现原理、测试命令和视觉复核步骤见 [Mermaid 预览与缩放开发说明](Mermaid预览与缩放开发说明.md)。

docs/development/Markdown语法预设与外部文件刷新.md

@@ -0,0 +1,48 @@
+# Markdown 语法预设与外部文件刷新
+
+日期：2026-09-06。
+
+## 1. 设置入口与范围
+
+“设置 → 编辑器 → Markdown 语法预设”管理语法与编辑行为，独立于“标题样式”的字号、字体和字重设置。
+
+支持 ATX/Setext 标题、无序列表标记、有序列表递增、代码围栏、裸链接识别、数学公式、警告框、Mermaid、代码行号、自动换行、缩进和工具栏新建代码块的默认语言。Setext 只作用于 H1/H2。提供扩展、GitHub 和基础三组内置配置，支持最多 20 个命名自定义预设，同名保存替换旧配置。
+
+配置保存在本机 localStorage 的 `markdown-preferences`，读取时校验。静态预览即时应用；写作编辑器在下次打开时应用，避免切换设置重建正在编辑的文档。写作模式保存会统一整篇正文的语法标记，源码模式保留手写语法。关闭扩展后对应内容按普通 Markdown/代码展示。
+
+本次不是完整复制 Typora：未提供上下标、高亮、智能标点、physics 包及导出公式选项。基础配置仍支持现有 GFM 表格等功能。
+
+## 2. 主题与折叠
+
+六个主题共用语义颜色和表单控件。内置浅色、深色、护眼更新为 1.3.0；纸间时光 1.8.0；Ocean Blue 1.5.0；Midnight Purple 2.3.0。社区预览增加语法控件和标题折叠样本。
+
+标题箭头使用统一 CSS 形状，默认隐藏，悬停标题或键盘聚焦按钮时显示；无悬停能力的触摸设备保持可见。用户自定义标题外观独立于主题配色。
+
+## 3. 外部文件刷新与保存保护
+
+Web 当前采用串行后台轮询：前一次完成后间隔两秒，在窗口聚焦时也检查。隐藏页面暂停读取，卸载移除监听。此机制不是原生文件事件监听；第三阶段可由 Tauri 文件事件替代。
+
+`GET /workspace/tree` 检查磁盘新增、删除和重命名，为新文件登记元数据及全文索引，向量任务继续后台执行。前端保留文件夹展开状态，并丢弃过期请求响应。读取失败保留旧树并显示重试入口。
+
+当前打开且未修改的文件检测到外部正文变化后更新编辑器；存在本地编辑时保留缓冲区，停止自动保存并提示冲突。重新加载磁盘版本需要用户确认。原文件删除或移动后，隐藏不可用的重新加载入口，提供下载当前 Markdown 副本和确认关闭笔记；取消关闭或确认期间正文改变时保留缓冲区。关闭后可重新选择其他文件，不再阻塞导航。`PATCH /notes/{note_id}` 新增可选 `expected_content_hash`（原始正文 UTF-8 SHA-256，64 位小写十六进制），保存前校验，不匹配返回 `NOTE_CONTENT_CONFLICT`，防止覆盖外部修改。
+
+范围限制：现有文件的外部正文修改会刷新当前编辑器，但本轮目录检查不会据此重建其搜索索引；可通过重建索引同步检索内容。
+
+## 4. 验证方法
+
+```powershell
+cd frontend
+npm run test
+npm run build
+cd ..
+backend/.venv/Scripts/python.exe -m pytest backend/tests/test_workspace.py backend/tests/test_workspace_background.py -q -p no:cacheprovider
+```
+
+手工验证：
+
+1. 保存并重新应用命名预设，刷新后确认保留；重新打开笔记，检查 Setext、列表和代码围栏的源码。
+2. 切换六个主题，在社区预览和工作区检查控件、警告框、标题箭头；移出标题后箭头隐藏，Tab 聚焦仍可操作。
+3. 在系统文件管理器新增、重命名、删除 Markdown 文件，保持前端可见，确认树自动更新且目录展开状态保留。
+4. 分别在正文未修改、有未保存编辑时从外部修改同一文件，验证自动加载与冲突保护；拒绝重新加载应保留编辑内容。
+
+本次自动验证覆盖预设持久化、解析选项隔离、写作语法输出、标题折叠、树刷新竞态、外部文件登记及保存冲突。

docs/development/Mermaid预览与缩放开发说明.md

@@ -0,0 +1,46 @@
+# Mermaid 预览与缩放开发说明
+
+> 本文档用于前端开发和图表渲染联调。
+>
+> 更新日期：2026-09-06。代码基线：`a5c44c4`。
+
+## 当前实现
+
+工作区和静态 Markdown 通过 `mermaidService.ts` 串行渲染，使用主题变量与 Mermaid strict 模式。工作区由 `mermaidPreview.ts` 发布当前版本预览；`DiagramInteractions.vue` 提供缩放和大图交互。
+
+- 行内按钮在悬停或键盘焦点进入时显示；触屏保留操作入口。
+- 行内中键点击 SVG 后进入滚轮缩放，移动鼠标或窗口失焦退出。
+- 大图直接使用滚轮缩放，缩放范围为 20%～500%。
+- 行内首次缩放以实际显示宽度为基准，避免受容器限制的图表跳回原始宽度。
+- 大图打开时根据原始比例与可用窗口宽高确定 100% 基准，清除旧滚动位置并居中；100% 不一定等于 SVG 原始像素宽度。
+- 滚轮增量按时间和 delta 限制，宽度变化使用 180ms 过渡；支持减少动态效果偏好。
+- 过渡期间根据鼠标位置补偿内外滚动容器。受滚动边界限制时，不能保证鼠标锚点在任意位置绝对不动。
+
+## 文字裁切的原因与修复
+
+Mermaid 的 HTML 标签放在固定尺寸的 SVG `foreignObject` 中。Milkdown 的正文段落规则会给内部 p 增加上下各 4px 内边距，导致关系标注超出文字框。工作区现在对图表内部 p 清除段落内边距和外边距，并继承图表行高、字重。
+
+大图复制 SVG 时保留 `foreignObject`，先清理嵌入 HTML，再清理整个 SVG，移除脚本及事件属性。不能为了保留标签而关闭安全清理。
+
+类图未声明方法时，其方法区为空是正常结构。排查时应先对照源码，再检查 DOM 标签、尺寸和裁切范围。
+
+## 验证方法
+
+在 frontend 目录执行：
+
+```powershell
+pnpm exec vitest run src/components/common/DiagramInteractions.spec.ts src/features/editor/diagramIntegration.spec.ts src/features/editor/mermaidPreview.spec.ts
+pnpm exec vue-tsc -b
+```
+
+使用 Vault 中“功能演示/03 Mermaid 图表集.md”手动检查：
+
+1. 检查流程图、时序图、类图、状态图、ER 图和甘特图。
+2. 类图的 1、many、contains 应完整显示；查看内部 p 的 padding 应为 0。
+3. 甘特图大图初始应完整适配；放大后可通过滚动条查看超出部分。
+4. 连续滚轮输入不应首次跳大；移动鼠标后行内滚轮模式退出。
+5. 关闭并重开大图，不保留上次滚动位置。
+
+浏览器实测中，关系标注文字高度约 16.5px，对应 16.5px 的 SVG 标签框；contains 约 24px，对应 24px 框。该结果不替代所有主题、字体、浏览器的视觉验收。
+
+相关格式范围见 [Markdown 渲染检查](Markdown渲染检查.md)。

docs/development/Plugin-Command与Settings开发说明.md

@@ -115,3 +115,9 @@ pnpm build
 阶段 D 测试覆盖注册/注销生命周期、位置过滤、参数与 Context 校验、上下文裁剪、设置影响命令执行、声明式 Secret Resolver 与越权拒绝、真实 MCP Command Target 与 Agent Tool 隔离、必填 Secret 传递、外部 Schema 引用拒绝、定长 Secret Reference、篡改引用的跨命名空间阻断、Secret 删除与卸载失败回滚、Provider/通用凭据命名空间隔离、五类设置字段、Schema 版本冲突、Secret 密文与清理、损坏存储、空 Command 列表等无效贡献文件、OpenAPI 路径、前端 Service 请求格式、Host 状态展示和动态 Secret 表单。
 
 生产构建仍会报告现有大 Chunk 警告，不影响构建成功；该问题属于前端按路由和 Markdown 依赖拆包的后续性能任务。
+
+## 2026-09-06 安装状态补充
+
+ZIP 导入和安装日志已接入。安装路径、包摘要、启用状态及 Plugin 授权可以在本地恢复；用户目录安装源与受管理 ZIP 解压目录使用不同卸载边界。功能示例包已入库，远程社区服务仍属计划。
+
+详见 [扩展安装持久化与社区包开发说明](扩展安装持久化与社区包开发说明.md)。

