fix: stabilize background operations and large embedding results

2026-09-06 16:26:17 +08:00
parent 874e916106
commit 3b9490e3fb
73 changed files with 3847 additions and 149 deletions
@@ -97,3 +97,5 @@
 - [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)
@@ -204,6 +204,17 @@ RunCancelled
 - `POST /api/workspace/open` 返回可使用的 WorkspaceSnapshot，不等待向量推理。
 - `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)。
@@ -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)
@@ -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": 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,
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+{
+  "transport": "real loopback HTTP, separate Uvicorn process",
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+  "concurrency": 20,
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+  },
+  "health_errors": [],
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+}
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+{
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+  },
+  "health_errors": [],
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+}
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+[
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+    "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"
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+        "overflow": "hidden",
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+]
@@ -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。
@@ -77,3 +77,34 @@ backend/.venv/Scripts/python.exe frontend/tests/performance/run-stress.py --url
 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)