docs/development/performance/2026-09-06-agent-task-backend-fixed.json

@@ -0,0 +1,230 @@
+{
+  "python": "3.12.6",
+  "platform": "Windows-11-10.0.26100-SP0",
+  "provider": "mock with 50 ms injected delay per model turn; no network",
+  "results": [
+    {
+      "scenario": "agent_tool_runs",
+      "concurrency": 1,
+      "runs": 20,
+      "latency": {
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+        "median_ms": 150.79,
+        "p95_ms": 169.57,
+        "max_ms": 178.52
+      },
+      "completed": 20,
+      "ordered_events_and_replay": true,
+      "terminal_recovery": true,
+      "retained_records": 20,
+      "elapsed_ms": 3047.59,
+      "event_loop_lag": {
+        "count": 995,
+        "median_ms": 0,
+        "p95_ms": 5.65,
+        "max_ms": 21.83
+      }
+    },
+    {
+      "scenario": "agent_tool_runs",
+      "concurrency": 10,
+      "runs": 20,
+      "latency": {
+        "count": 20,
+        "median_ms": 187.48,
+        "p95_ms": 214.02,
+        "max_ms": 214.58
+      },
+      "completed": 20,
+      "ordered_events_and_replay": true,
+      "terminal_recovery": true,
+      "retained_records": 40,
+      "elapsed_ms": 514.15,
+      "event_loop_lag": {
+        "count": 192,
+        "median_ms": 0,
+        "p95_ms": 4.82,
+        "max_ms": 20.02
+      }
+    },
+    {
+      "scenario": "agent_tool_runs",
+      "concurrency": 50,
+      "runs": 50,
+      "latency": {
+        "count": 50,
+        "median_ms": 364.9,
+        "p95_ms": 366.99,
+        "max_ms": 367.3
+      },
+      "completed": 50,
+      "ordered_events_and_replay": true,
+      "terminal_recovery": true,
+      "retained_records": 90,
+      "elapsed_ms": 526.56,
+      "event_loop_lag": {
+        "count": 172,
+        "median_ms": 0,
+        "p95_ms": 4.57,
+        "max_ms": 69.89
+      }
+    },
+    {
+      "scenario": "agent_tool_runs",
+      "concurrency": 200,
+      "runs": 200,
+      "latency": {
+        "count": 200,
+        "median_ms": 1118.63,
+        "p95_ms": 1233.12,
+        "max_ms": 1237.31
+      },
+      "completed": 200,
+      "ordered_events_and_replay": true,
+      "terminal_recovery": true,
+      "retained_records": 200,
+      "elapsed_ms": 1839.2,
+      "event_loop_lag": {
+        "count": 470,
+        "median_ms": 0,
+        "p95_ms": 2.6,
+        "max_ms": 509.0
+      }
+    },
+    {
+      "scenario": "capacity_and_cancel",
+      "active_limit": 200,
+      "overflow_rejected": true,
+      "cancelled": 200,
+      "cancel_latency": {
+        "count": 200,
+        "median_ms": 7.71,
+        "p95_ms": 10.8,
+        "max_ms": 17.37
+      },
+      "elapsed_ms": 3613.48,
+      "event_loop_lag": {
+        "count": 1613,
+        "median_ms": 0,
+        "p95_ms": 0,
+        "max_ms": 7.86
+      }
+    },
+    {
+      "scenario": "permission_wait",
+      "runs": 20,
+      "approved_completed": 10,
+      "cancelled_waiting_permission": 10,
+      "subscribers_released": true,
+      "elapsed_ms": 388.83,
+      "event_loop_lag": {
+        "count": 72,
+        "median_ms": 0,
+        "p95_ms": 9.9,
+        "max_ms": 15.27
+      }
+    },
+    {
+      "scenario": "failure_and_timeout_isolation",
+      "runs": 20,
+      "success": 5,
+      "provider_errors": 5,
+      "model_timeouts": 5,
+      "tool_timeouts": 5,
+      "remaining_tool_executors": 0,
+      "elapsed_ms": 1295.29,
+      "event_loop_lag": {
+        "count": 152,
+        "median_ms": 0,
+        "p95_ms": 7.2,
+        "max_ms": 17.24
+      }
+    },
+    {
+      "scenario": "task_api_crud",
+      "tasks": 100,
+      "client_concurrency": 20,
+      "latencies": {
+        "create": {
+          "count": 100,
+          "median_ms": 214.09,
+          "p95_ms": 264.51,
+          "max_ms": 309.99
+        },
+        "update": {
+          "count": 100,
+          "median_ms": 221.48,
+          "p95_ms": 403.74,
+          "max_ms": 495.1
+        },
+        "list": {
+          "count": 1,
+          "median_ms": 7.92,
+          "p95_ms": 7.92,
+          "max_ms": 7.92
+        },
+        "delete": {
+          "count": 100,
+          "median_ms": 232.9,
+          "p95_ms": 468.48,
+          "max_ms": 475.63
+        }
+      },
+      "default_page_count": 50,
+      "default_total": 100,
+      "pagination_complete": true,
+      "final_total": 0,
+      "elapsed_ms": 3673.22,
+      "event_loop_lag": {
+        "count": 2337,
+        "median_ms": 0,
+        "p95_ms": 0,
+        "max_ms": 118.92
+      }
+    },
+    {
+      "scenario": "task_api_crud",
+      "tasks": 1000,
+      "client_concurrency": 20,
+      "latencies": {
+        "create": {
+          "count": 1000,
+          "median_ms": 200.87,
+          "p95_ms": 237.75,
+          "max_ms": 376.8
+        },
+        "update": {
+          "count": 1000,
+          "median_ms": 220.04,
+          "p95_ms": 260.19,
+          "max_ms": 300.07
+        },
+        "list": {
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+          "median_ms": 7.89,
+          "p95_ms": 9.61,
+          "max_ms": 9.61
+        },
+        "delete": {
+          "count": 1000,
+          "median_ms": 218.1,
+          "p95_ms": 266.23,
+          "max_ms": 316.14
+        }
+      },
+      "default_page_count": 50,
+      "default_total": 1000,
+      "pagination_complete": true,
+      "final_total": 0,
+      "elapsed_ms": 32562.93,
+      "event_loop_lag": {
+        "count": 24893,
+        "median_ms": 0,
+        "p95_ms": 0,
+        "max_ms": 91.85
+      }
+    }
+  ],
+  "database_bytes": 2981888,
+  "complete": true
+}

docs/development/performance/2026-09-06-agent-task-backend.json

@@ -0,0 +1,230 @@
+{
+  "python": "3.12.6",
+  "platform": "Windows-11-10.0.26100-SP0",
+  "provider": "mock with 50 ms injected delay per model turn; no network",
+  "results": [
+    {
+      "scenario": "agent_tool_runs",
+      "concurrency": 1,
+      "runs": 20,
+      "latency": {
+        "count": 20,
+        "median_ms": 146.2,
+        "p95_ms": 170.13,
+        "max_ms": 171.23
+      },
+      "completed": 20,
+      "ordered_events_and_replay": true,
+      "terminal_recovery": true,
+      "retained_records": 20,
+      "elapsed_ms": 3041.03,
+      "event_loop_lag": {
+        "count": 190,
+        "median_ms": 5.64,
+        "p95_ms": 16.81,
+        "max_ms": 26.84
+      }
+    },
+    {
+      "scenario": "agent_tool_runs",
+      "concurrency": 10,
+      "runs": 20,
+      "latency": {
+        "count": 20,
+        "median_ms": 405.75,
+        "p95_ms": 505.74,
+        "max_ms": 539.28
+      },
+      "completed": 20,
+      "ordered_events_and_replay": true,
+      "terminal_recovery": true,
+      "retained_records": 40,
+      "elapsed_ms": 1045.19,
+      "event_loop_lag": {
+        "count": 15,
+        "median_ms": 57.63,
+        "p95_ms": 136.71,
+        "max_ms": 136.71
+      }
+    },
+    {
+      "scenario": "agent_tool_runs",
+      "concurrency": 50,
+      "runs": 50,
+      "latency": {
+        "count": 50,
+        "median_ms": 2234.45,
+        "p95_ms": 2304.42,
+        "max_ms": 2307.54
+      },
+      "completed": 50,
+      "ordered_events_and_replay": true,
+      "terminal_recovery": true,
+      "retained_records": 90,
+      "elapsed_ms": 2552.49,
+      "event_loop_lag": {
+        "count": 8,
+        "median_ms": 345.24,
+        "p95_ms": 798.84,
+        "max_ms": 798.84
+      }
+    },
+    {
+      "scenario": "agent_tool_runs",
+      "concurrency": 200,
+      "runs": 200,
+      "latency": {
+        "count": 200,
+        "median_ms": 10262.47,
+        "p95_ms": 10554.52,
+        "max_ms": 10584.03
+      },
+      "completed": 200,
+      "ordered_events_and_replay": true,
+      "terminal_recovery": true,
+      "retained_records": 200,
+      "elapsed_ms": 11442.28,
+      "event_loop_lag": {
+        "count": 8,
+        "median_ms": 1647.87,
+        "p95_ms": 3559.97,
+        "max_ms": 3559.97
+      }
+    },
+    {
+      "scenario": "capacity_and_cancel",
+      "active_limit": 200,
+      "overflow_rejected": true,
+      "cancelled": 200,
+      "cancel_latency": {
+        "count": 200,
+        "median_ms": 4.32,
+        "p95_ms": 5.36,
+        "max_ms": 8.27
+      },
+      "elapsed_ms": 3645.04,
+      "event_loop_lag": {
+        "count": 3,
+        "median_ms": 14.04,
+        "p95_ms": 3610.52,
+        "max_ms": 3610.52
+      }
+    },
+    {
+      "scenario": "permission_wait",
+      "runs": 20,
+      "approved_completed": 10,
+      "cancelled_waiting_permission": 10,
+      "subscribers_released": true,
+      "elapsed_ms": 971.64,
+      "event_loop_lag": {
+        "count": 11,
+        "median_ms": 49.09,
+        "p95_ms": 314.46,
+        "max_ms": 314.46
+      }
+    },
+    {
+      "scenario": "failure_and_timeout_isolation",
+      "runs": 20,
+      "success": 5,
+      "provider_errors": 5,
+      "model_timeouts": 5,
+      "tool_timeouts": 5,
+      "remaining_tool_executors": 0,
+      "elapsed_ms": 1531.14,
+      "event_loop_lag": {
+        "count": 83,
+        "median_ms": 5.17,
+        "p95_ms": 27.82,
+        "max_ms": 255.96
+      }
+    },
+    {
+      "scenario": "task_api_crud",
+      "tasks": 100,
+      "client_concurrency": 20,
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docs/development/performance/2026-09-06-agent-task-ui.json

@@ -0,0 +1,706 @@
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docs/development/performance/2026-09-06-agent-trace-ui-fixed.json

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docs/development/performance/2026-09-06-long-document-after.json

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+]

docs/development/performance/2026-09-06-scroll-after.json

@@ -0,0 +1,122 @@
+[
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+]

docs/development/performance/2026-09-06-scroll-baseline.json

@@ -0,0 +1,119 @@
+[
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+  },
+  {
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+      "max": 170.19999999999982
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+  {
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+    "foldedScrollTop": 0,
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+  }
+]

docs/development/performance/2026-09-06-scroll-theme-comparison.json

@@ -0,0 +1,150 @@
+{
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+    "theme": "light",
+    "variant": "default",
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+    "theme": "dark",
+    "variant": "default",
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+      "variant": "default",
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+      "theme": "paper-moments",
+      "variant": "default",
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+        "max": 90.09999999999991
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+    }
+  ],
+  "outlineDisabled": [
+    {
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+      "variant": "no-outline",
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+      "theme": "paper-moments",
+      "variant": "no-outline",
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+  ]
+}

docs/development/performance/2026-09-06-scroll-token-cache.json

@@ -0,0 +1,66 @@
+[
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+  {
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+    "theme": "paper-moments",
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+    "foldedScrollTop": 0,
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+    "repeat": 2
+  }
+]

docs/development/performance/2026-09-06-sqlite-vec-search.json

@@ -0,0 +1,29 @@
+{
+  "blocks": 4000,
+  "dimensions": 384,
+  "top_k": 20,
+  "migration_ms": 1329.5076999929734,
+  "same_top_k": true,
+  "measurements": {
+    "python_json_scan": {
+      "median_ms": 1289.638800022658,
+      "samples_ms": [
+        1289.638800022658,
+        1238.6701999930665,
+        1115.6752999813762,
+        1436.7559000093024,
+        1833.9683999947738
+      ]
+    },
+    "sqlite_vec": {
+      "median_ms": 19.673499977216125,
+      "samples_ms": [
+        29.709700000239536,
+        17.876600002637133,
+        35.13619999284856,
+        19.673499977216125,
+        18.28439999371767
+      ]
+    }
+  }
+}

docs/development/performance/2026-09-06-task-http-fixed.json

@@ -0,0 +1,36 @@
+{
+  "transport": "real loopback HTTP, separate Uvicorn process",
+  "tasks": 1000,
+  "concurrency": 20,
+  "elapsed_ms": 24509.81,
+  "latencies": {
+    "create": {
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+      "p95_ms": 157.68,
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+    },
+    "update": {
+      "count": 1000,
+      "p95_ms": 208.68,
+      "max_ms": 259.91
+    },
+    "list": {
+      "count": 11,
+      "p95_ms": 23.39,
+      "max_ms": 23.39
+    },
+    "delete": {
+      "count": 1000,
+      "p95_ms": 205.45,
+      "max_ms": 279.12
+    },
+    "health": {
+      "count": 375,
+      "p95_ms": 38.64,
+      "max_ms": 164.76
+    }
+  },
+  "health_errors": [],
+  "pagination_complete": true,
+  "final_total": 0
+}

docs/development/performance/2026-09-06-task-http.json

@@ -0,0 +1,36 @@
+{
+  "transport": "real loopback HTTP, separate Uvicorn process",
+  "tasks": 1000,
+  "concurrency": 20,
+  "elapsed_ms": 18312.92,
+  "latencies": {
+    "create": {
+      "count": 1000,
+      "p95_ms": 116.45,
+      "max_ms": 134.91
+    },
+    "update": {
+      "count": 1000,
+      "p95_ms": 159.29,
+      "max_ms": 193.37
+    },
+    "list": {
+      "count": 11,
+      "p95_ms": 20.96,
+      "max_ms": 20.96
+    },
+    "delete": {
+      "count": 1000,
+      "p95_ms": 156.43,
+      "max_ms": 190.1
+    },
+    "health": {
+      "count": 117,
+      "p95_ms": 157.0,
+      "max_ms": 195.07
+    }
+  },
+  "health_errors": [],
+  "pagination_complete": true,
+  "final_total": 0
+}

docs/development/performance/2026-09-06-task-ui-fixed.json

@@ -0,0 +1,70 @@
+[
+  {
+    "kind": "tasks",
+    "theme": "paper-moments",
+    "size": 1000,
+    "initialRenderMs": 173,
+    "requests": [
+      "/api/tasks?limit=100&offset=0",
+      "/api/tasks?limit=100&offset=100",
+      "/api/tasks?limit=100&offset=200",
+      "/api/tasks?limit=100&offset=300",
+      "/api/tasks?limit=100&offset=400",
+      "/api/tasks?limit=100&offset=500",
+      "/api/tasks?limit=100&offset=600",
+      "/api/tasks?limit=100&offset=700",
+      "/api/tasks?limit=100&offset=800",
+      "/api/tasks?limit=100&offset=900"
+    ],
+    "initialTaskCount": 1000,
+    "fullListRenderMs": 85.39999997615814,
+    "fullListIsInjected": true,
+    "renderedTasks": 100,
+    "domNodes": 1111,
+    "scrollContainers": [
+      {
+        "node": "HTML",
+        "height": 905,
+        "scrollHeight": 905,
+        "overflow": "hidden",
+        "position": "static"
+      },
+      {
+        "node": "BODY",
+        "height": 905,
+        "scrollHeight": 905,
+        "overflow": "hidden",
+        "position": "static"
+      },
+      {
+        "node": "viewport",
+        "height": 905,
+        "scrollHeight": 905,
+        "overflow": "auto",
+        "position": "static"
+      },
+      {
+        "node": "app",
+        "height": 905,
+        "scrollHeight": 905,
+        "overflow": "hidden",
+        "position": "static"
+      }
+    ],
+    "frameGapsMs": {
+      "median": 10,
+      "p95": 30,
+      "max": 50.10000000000002
+    },
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+    "longTasks": [],
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+    "scrollHeight": 11798,
+    "maxScrollTop": 10941,
+    "filteredCount": 100,
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+    "filterMs": 18.69999998807907,
+    "repeat": 1
+  }
+]

docs/development/主题组件覆盖检查.md

@@ -1,5 +1,28 @@
 # 主题组件覆盖检查（2026-09-05）
 
+## 2026-09-06：Markdown 行为与文档滚动适配
+
+| 主题 | 当前版本 |
+| --- | --- |
+| Light / Dark / Sepia | 1.4.0 |
+| 纸间时光 | 1.9.0 |
+| Ocean Blue | 1.6.0 |
+| Midnight Purple | 2.4.0 |
+
+新增共享 `frontend/src/styles/markdown-behavior.css`，由应用入口及隔离主题预览同时加载。六个主题通过语义变量提供链接悬停与键盘焦点、任务复选框、引用与分隔线、文字选区、表格选区、标题折叠状态、警告框折叠状态和文档滚动按钮配色。标题箭头沿用悬停或键盘聚焦时显示的规则；表格选区采用透明叠色，避免遮住单元格文字。纸间时光保留长文轻量背景实现。
+
+只读 Markdown（包括 AI 对话）现在同步代码行号、自动换行和缩进宽度设置。语法是否启用仍由 Markdown 预设与解析器决定；ATX / Setext 等源码写法解析成同级标题后使用相同主题样式，不用 CSS 模拟语法。主题预览新增 H4–H6、嵌套列表、任务列表、链接、行内代码、折叠警告框、带行号长代码及滚动按钮样例。
+
+工作区滚动按钮固定在编辑区域右下角，适用于写作和源码模式：顶部只显示到底部、底部只显示到顶部、中间同时显示；空文档或没有可滚动内容时隐藏。滚动状态通过被动监听与动画帧合并更新，尺寸、内容和折叠变化会重新计算，减少动画偏好开启时直接跳转。
+
+验证方法：
+
+1. 运行 `cd frontend` 后执行 `npm test` 和 `npm run build`，检查主题变量覆盖、六主题预览矩阵、主题升级、Markdown 预设和滚动按钮回归。
+2. 本地启动前端，访问 `tests/visual/index.html?theme=light`，依次切换表中六个主题，检查新增样例的链接焦点、复选框、折叠态、代码换行及行号。社区主题已安装旧版本时，应在主题页更新后再检查。
+3. 工作区分别打开空笔记、短笔记、长笔记，切换写作与源码模式，在顶部、中间、底部验证按钮数量和跳转方向；调整窗口尺寸、折叠标题后再次检查。
+
+本次自动检查覆盖仓库内六主题的结构和样式变量，不包含用户自行导入的任意第三方 CSS，也不等同于所有浏览器的逐页视觉验收。
+
 本次检查仓库内 3 个内置主题和 3 个社区预设，共扫描 105 个前端源文件的组件与语义样式变量。用户自行导入的第三方 CSS 不在仓库中，不据此声称已验收。
 
 ## 范围与结果

docs/development/前端构建分块优化开发说明.md

@@ -0,0 +1,43 @@
+# 前端构建分块优化开发说明
+
+> 更新日期：2026-09-06。基于 main 的 64af068 进行构建对比；以下结果为本地生产构建，不是网络耗时或性能评分。
+
+## 当前方案
+
+- Mermaid 由静态导入改成第一次渲染或校验图表时动态导入。复用加载 Promise，加载失败清除缓存以允许重试，主题初始化与渲染继续串行执行。
+- CodeMirror 基础模块、ProseMirror 和 Milkdown 分组缓存。仅显式选中的模块进入手动分组，不吸收所有传递依赖。
+- CodeMirror 语言解析器、全部 Shiki 语法和 Mermaid 图型继续按需加载。不能将所有语言打入 editor vendor，否则会反而增加编辑器的首次加载量。
+- KaTeX 按实际安装版本分组，避免合并项目版本和依赖内版本。不强制升级第三方依赖的数学解析器。
+- 启用 Vite manifest，并提供 build:report 脚本用于持续比较入口静态依赖。
+
+## 构建观察
+
+数值按十进制 kB 计算。静态闭包包括入口 JS 与递归 imports，去重后求和；不包含 CSS、字体、运行时动态导入或浏览器缓存。gzip 为每个 JS 文件压缩后求和，不代表服务器必然启用该压缩。
+
+| 检查项 | 优化前 | 优化后 |
+| --- | --- | --- |
+| 聊天页静态 JS 闭包 | 约 1563.5 kB | 约 894 kB |
+| 聊天页闭包 gzip | 约 451.6 kB | 约 292 kB |
+| VisualMarkdownEditor 单包 | 约 1145.8 kB | 约 20 kB，核心依赖转入独立块 |
+| 首屏静态 JS 闭包 | 约 409.7 kB | 约 409 kB，基本不变 |
+
+组件单包缩小不等于整个编辑器只需要 20 kB。编辑器仍需要加载基础框架、核心依赖和实际用到的语法。此次主要减少普通 Markdown 页对 Mermaid 的提前加载，并改善模块缓存边界；未测量真实启动耗时，不能声称首屏提速比例。
+
+## 验证方法
+
+在 frontend 目录执行：
+
+```powershell
+pnpm build
+pnpm build:report
+pnpm test
+pnpm exec vite preview --host 127.0.0.1 --port 4173
+```
+
+build:report 读取 dist/.vite/manifest.json，输出入口闭包大小与最大的 15 个 JS 块。对比时保存相同构建环境的两份输出；更新依赖后需重新测量。
+
+本轮前端 345 项测试通过，类型检查及生产构建通过。已在生产预览打开工作区和真实 Mermaid 示例笔记，确认编辑器与 SVG 加载，未发现控制台 error。Shiki 全语言覆盖仍由既有语言测试检查。
+
+## 保留的大块与边界
+
+C++、Emacs Lisp 等语法、Oniguruma WASM、部分 Mermaid 图型及 Mermaid 核心仍可能超过 500 kB。这些资源保留按需加载，不裁减语言支持，也不提高警告阈值来隐藏问题。首次打开复杂图表或对应语言仍有加载成本；后续可基于真实请求和设备数据评估 Worker、资源预热及库版本升级。

docs/development/后台运行日志与压力问题修复.md

@@ -0,0 +1,101 @@
+# 后台运行日志与压力问题修复
+
+## 1. 范围与入口
+
+本次针对 Agent 与任务压测发现的历史记录截断、同步数据库写入阻塞事件循环、长 Trace 树形筛选过慢进行修复，并增加统一运行日志。
+
+主导航的「日志」打开 `/logs`。知识库选择页也有入口；无需成功打开 Vault 即可查看。需要 AI Core 正常提供 HTTP 服务。后台未启动时，页面显示连接错误，不伪造历史结果。
+
+页面提供级别、模块、事件名/错误码/关联 ID 筛选及详情展开。日志列表高度受限，按时间从旧到新显示，默认每 5 秒获取新日志并跟随到底部。向上滚动时暂停跟随，抵达顶部自动加载更早日志并保持阅读位置；可一键回到最新。隐藏页面和卸载后停止轮询。界面最多保留当前浏览窗口的 500 条，继续读取旧日志时移出另一端的记录，后台保留窗口不受影响。所有组件使用已有主题变量、卡片、按钮、下拉框及 `ui-disclosure` 展开样式。
+
+## 2. 日志覆盖
+
+| 模块 | 记录内容 | 定位信息 |
+| --- | --- | --- |
+| vectors | 后台索引状态、向量调用失败、是否使用本地索引回退 | job_id、错误码、异常类型、调用位置、批次数量 |
+| models | 本地模型/远程模型运行诊断、CUDA/CPU、失败与回退 | 模型、设备、状态、错误码、耗时 |
+| agent | 创建运行、模型轮次、工具调用与结果、权限决策、完成/失败/取消 | run_id、Provider、模型、步骤、事件序号、工具名 |
+| tasks | 创建、修改、删除及不存在的删除目标 | task_id、关联 note_id、修改字段名、状态 |
+| providers / chat | 模型请求完成或未完整结束、流式模型错误、对话失败 | Provider、模型、request_id、run_id、错误码 |
+| http / api | HTTP 写操作、失败请求、超过一秒的请求及业务错误 | HTTP 方法、路由模板、状态码、耗时、request_id、资源 ID |
+| system / Python logger | 服务启动与停止，以及应用、服务器和依赖库的 warning/error | 模块、代码位置、异常类型 |
+
+`X-Request-ID` 响应头可与日志中的 request_id 对照。请求上下文通过 ContextVar 传播到后台任务和线程；Agent 内部工具触发的日志还带 run_id。查询日志自身以及正常短轮询不生成 HTTP 操作日志，避免轮询放大日志量。
+
+这里只记录操作诊断，不替代完整 Agent Trace、Token 用量台账和模型诊断表。旧代码 logger 的自由文本可能包含笔记或厂商返回，因此桥接时只记录级别、模块、代码位置和异常类型；需要业务错误码的地方使用结构化接口。
+
+## 3. 存储、容量与隐私
+
+- 位置：`APP_DATA_DIR/logs/operations.sqlite3`，与业务数据库独立，应用重启后可继续查看。
+- 保留最近 20,000 条；每批写入时淘汰更早的记录。不是按天永久归档。
+- 后台线程批量写入，队列最多 4,096 条，一批最多 128 条。队列满时丢弃新诊断记录并计数，绝不阻塞保存或模型推理。
+- 日志页面显示待写入数量、队列溢出和写入失败数量。计数属于当前进程；重启后重置。存储不可读时显示请求失败。
+- 正常退出先停止 Agent 和其他后台工作，再排空日志队列；强制终止进程可能丢失尚未写入的队列内容。
+- 不记录请求/响应正文、系统提示词、工具参数/输出、笔记标题或正文、凭据、原始异常消息、查询字符串。元数据按白名单筛选并限长，Bearer 和 `sk-` 凭据形式额外脱敏。
+- API 仅返回保留窗口内的诊断数据，不提供任意文件读取和日志删除接口。
+
+## 4. 开发接口
+
+```python
+from app.operation_logs import log_event
+
+log_event('vectors', 'embedding.failed', level='ERROR', error=exc,
+          model=model_id, job_id=job_id, error_code='EMBEDDING_UNAVAILABLE',
+          fallback='local_index')
+```
+
+第一个参数是模块名。`source` 是可选的元数据字段，例如 `local` 或 `api`，不要与模块名混淆。事件名应使用开发时定义的短常量。不要把正文、URL、异常消息或用户输入拼入事件名。
+
+`GET /api/logs` 参数：
+
+| 参数 | 规则 |
+| --- | --- |
+| limit | 默认 50，范围 1–200 |
+| before | 上页 next_cursor；正整数，返回更早的 ID |
+| level | 空或 INFO / WARNING / ERROR / CRITICAL |
+| source | 模块名精确匹配，最多 100 字符 |
+| q | 在事件名及脱敏元数据中做字面子串搜索，最多 200 字符 |
+
+返回 `items`、`next_cursor`、`sources`、`pending`、`dropped`、`write_failures`、`retention`。按递增 ID 的倒序分页，插入新日志不改变已经翻到的旧页边界。没有匹配记录时 items 为空、next_cursor 为 null。
+
+## 5. 压力问题的修复方式
+
+Agent Trace 写入由独立异步队列调度到线程，最多合并 64 个写入为一个 SQLite 事务。提交成功后才更新对外可见快照和广播 SSE。创建记录在第一次 await 前占用运行名额，避免并发创建突破 200 个活动运行上限。取消等待正在提交的快照结束，再写终态；服务关闭会等待 Agent 和 Trace 队列。数据库失败不会被当成成功提交。
+
+任务 HTTP 写操作在协程中排队，然后在线程执行；读操作也在线程执行，减少文件锁争用和主事件循环阻塞。SQLite 仍是单写者，不意味着任务写入支持无限并发。
+
+前端读取任务和 Agent 列表的后续 API 页，不再只显示第一页的 50 条。任务筛选和数量基于已获取的完整列表，界面每页显示 100 个任务；运行侧栏每页 50 条。列表刷新失败保留上次结果。列表读取使用现有 offset 协议，不是跨多页的事务快照；其他客户端同时修改数据时可以刷新重新获取。
+
+Trace 搜索先生成事件序号、模型调用 ID、工具调用 ID 的集合，再一次遍历调用树。匹配子节点保留父节点。搜索作用于完整已加载的历史，每页只渲染 200 个事件或树节点。工具统计按工具名和状态汇总，避免在底部再次生成数千个调用卡片。
+
+## 6. 验证方法
+
+后端回归覆盖日志持久化、重启、保留窗口、筛选与游标、正文排除、HTTP 关联 ID，以及后台 Trace 写入同时取消时仍释放等待方。业务回归覆盖 Agent/任务、模型路由、本地模型、用量统计和对话。
+
+```powershell
+cd backend
+.venv/Scripts/python.exe -m pytest tests/test_agent_core.py tests/test_api.py tests/test_operation_logs.py tests/test_model_routing.py tests/test_local_models.py tests/test_usage_overrides.py tests/test_chat_history.py tests/test_chat_context.py -q
+```
+
+运行测试前应将 APP_DATA_DIR、APP_DB_PATH 和 APP_VAULT_PATH 指向临时目录，避免模块导入时初始化真实扩展。pytest 的 fixture 会继续为每个测试隔离数据。
+
+前端执行 `npm --prefix frontend test` 和 `npm --prefix frontend run build`。新增用例验证后续任务/Agent 页完整加载、Trace 全历史搜索与分页、日志筛选/游标、自动跟随与上滚暂停、顶部历史加载、存储异常提示及卸载后停止刷新。
+
+2026-09-06 实测：后端全量 627 项通过；随后增加的 3 项写入失败/取消回归也通过，最后相关接口回归 21 项通过。前端全量 413 项通过，生产构建通过。构建仍提示已有部分 Markdown/Mermaid 依赖块大于 500 kB；后端测试保留已有 Starlette TestClient 弃用提示。纸间时光日志页已用隔离合成数据检查截图，运行中的本机 `/api/logs` 也已确认可返回结果。
+
+离线并发压测与真实本机 HTTP 压测复现方式、前后数据见 [Agent 与任务压测报告](Agent与任务压测报告.md)。压测只使用隔离数据和 Mock Provider，不消耗用户厂商额度。
+
+手工验收建议：
+
+1. 创建、修改和删除一个测试任务，按返回的 task_id 或 X-Request-ID 筛选日志。
+2. 运行含工具调用的 Agent，批准或取消权限请求；按 run_id 检查创建、权限、工具结果和终态。
+3. 在隔离配置中请求未安装的本地模型，查看 models/vectors 的错误码与回退信息，不应出现输入文本。
+4. 重启 AI Core，确认已提交日志仍可查看；退出 Vault 后从入口页打开日志。
+5. 切换默认浅色、深色、纸间时光主题，检查筛选栏、错误徽标和详情展开；窄窗口下应换行且详情不撑出页面。
+# 2026-09-06：大批量本地向量传输修复
+
+全量重建包含 2111 个文本块时，本地模型可能成功完成推理，但整批向量被写成一行 JSON。接收端单行限制为 16 MiB：asyncio 管道拒绝超长行，Windows 线程管道则读到不完整 JSON，最终被包装成 `LOCAL_MODEL_INVALID_RESPONSE`。这类错误不表示 CUDA 显存不足，也不应通过切换 CPU 处理。
+
+Embedding 响应改为每 128 条向量一个 JSON 帧，结束帧携带总数。接收端检查偏移连续性、请求数量和结束标记；缺块时明确失败，不把部分向量写入索引。模型仍只加载一次，推理批大小不变。语音等其他响应保持原协议。
+
+验证方法：在隔离数据目录运行 `tests/test_local_models.py`，分别使用 asyncio 与 Windows 线程管道传输 2111 × 384 的结果，确认旧格式超过 16 MiB，而分帧可完整接收。该文件 7 项测试通过。另使用本机 Bekko 权重、CUDA 对 2111 条合成文本做真实推理：返回 2111 条 384 维向量，设备 `cuda:0`，耗时约 12.55 秒；旧格式 JSON 为 17,886,180 字节。该验收不修改用户笔记、索引或运行配置；用户原始长文档的全库重建仍需在服务加载修复后重试。

docs/development/工作区后台索引与保存开发说明.md

@@ -0,0 +1,67 @@
+# 工作区后台索引与保存开发说明
+
+> 本文档用于团队开发和联调，说明 Web Workspace 的打开、保存与后台向量更新边界。
+>
+> 更新日期：2026-09-06。代码基线：`a5c44c4`，已随 PR #31 合并到 `main`。
+
+## 当前实现
+
+打开知识库和保存正文不再等待 Embedding 推理。Markdown 是正文载体；SQLite 元数据和 FTS 可先使用，向量结果随后更新。这里的后台任务是 AI Core 进程内的 asyncio 任务，不是独立队列服务，也不是 Tauri 后台服务。
+
+| 操作 | 请求完成前 | 后台阶段 |
+| --- | --- | --- |
+| 打开 Vault | 校验配置路径；路径集合变化时登记新文件、删除失效记录并返回真实文件树 | 标记需要更新时自动全量计算向量 |
+| HTTP PATCH 保存笔记 | 写正文、解析元数据、更新 FTS、清理旧向量并持久化待处理标记 | 按笔记计算向量，核对版本后写入 |
+| 手动全量重建 | HTTP 请求仍等待全量重建结果 | 推理期间不持有 Vault 写锁，提交阶段原子替换 |
+
+`note_service.update_note` 的 `defer_vectors` 默认仍为 `False`；HTTP PATCH 路由显式传入 `True`。创建、移动及其他内部调用不能据此宣称已经全部后台化。
+
+## 代码入口
+
+| 文件 | 职责 |
+| --- | --- |
+| `backend/app/services/workspace_service.py` | 文件登记、打开工作区、触发后台任务 |
+| `backend/app/services/note_service.py` | 正文保存、即时元数据与全文索引 |
+| `backend/app/services/index_service.py` | 后台任务去重、全量与单笔记向量更新、状态与关闭 |
+| `backend/app/services/coordination.py` | Vault 写入互斥 |
+| `frontend/src/features/vault/VaultEntry.vue` | 等待提示、超时错误及重试 |
+| `frontend/src/stores/editor.ts` | 保存快照、状态及连续输入补存 |
+| `frontend/src/components/common/AppShell.vue` | 每轮请求结束后间隔 5 秒刷新索引状态 |
+
+## 一致性与恢复
+
+- 文件登记和保存的待处理标记与索引写入使用同一 SQLite 事务。
+- `workspace_vectors_pending=1` 表示工作区全量向量需要更新；`note_vectors_pending:<note_id>=1` 表示该笔记有待处理工作。
+- 模型推理在写锁外执行；提交前重新核对磁盘快照或笔记记录。版本不一致时不写入旧结果，后台循环重新处理。
+- 保存接口成功后，“已保存”代表正文和全文索引已写入，不代表向量已经就绪。向量不可用期间，语义检索可能尚未覆盖刚保存的内容。
+- 模型失败保留待处理标记，正文不会因后台失败回滚。重新打开 Vault 可再次调度；不是保证持续重试的生产任务队列。
+- 关闭后端会取消进程内后台任务；持久化标记保留。任务详情、活动任务 ID 和错误信息仍主要保存在内存，重启后不会保留完整任务历史。
+- 前端保存期间继续输入时，当前请求完成后仍保持 dirty，并安排后续自动保存；落盘失败显示 save_failed。
+
+## 状态与接口
+
+`GET /api/index/status` 新增 `vector_refresh_required: boolean`，表示仍有待处理标记。它与 `status` 一起使用：失败、等待和运行中都可能需要向量更新。`pending_jobs` 不是百分比或剩余笔记数。
+
+打开 Vault 请求超时为 15 秒；诊断和状态请求为 10 秒。超时表示前端停止等待，不保证服务端操作已经取消，不应因此认定保存成功或失败。
+
+## 验证方法
+
+在 backend 目录执行：
+
+```powershell
+uv run pytest tests/test_workspace.py tests/test_workspace_background.py -q -p no:cacheprovider
+```
+
+在 frontend 目录执行：
+
+```powershell
+pnpm exec vitest run src/services/apiClient.spec.ts src/stores/editorSave.spec.ts
+```
+
+回归覆盖：模型等待期间仍可打开工作区和创建目录、重复打开去重、快照变化重算、连续保存保留最新标题和标签、模型失败不回滚正文、重新打开恢复处理、请求超时及自动补存。
+
+手动联调请使用测试 Vault：新增 Markdown 后打开；计算期间修改并保存两次；重新打开确认最后内容；在隔离配置中模拟模型不可用，核对正文保留与索引错误分别显示。
+
+## 当前限制
+
+路径登记按磁盘与数据库的路径集合判断变化，不等同于完整外部文件监听。多进程后台调度、生产任务队列、完整失败历史和原生文件监听属于后续工作。不要把当前进程内互斥用于推断多实例安全性。

docs/development/扩展安装持久化与社区包开发说明.md

@@ -0,0 +1,45 @@
+# 扩展安装持久化与社区包开发说明
+
+> 本文档用于 Skill、Plugin 安装及社区示例包开发。
+>
+> 更新日期：2026-09-06。代码基线：`a5c44c4`；社区服务仍处于第三阶段规划。
+
+## 当前实现
+
+`backend/app/extensions/archive.py` 解析上传 ZIP，`installed.py` 为运行时增加本地安装日志。`extension-installations.sqlite3` 位于 data_dir 下，记录包路径、内容摘要、启用状态、插件授权及受管理目录；成功解压的包保存在 `extension-packages`，供后续命令读取。
+
+| 环节 | 行为 |
+| --- | --- |
+| 安装 ZIP | 最大 10 MiB，解压总量最大 50 MiB，最多 2048 条目 |
+| 路径检查 | 拒绝目录穿越、链接、特殊文件、加密条目、重复及大小写冲突路径 |
+| 包布局 | 根目录或唯一顶层目录包含 skill.yaml / plugin.yaml |
+| 重启恢复 | 校验目录和内容摘要后恢复安装状态；插件恢复授权 |
+| 包内容变化 | 不自动启用变化后的包，需重新安装并检查权限 |
+| 卸载 | 受管理 ZIP 目录可清理；用户目录安装源不删除 |
+
+安装持久化不等于操作系统级沙箱、签名验证或远程社区服务上线。生产隔离、社区发布治理与签名机制仍按第三阶段规划推进。
+
+## 社区示例
+
+源码与打包入口位于 `backend/extensions/community/`。`note-reviewer` 为笔记审阅 Skill，`markdown-workbench` 为可执行 Plugin。功能、安装和测试输入见该目录 README 与各包 README。
+
+重新打包：
+
+```powershell
+cd backend
+uv run python extensions/community/build_packages.py
+```
+
+仅在需要更新社区示例产物时执行，并核对 dist 中 ZIP 和 index.json 是否与源码一致。
+
+## 验证方法
+
+在 backend 目录执行：
+
+```powershell
+uv run pytest tests/test_extension_archive.py tests/test_installed_extensions.py tests/test_community_packages.py -q -p no:cacheprovider
+```
+
+手动使用测试数据目录安装示例包，启用并调用；重启后端后确认状态恢复。对包副本修改内容再重启，应出现恢复失败提示。卸载目录安装包时，原目录应继续存在。
+
+生产社区规划见 [第三阶段实施规划](../architecture/第三阶段实施规划.md)，命令和设置接口见 [Plugin Command 与 Settings 开发说明](Plugin-Command与Settings开发说明.md)。

docs/development/标题折叠与样式开发说明.md

@@ -0,0 +1,52 @@
+# 标题折叠与样式开发说明
+
+日期：2026-09-06。范围为工作区写作模式的章节折叠，以及正文标题外观偏好。
+
+## 1. 章节边界与交互
+
+H1–H6 标题旁在悬停时显示统一折叠箭头；键盘聚焦也显示，触摸设备保持可见。章节从标题之后开始，结束于同一容器内下一个同级或更高级标题；末尾没有后续内容的标题不显示按钮。引用等容器中的标题只影响所在容器，不折叠外部正文。
+
+- 工具栏使用单个按钮：有可见章节展开时显示“全部折叠”，否则显示“全部展开”。父章节隐藏的子章节不影响按钮判断，其自身折叠状态仍保留。无可折叠章节时按钮禁用。
+- 折叠父章节不会清空子章节的折叠状态。
+- 折叠时若选区在将隐藏的正文中，光标先移到标题。
+- 从大纲、查找或键盘跳到隐藏内容时，展开包含目标的章节，避免隐藏光标。
+- 折叠只影响当前编辑器视图，不修改 Markdown，不触发文档脏状态，也不占用撤销历史。重开文件恢复展开；源码模式与静态预览不进行章节折叠。
+
+实现位于 `headingFolding.ts`：插件状态保存标题位置，通过事务映射跟随文档编辑；删除或改成正文的标题会从状态中清理。Decoration 隐藏完整块，widget 提供可聚焦的折叠按钮。章节范围按标题栈计算，并按不可变文档缓存；隐藏范围合并后遍历节点，避免每个节点重复扫描全部标题。
+
+## 2. 标题样式设置
+
+入口为“设置 → 编辑器 → 标题样式”，主题页“编辑器外观”中也提供同一组件。
+
+- 默认跟随当前主题，不覆盖主题字号、字体与粗细。
+- 启用自定义后，分别调整 H1–H6 字号（12–72 px）和字重（400–800 的五个档位）。
+- 标题字体可跟随正文，或使用系统衬线、无衬线、等宽字体。
+- 面板即时预览，工作区正文和静态 Markdown 预览使用同一偏好。
+- 不影响笔记属性栏的标题、侧栏大纲字号或页面标题，不改写源文件中的标题级别。
+- “恢复跟随主题”清除自定义覆盖；主题页“恢复默认”也重置标题设置。
+
+偏好由 `headingAppearance` store 保存到本机 `editor-heading-appearance`。读取时校验字体枚举、字重与字号范围；应用 CSS 前再次规范化，避免空输入、无效存储或异常大数影响布局。刷新后恢复设置，切换主题保留自定义偏好。用户显式启用的覆盖只作用于 Markdown 标题，优先于主题规则；颜色继续跟随主题。
+
+## 3. 桌面命令预留
+
+既有 `editorCommandService` v1 增加三个可执行 ID：
+
+| 命令 | 行为 |
+| --- | --- |
+| editor.heading.toggle-fold | 切换选区所在章节的折叠状态 |
+| editor.heading.fold-all | 折叠所有有内容的章节 |
+| editor.heading.unfold-all | 展开所有章节 |
+
+均不需要参数，沿用活动文档、模式与冲突检查。原生快捷键仍由第三阶段容器绑定，此处不注册系统级快捷键。
+
+## 4. 验证
+
+```sh
+cd frontend
+npm run test -- src/features/editor/headingFolding.spec.ts src/features/editor/VisualMarkdownEditor.spec.ts src/features/editor/HeadingStyleSettings.spec.ts src/stores/headingAppearance.spec.ts
+npm run build
+```
+
+自动检查覆盖章节边界、嵌套容器、隐藏选区迁移、父子折叠状态、大纲目标展开、序列化保持、设置保存恢复、输入校验和面板恢复默认。
+
+手动检查：打开“功能演示 / 01 Markdown 与大纲”，依次折叠 H2 与 H1，再从大纲跳转；确认隐藏内容重新显示。打开设置调整 H1 字号与 H2 粗细，返回笔记检查外观，刷新后检查偏好仍在；关闭自定义后依次切换六个主题核对主题原有样式。

docs/development/模型隔离向量索引与增量登记.md

@@ -0,0 +1,30 @@
+# 模型隔离向量索引与增量登记
+
+## 目标与实现
+
+向量仍保存在本地 `app.db`，重启复用。`routed_block_vectors` 主键升级为 `(space_id, dimensions, block_id)`，同维度不同模型、同模型不同维度均独立存储。每个空间建立以模型标识和维度的 SHA-256 命名的 `vec0` 虚拟表，动态表名不包含厂商输入。
+
+首次访问旧空间时，在事务中将已有 JSON 向量转换为归一化 float32 索引，不重新调用 Embedding 模型。随后检索由 sqlite-vec 执行精确 KNN，避免每次在 Python 中解码所有向量、计算点积。该实现是精确搜索，不是 ANN；依据归一化向量的欧氏距离换算余弦分数。参见 [sqlite-vec KNN 文档](https://alexgarcia.xyz/sqlite-vec/features/knn.html)。
+
+覆盖检查和 KNN 使用同一事务。向量更新、删除及笔记级联删除通过触发器清理派生索引，新向量与原始向量在同一保存点写入。索引缺失或不完整仍明确失败/按已有策略回退，不混入其他模型结果。本地专用笔记按 `local_only` 元数据过滤，不同空间的结果继续使用 RRF 融合。
+
+数据库搜索及旧空间转换在线程中运行，不阻塞异步服务事件循环。首次转换仍会占用 SQLite 写事务；超大库应进一步评估迁移耗时。新增空间保留原空间索引，暂不自动清理历史空间。
+
+首次转换使用进程内迁移锁串行执行，在打开检索读快照之前以 `BEGIN IMMEDIATE` 获取写事务；等待迁移时不持有读事务，避免多个搜索从读锁升级写锁发生冲突。迁移完成后二次检查即可复用。普通检索和隐私分区检索共用该流程，已有索引的检索仅执行读取。
+
+首次转换同时通过 Vault 的异步写入锁与笔记保存、后台索引协调，避免保存事务读取旧 Block 后与迁移争抢写锁。等待是异步的；取消检索时，仍等待迁移线程结束后才释放锁。已就绪的空间直接走只读检查，不进入写入队列。写入锁按事件循环生命周期创建，避免重启后复用已关闭循环的锁。
+
+## 外部新增文件
+
+文件树检测到新增 Markdown 后先登记元数据与全文索引，然后为每条新笔记持久化 `note_vectors_pending:<note_id>`，逐笔记在后台计算。不再因新增文件设置全库重建标记；已存在的全库待处理标记仍保留，以免跳过之前未完成的任务。
+
+新增文件在推理期间再次变化时校验快照并重试，只同步该笔记。写入失败保留待处理标记。手动“重建全部”仍执行全库重建，正常重新打开已完成的工作区不再入队。
+
+## 验证
+
+- 隔离数据库运行后端全套测试：637 项通过；最终覆盖检查优化另运行检索及后台工作区回归，96 项通过。
+- 新增用例验证同模型不同维度并存、重新连接复用且查询不解码向量 JSON、旧表迁移只计算查询向量，以及外部新增文件不触发全量重建。
+- 并发迁移回归用同步事件暂停第一个请求的转换，同时发起第二个请求；验证普通/隐私分区路径均只迁移一次、两个请求结果一致，并开启 SQLite `query_only` 验证后续检索不会写入。相关检索与后台工作区测试 91 项通过。
+- 并发保存回归暂停迁移后发起实际 `update_note(..., defer_vectors=True)`，验证保存等待、事件循环仍可运行、放行迁移后正文成功落盘并保留新内容的向量待处理标记；另覆盖搜索被取消时不得提前放行保存。
+- `backend/scripts/vector-index-benchmark.py` 使用临时数据库、固定随机种子，比较 4000 条 384 维向量的 top-20，旧新路径结果顺序一致。5 次采样中位数：Python 扫描约 1289.64 ms，sqlite-vec 约 19.67 ms；首次转换约 1329.51 ms。该结果只测向量检索，不包含查询 Embedding、重排与 HTTP 耗时，不代表端到端加速比例。
+- 原始结果：[2026-09-06-sqlite-vec-search.json](performance/2026-09-06-sqlite-vec-search.json)。基准可用后端虚拟环境 Python 直接执行上述脚本，不读写用户 Vault。

docs/development/警告框与桌面编辑命令开发说明.md

@@ -0,0 +1,90 @@
+# 警告框与桌面编辑命令开发说明
+
+日期：2026-09-06。范围为前端渲染与命令边界；不包含 Tauri IPC、原生菜单或系统级快捷键注册。
+
+## 1. 格式与渲染
+
+使用引用块语法。GitHub 的 NOTE、TIP、IMPORTANT、WARNING、CAUTION 均可渲染；同时支持 Obsidian 的常用类型、别名、标题、嵌套与折叠。
+
+```markdown
+> [!WARNING]- 自定义标题
+> 提示正文，支持 **粗体**、`行内代码`、列表等 Markdown。
+>
+> > [!TIP]+ 嵌套提示
+> > 展开内容
+```
+
+无 `+` / `-` 时不可折叠；`+` 默认展开，`-` 默认折叠。点击折叠只改变本次显示状态，不自动改写源文件中的默认状态。标题作为文本显示，不执行 HTML。未知类型使用 note 外观并保留类型名。
+
+| 规范类型 | 兼容别名 |
+| --- | --- |
+| note | — |
+| abstract | summary、tldr |
+| info、todo | — |
+| tip | hint |
+| important | — |
+| success | check、done |
+| question | help、faq |
+| warning | caution、attention |
+| failure | fail、missing |
+| danger | error |
+| bug、example | — |
+| quote | cite |
+
+工作区顶部“提示框”选择器可插入模板。编辑器保留原生 blockquote 文档节点，以 NodeView 展示标题与折叠按钮，装饰隐藏标记；选区进入标记时显示原文以便修改。序列化仅取消引用首行提示标记的转义，避免保存后退回普通引用。代码中的标记不转换。写作模式会规范化 Markdown 转义；需要永久展示字面标记时使用行内代码或围栏代码。
+
+静态预览使用 marked 的 blockquote renderer，折叠使用原生 details / summary，内容仍经过 DOMPurify。两个入口共享 `callouts.ts` 与 `callouts.css`；颜色继承主题的 info、warning、success、error、surface 和 text 变量，不另存固定浅色配色。因此已有主题和符合主题规范的导入主题均可继承。
+
+## 2. 桌面命令边界 v1
+
+入口：`frontend/src/services/editorCommandService.ts`。
+
+- `editorCommandVersion`：当前版本 1。
+- `getEditorCommandCapabilities()`：返回每个稳定命令 ID 的 supported 与 enabled。预留 ID 不等于已经实现。
+- `executeEditorCommand(id, params?)`：返回 `{ ok: true }` 或 `{ ok: false, reason }`。reason 为 unsupported、unavailable、invalid-params、failed。
+- `registerEditorCommands(target)`：由活动编辑器注册处理器，返回注销函数。旧组件注销不清除替代组件的注册。
+
+成功表示处理器接受并执行了命令；具体格式操作仍遵循编辑器的选区规则。命令不直接写磁盘，变更进入既有脏状态、撤销与自动保存链路。无活动文件、源码模式、只读、冲突、编辑器加载中或文件已切换时禁用当前处理器。
+
+| 已接入 ID（统一加 editor. 前缀） | params |
+| --- | --- |
+| bold、italic、ordered-list、bullet-list、inline-code、code-block、inline-math、math-block、paragraph | 无 |
+| heading | 整数 1–6 |
+| font-size | 有限数值 8–96，单位 px；作用于选区 |
+| insert-markdown | 非空 Markdown 字符串，最多 100000 字符 |
+| callout | `{ type, title?, body?, fold? }`；fold 为空串、+ 或 -；标题不可换行 |
+
+目录还预留删除线、任务列表、引用、Mermaid、链接、图片、表格、分隔线、硬换行、引用式链接、HTML、撤销/重做，以及 `editor.import-note-properties`、`editor.metadata.edit`、`editor.metadata.title`、`editor.metadata.tags`。这些单独的处理器尚未接入，返回 unsupported；现阶段复杂格式可通过 insert-markdown 插入。元数据不得通过普通正文插入接口冒充属性导入。
+
+第三阶段由 Host 将原生菜单/快捷键映射到上述 ID。快捷键表需支持平台差异与用户改键，过滤表单、输入法组合与弹窗焦点；不要重复绑定浏览器和 Milkdown 已有按键。宿主只能调用允许的命令，不执行任意脚本。元数据处理器须按已有桌面需求完成无损 YAML 合并、版本检查、冲突提示及属性/正文一并撤销后才可标记 supported。
+
+## 3. 验证方法
+
+在 frontend 运行：
+
+```sh
+npm run test -- src/utils/callouts.spec.ts src/services/editorCommandService.spec.ts src/features/editor/VisualMarkdownEditor.spec.ts
+npm run build
+```
+
+- callouts：逐个类型与别名、大小写、嵌套、默认折叠、空正文、未知类型、标题注入、普通引用和代码排除。
+- 编辑器：初始解析、直接输入标记、按钮折叠、序列化往返、命令参数校验和冲突禁用。
+- 命令服务：能力查询、无活动目标、未知命令、未实现命令和旧目标注销隔离。
+- 启动开发服务器，访问 `/tests/visual/callouts.html?theme=paper-moments`；依次替换 light、dark、sepia、ocean-blue、midnight-purple。左右分别是工作区和静态预览，核对边框、标题、正文、嵌套与折叠；缩窄窗口检查换行。
+
+此项不宣称支持所有 Markdown 方言；脚注、定义列表、Wiki 双链及 `:::` 等其他警告框语法仍需独立扩展。原生快捷键和元数据转换属于第三阶段验收。
+
+## 4. 六主题适配补充
+
+主题新增 `--color-callout-info/success/warning/danger/important/quote` 六个语义变量。每种类型继续使用共享组件结构，标题、边框与淡色背景取同一语义配色。未知导入主题未定义这些变量时，默认继承其已有状态色。折叠标题补齐悬停、键盘焦点与不可折叠标题状态。
+
+| 主题 | 本次版本 | 外观 |
+| --- | --- | --- |
+| light、dark、sepia | 1.2.0 | 分别使用浅色、深色、暖色配色 |
+| paper-moments | 1.7.0 | 纸张边框、虚线内描边和轻投影；嵌套取消重复投影 |
+| ocean-blue | 1.4.0 | 海蓝与低亮度状态色 |
+| midnight-purple | 2.2.0 | 深色表面与高亮度状态色 |
+
+修正工作区基础选择器覆盖类型颜色的问题，默认色使用低优先级规则。社区预览 iframe 同步载入共享 callouts CSS，并展示 14 种规范类型、默认展开/折叠及嵌套样例。主题安装与预览使用同一 CSS 来源，纸间时光下载包的清单和样式同步更新；已安装旧版可通过主题页既有更新入口升级。
+
+验证增加六主题 × 六配色在实际 8% 混色背景上的标题对比度检查（至少 4.5:1），工作区选择器覆盖回归，以及六主题预览结构检查。此检查针对不透明 sRGB 配色，不代替每个平台的字体与截图验收。

docs/development/长文渲染优化与压测报告.md

@@ -0,0 +1,110 @@
+# 长文渲染优化与压测报告
+
+日期：2026-09-06。基线为 `750e172`，结果为本次未提交的渲染优化；基线和优化版使用相同样本、浏览器参数及操作序列。
+
+## 1. 测试环境与范围
+
+Windows、Intel Core i7-13620H、Headless Chrome 152，视口 1424 × 905，Vite 开发服务。每种规模重开测试页面三次，独立测试浏览器，不读写真实笔记。耗时基于 performance.now；打开指标不包含模块网络加载。样本含标题、表格、代码块、提示框和行内格式。
+
+实际汉字数为 25632、61172、122322；Markdown 总字符数以原始 JSON 为准。不是仅以文件字节数代替“字数”。共完成优化前后 18 轮浏览器运行，所有运行的插入内容与文末完整性检查通过。
+
+## 2. 本次优化
+
+- 标题装饰按不可变文档和折叠状态弱缓存；光标移动不改变折叠状态时复用结果。没有折叠范围时不遍历全文生成隐藏装饰。
+- 文档变更后用位置 Set 验证标题映射，避免对每个已折叠标题反复扫描所有标题。
+- 字号装饰按不可变文档弱缓存；提示框标记位置按文档缓存，光标移动只判断标记是否处于编辑范围。
+- 静态代码高亮增加 LRU，最多 64 项、累计 100 万个字符串字符；超过预算四分之一的单块不缓存。缓存同时包含深浅主题颜色，最终输出继续净化。缓存只在进程内，不写入存储。
+
+弱缓存随文档释放，不用全局 Map 持有历史文档；高亮缓存有明确上限。
+
+## 3. 对比结果
+
+单位 ms。打开取三轮中位数；选区、插入、折叠取各轮 P95 的中位数；热预览取六次热运行中位数。P95 样本量较少，仅用于本机前后比较。
+
+| 实际汉字数 | 打开 前→后 | 光标移动 P95 前→后 | 插入 P95 前→后 | 折叠/展开 P95 前→后 | 热预览 前→后 |
+| --- | --- | --- | --- | --- | --- |
+| 25632 | 272.1 → 218.6 | 1.9 → 0.6 | 7.0 → 6.9 | 55.0 → 45.6 | 40.0 → 26.6 |
+| 61172 | 519.7 → 447.5 | 5.7 → 0.6 | 9.7 → 9.6 | 149.1 → 145.5 | 82.9 → 55.6 |
+| 122322 | 875.4 → 869.1 | 11.9 → 1.2 | 22.2 → 27.2 | 256.6 → 263.9 | 140.2 → 95.5 |
+
+主要收益是减少光标移动的重复工作，以及重复代码块/重复预览的高亮开销。2.5 万汉字样本完成全部操作，但不以此宣称所有文档都能维持 60 FPS。
+
+12 万汉字的整篇折叠仍超过 250 ms，插入 P95 本轮反而增加，不能声称打字性能全面提升；全量 DOM 更新、编辑器自身处理与浏览器调度仍需进一步分项剖析。打开仍有长任务，缓存没有解决虚拟化问题。
+
+## 4. 原始数据与复现
+
+- [优化前 JSON](performance/2026-09-06-long-document-baseline.json)
+- [优化后 JSON](performance/2026-09-06-long-document-after.json)
+- [压测脚本与指标说明](../../frontend/tests/performance/README.md)
+
+```powershell
+npm --prefix frontend run test
+npm --prefix frontend run build
+npm --prefix frontend run dev -- --port 5175 --strictPort
+# 另一个终端：
+backend/.venv/Scripts/python.exe frontend/tests/performance/run-stress.py --url http://127.0.0.1:5175/tests/performance/stress.html --runs 3 --output .local-plans/stress-results.json
+```
+
+新增回归检查确认光标移动复用标题装饰、正文编辑使缓存失效、折叠与展开不残留隐藏内容。前端 402 项测试通过。
+
+## 5. 边界与后续
+
+本次测量是浏览器中的程序化编辑事务，不是输入法、实际键盘到屏幕显示、滚动帧率或生产包启动测试。样本代码块存在重复，LRU 收益不能直接外推到全部唯一代码块的文档。堆内存只采样，不作为内存泄漏结论。
+
+后续应针对 12 万字的输入和整篇折叠采集独立 CPU trace，评估装饰的增量映射及可见区域渲染；在输入法、表格与代码块编辑验收之前，不直接给 contenteditable 应用跳过布局或整篇虚拟化。
+
+## 6. 手动压测反馈后的滚动与定位修复
+
+用户实测：2.56 万字正常，6 万字快速滚动轻微停顿，12 万字明显卡顿；从长文末尾全部折叠没有回到顶层。
+
+本轮将“全部折叠”设为一次性把光标移到首个标题并将编辑区滚动到顶部，单个标题折叠保留原有定位行为。回归用例包含 100 个同级顶层标题，从文末触发后检查光标、scrollTop 与正文不变，避免只有一个 H1 的样本掩盖问题。
+
+语言标签改为只同步变动的代码块，语言菜单只在打开时响应滚动定位，并合并同一帧的重复事件；监听祖先滚动，卸载时清理监听及待执行帧。
+
+新增独立 CDP 滚轮测试，在相同的有限高度 flex 容器、纸间时光主题下，每档运行两次。下表为每次帧间隔 P95 的中位数，单位 ms，越小越好。这不是原先编辑事务基准的延续，也不是生产环境 FPS。
+
+| 请求汉字数 | 修改前 | 修改后 |
+| --- | ---: | ---: |
+| 25000 | 30.05 | 20.10 |
+| 60000 | 55.00 | 45.05 |
+| 120000 | 90.10 | 100.00 |
+
+两档较短样本有改善，12 万字没有改善，仍未达到流畅滚动的目标。CPU 采样显示滚入新代码块时的 CodeMirror 初始化、选区测量及 DOM 观察回调占用明显；不能仅凭此认定唯一原因。代码块布局隔离实验未带来收益，已撤回，未引入可能影响编辑、选区或布局的虚拟化。
+
+- [滚轮基线数据](performance/2026-09-06-scroll-baseline.json)
+- [滚轮修改后数据](performance/2026-09-06-scroll-after.json)
+
+下一步需要评估代码块按交互初始化或编辑器级虚拟化，并同时验证输入、选区、搜索定位和折叠；当前不将 12 万字滚动问题标记为完成。
+
+本轮前端 405 项测试通过，涵盖折叠定位、语言标签增量同步、菜单祖先滚动定位和卸载清理。
+
+## 7. CodeMirror 高亮复用实验
+
+在上轮提交 `874e916` 的基础上继续尝试：同一语言及主题的 CodeMirror LanguageSupport 内缓存高亮装饰，代码块离屏销毁后重新创建时，相同正文不再重复分词及构建装饰。缓存最多 32 项、64000 个源字符，超过 16000 字符的单块不缓存，使用 LRU 淘汰；语言支持释放时缓存一并释放。编辑后的内容按新正文计算，不复用旧位置。
+
+回归测试通过统计分词调用验证跨视图复用、正文编辑重新计算和超限淘汰。原有深浅主题切换与编辑测试继续验证显示内容。
+
+12 万字继续测量两次，帧间隔 P95 分别约 100.2 ms、90 ms，二者中位数约 95.1 ms；上一轮约 100 ms。样本重复代码较多，结果仍在明显波动范围内，不能宣称解决滚动卡顿。此优化减少确定可重复的高亮工作，但下一步仍须处理创建 CodeMirror 和布局测量的成本。
+
+- [本轮滚轮原始数据](performance/2026-09-06-scroll-token-cache.json)
+
+## 8. 主题对照与纸间时光 1.8.1 修复
+
+用户补充：同一份 12 万字文档在默认浅色、深色下不卡顿。因此重新进行主题对照，之前将 CodeMirror 作为主要优化方向的判断不足；CPU 采样中的布局及选区测量耗时不能单独证明编辑器是主要原因。
+
+保持相同文档和滚轮脚本，默认浅色、深色各测一次，P95 均约 30 ms。纸间时光 1.8.0 仅禁用整篇 `.ProseMirror` 的虚线 outline 后，两次 P95 约 30.1、30 ms；相比此前约 90–100 ms，构成明确的样式消融证据。主题与 CodeMirror 的交互仍可能影响布局，但不需要先用编辑器虚拟化解决这个差异。
+
+修复将贯穿长文的虚线轮廓改为四条小尺寸渐变平铺背景，保留纸张、缝线、胶带、段落横线和叠纸阴影。独立伪元素虚线 border 的实验反而更慢，已撤回。正式主题版本升为 1.8.1。
+
+| 主题或实验 | 次数 | 帧间隔 P95（ms） |
+| --- | ---: | --- |
+| 默认浅色 | 1 | 30 |
+| 默认深色 | 1 | 30 |
+| 1.8.0 仅禁用整篇 outline | 2 | 30.1、30 |
+| 1.8.1 平铺缝线 | 3 | 30.1、30、30.1 |
+
+1.8.1 三次测试的帧间隔中位数均为 10 ms，全部折叠后的 scrollTop 均为 0，光标位置均为 1。已检查视口截图，手账装饰保留。这里的结果说明本轮样本与环境下，纸间时光恢复到接近默认主题的滚动表现，不代表所有设备、所有复杂文档均无长任务。
+
+已安装主题保存在本地，不会自动被新版资源覆盖。刷新前端后，到“主题 → 社区主题 → 纸间时光”点击“更新”，确认版本 1.8.1 再进行手动复测。
+
+- [主题对比原始数据](performance/2026-09-06-scroll-theme-comparison.json)

frontend/README.md

@@ -41,6 +41,10 @@ pnpm dev
 
 编辑器使用 Milkdown/Crepe 与 CodeMirror 6；Markdown 展示使用 marked、DOMPurify 和 Shiki。Provider logo 位于 `src/assets/providers`，授权与来源说明随目录保存。
 
+写作模式支持按标题折叠章节及全部展开/折叠；“设置 → 编辑器 → 标题样式”可按 H1–H6 设置字号、粗细与标题字体。设置本地保存，不改写 Markdown；详见 [标题折叠与样式开发说明](../docs/development/标题折叠与样式开发说明.md)。
+
+工作区和静态预览支持 GitHub alerts / Obsidian callout 的类型、别名、标题、嵌套与折叠。桌面快捷键使用预留的 v1 编辑命令边界，尚未接入 Tauri 原生快捷键与元数据转换处理器；见 [警告框与桌面编辑命令开发说明](../docs/development/警告框与桌面编辑命令开发说明.md)。
+
 语言设置会即时更新主导航、页面标题和各功能页面，并同步更新文档与编辑器的 `lang`。拼写检查使用浏览器或桌面 WebView 提供的本地词典，开关会即时作用于可视化 Markdown、源码编辑器以及普通文本输入；JSON、密码等结构化或敏感输入保持关闭。
 
 ## 数据边界
@@ -78,3 +82,17 @@ pnpm build
 - 异步页面需要处理加载、空数据、后端错误、重复提交和迟到响应。
 - 功能行为或契约变化时，同一提交同步更新测试和相关文档。
 - 页面需求见[前端页面需求说明](../docs/contracts/前端页面需求说明-开发版.md)，后端行为以运行时 `/openapi.json` 为准。
+
+## 保存状态与图表联调（2026-09-06）
+
+“已保存”表示正文与全文索引请求成功；向量可能仍在后台计算。状态栏定期刷新索引状态；保存期间继续输入会补存。Vault 入口具有超时、错误与重试提示。
+
+Mermaid 大图打开时适配窗口，支持平滑滚轮缩放和鼠标位置补偿；行内中键启用滚轮控制，移动鼠标退出。标签段落样式与正文隔离，避免 foreignObject 内文字裁切。
+
+开发和验证方法见 [后台索引与保存](../docs/development/工作区后台索引与保存开发说明.md)、[Mermaid 预览与缩放](../docs/development/Mermaid预览与缩放开发说明.md)。
+
+## 构建体积检查
+
+执行 `pnpm build` 后运行 `pnpm build:report`，查看入口静态 JS 依赖与大块清单。分组策略、统计口径及保留的大资源见 [前端构建分块优化开发说明](../docs/development/前端构建分块优化开发说明.md)。
+
+Markdown 语法预设、主题适配和外部文件刷新规则见 [开发说明](../docs/development/Markdown语法预设与外部文件刷新.md)。

frontend/package.json

@@ -8,7 +8,8 @@
     "build": "vue-tsc -b && vite build",
     "test": "vitest run",
     "preview": "vite preview",
-    "type-check": "vue-tsc --noEmit"
+    "type-check": "vue-tsc --noEmit",
+    "build:report": "node scripts/build-size.mjs"
   },
   "dependencies": {
     "@codemirror/commands": "6.11.0",

frontend/scripts/build-size.mjs

@@ -0,0 +1,19 @@
+import { readFileSync } from 'node:fs'
+import { resolve } from 'node:path'
+import { fileURLToPath } from 'node:url'
+import { gzipSync } from 'node:zlib'
+const root = fileURLToPath(new URL('../dist/', import.meta.url))
+const manifest = JSON.parse(readFileSync(resolve(root, '.vite/manifest.json'), 'utf8'))
+const files = new Map(Object.values(manifest).filter(x => x.file.endsWith('.js')).map(x => [x.file, x]))
+const sizes = file => { const bytes = readFileSync(resolve(root, file)); return { bytes: bytes.length, gzip: gzipSync(bytes).length } }
+const closure = key => {
+  const seen = new Set()
+  function visit(k) { if (seen.has(k)) return; seen.add(k); for (const i of manifest[k]?.imports ?? []) visit(i) }
+  visit(key)
+  return [...new Set([...seen].map(k => manifest[k]?.file).filter(f => f?.endsWith('.js')))]
+}
+const entries = Object.entries(manifest).filter(([key, value]) => value.isEntry || /(?:WorkspaceView|VisualMarkdownEditor|VaultEntry|ChatView)\.vue$/.test(key)).map(([key]) => {
+  const files = closure(key)
+  return { entry: key, files, bytes: files.reduce((n, f) => n + sizes(f).bytes, 0), gzip: files.reduce((n, f) => n + sizes(f).gzip, 0) }
+})
+console.log(JSON.stringify({ entries, largest: [...files.keys()].map(file => ({ file, ...sizes(file) })).sort((a,b) => b.bytes-a.bytes).slice(0,15), chunks: files.size }, null, 2))

frontend/src/assets/themes/paper-moments.theme

@@ -1,6 +1,6 @@
 theme_id: paper-moments
 name: 纸间时光 · Paper Moments
-version: 1.6.2
+version: 1.9.0
 author: NotesAgent
 description: 奶油纸张、手帐虚线与粉蓝胶带，把每天的灵感好好收藏。
 min_app_version: 0.2.0
@@ -9,6 +9,15 @@ css_entry: theme.css
 license: MIT
 ---
 [data-theme="paper-moments"] {
+  --color-markdown-selection: #ecd3c7;
+  --color-editor-scroll-background: #fff9e9;
+  --color-editor-scroll-text: #875343;
+  --color-callout-info: #406b7b;
+  --color-callout-success: #536f43;
+  --color-callout-warning: #875f25;
+  --color-callout-danger: #a34e42;
+  --color-callout-important: #805c7e;
+  --color-callout-quote: #6e6053;
   color-scheme: light;
   --color-background-primary: #faf7ee;
   --color-background-secondary: #f3eee3;
@@ -149,9 +158,13 @@ license: MIT
   padding: 44px 40px 60px 52px;
   border: 1px solid #685949;
   border-radius: 8px 16px 8px 8px;
-  outline: 1px dashed #c5b9a7;
-  outline-offset: -10px;
-  background: linear-gradient(90deg, transparent 32px, #e9cfc7 32px 34px, transparent 34px), #fffef8;
+  /* Small repeated tiles retain the stitching without a document-height dashed outline. */
+  background:
+    linear-gradient(#c5b9a7 50%, transparent 50%) 10px 0 / 1px 8px repeat-y,
+    linear-gradient(#c5b9a7 50%, transparent 50%) calc(100% - 10px) 0 / 1px 8px repeat-y,
+    linear-gradient(90deg, #c5b9a7 50%, transparent 50%) 0 10px / 8px 1px repeat-x,
+    linear-gradient(90deg, #c5b9a7 50%, transparent 50%) 0 calc(100% - 10px) / 8px 1px repeat-x,
+    linear-gradient(90deg, transparent 32px, #e9cfc7 32px 34px, transparent 34px), #fffef8;
   box-shadow: 6px 6px 0 #d8e6e2, 12px 12px 0 #f0d8cf;
 }
 [data-theme="paper-moments"] .milkdown-host .ProseMirror::before {
@@ -322,3 +335,15 @@ license: MIT
 /* Nested choices retain a quiet paper border without repeating tape/shadows. */
 [data-theme="paper-moments"] .surface-nested { border: 1px dashed #c5b9a7; background: #fffdf5; border-radius: 6px; }
 [data-theme="paper-moments"] .surface-nested.selected { border-color: var(--color-accent-primary); background: var(--color-accent-soft); }
+
+/* Callout paper: no tape over titles, no repeated shadows in nested blocks. */
+[data-theme="paper-moments"] .markdown-callout,
+[data-theme="paper-moments"] .milkdown .ProseMirror blockquote.markdown-callout {
+  border-radius: 10px 3px 10px 3px;
+  outline: 1px dashed color-mix(in srgb, var(--callout-color) 30%, transparent);
+  outline-offset: -6px;
+  box-shadow: 3px 3px 0 color-mix(in srgb, var(--callout-color) 12%, transparent);
+  padding: 14px 18px;
+}
+[data-theme="paper-moments"] .markdown-callout .markdown-callout { box-shadow: none; }
+[data-theme="paper-moments"] .markdown-callout > .callout-title { font-family: Georgia, 'Noto Serif SC', 'Songti SC', SimSun, serif; }