diff --git a/README.md b/README.md
index 641878a..fbb686f 100644
--- a/README.md
+++ b/README.md
@@ -173,3 +173,17 @@ css_entry: styles/theme.css
 发布主题仓库时可提供原始 `.theme` 文件链接或 ZIP 发布附件直链，不要使用仓库 HTML 浏览页面地址。下载请求不携带 Cookie 或 HTTP 登录信息，服务器需允许应用来源的 CORS 请求；暂不支持私有仓库认证。
 
 下载和本地文件限制为 5 MB；ZIP 解压总大小限制为 10 MB，最多 100 个条目。URL 下载超时为 30 秒。取消导入会取消下载，过期请求不会替换当前待安装主题。更新时递增清单版本号，并保持 `theme_id` 稳定。
+
+
+### 主题兼容性与安装前预览
+
+当前应用版本从 `frontend/package.json` 读取（0.2.0）。清单的 `version`、`min_app_version` 必须使用有效 SemVer；最低版本高于应用版本时，检查、安装和启用都会拒绝。文件、URL、ZIP 导入共用此规则。
+
+导入检查通过后可点击“预览主题效果”。预览使用无脚本的 sandbox iframe，与当前应用样式和主题存储隔离；CSP 禁止远程资源，仅允许内联样式及 data 图片/字体。预览不等同于安装。
+
+
+### 用量趋势与纸间时光 1.5
+
+模型设置页将提供商、本地模型、用量统计分成独立卡片。用量趋势支持近 7 天、30 天、90 天及自定义时间，沿用提供商/模型/来源筛选；按本机 UTC 偏移分组（长区间自动合并到最多 90 组）。可切换输入、输出、总 Token 和请求次数，本地为芯片实色图例，提供商为连接斜纹图例。仅汇总已报告值，并提供覆盖数与可展开的数据表，缺失不补零。
+
+纸间时光更新至 1.5.0，通用卡片、执行事件、引用、模型路由及弹窗统一使用纸张、虚线、胶带和叠纸阴影。已安装旧版本时，在主题社区点击“更新”应用新版样式。
diff --git a/backend/app/local_models/runtime.py b/backend/app/local_models/runtime.py
index ed86af0..62edf73 100644
--- a/backend/app/local_models/runtime.py
+++ b/backend/app/local_models/runtime.py
@@ -273,7 +273,7 @@ class LocalSpeech:
         from app.contracts import TranscriptSegment
         result = await runtime.infer("qwen3-asr", "transcription", {"source": str(source.resolve()), "language": language})
         return RoutedTranscript(text=result["text"], source="local",
-                                segments=[TranscriptSegment(**s) for s in result["segments"]])
+                                segments=[TranscriptSegment(**s) for s in result["segments"]], warnings=result.get("warnings", []))
 
     async def match(self, source, reference):
         result = await runtime.infer("eres2netv2", "speaker_matching",
diff --git a/backend/app/local_models/worker.py b/backend/app/local_models/worker.py
index e3b5d50..a60151d 100644
--- a/backend/app/local_models/worker.py
+++ b/backend/app/local_models/worker.py
@@ -9,27 +9,49 @@ import threading
 import time
 
 
-def decode(path, *, limit_seconds=3600):
+def decode(path, *, limit_seconds=3600, warnings=None):
     import av
     import numpy as np
     frames = []
     samples = 0
+    corrupt = 0
     with av.open(path, options={"protocol_whitelist": "file,pipe"}) as container:
         if not container.streams.audio:
             raise ValueError("Media has no audio track")
         resampler = av.AudioResampler(format="fltp", layout="mono", rate=16000)
-        for frame in container.decode(audio=0):
-            for output in resampler.resample(frame):
-                audio = output.to_ndarray().reshape(-1)
-                samples += len(audio)
+        for packet in container.demux(audio=0):
+            try:
+                decoded = packet.decode()
+            except av.error.InvalidDataError:
+                corrupt += 1
+                if corrupt > 100:
+                    raise ValueError("Too many damaged audio packets")
+                # Retain the missing packet's duration as silence so later timestamps do not shift.
+                missing = max(0, round(float((packet.duration or 0) * (packet.time_base or 0)) * 16000))
+                samples += missing
                 if samples > limit_seconds * 16000:
                     raise ValueError("Audio exceeds one hour")
-                frames.append(audio)
+                if missing:
+                    frames.append(np.zeros(missing, dtype=np.float32))
+                continue
+            for frame in decoded:
+                for output in resampler.resample(frame):
+                    audio = output.to_ndarray().reshape(-1)
+                    samples += len(audio)
+                    if samples > limit_seconds * 16000:
+                        raise ValueError("Audio exceeds one hour")
+                    frames.append(audio)
         for output in resampler.resample(None):
-            frames.append(output.to_ndarray().reshape(-1))
+            audio = output.to_ndarray().reshape(-1)
+            samples += len(audio)
+            if samples > limit_seconds * 16000:
+                raise ValueError("Audio exceeds one hour")
+            frames.append(audio)
     if not frames:
         raise ValueError("Audio is empty")
     audio = np.concatenate(frames).astype(np.float32)
+    if corrupt and warnings is not None:
+        warnings.append(f"MEDIA_CORRUPT_PACKETS_SKIPPED:{corrupt}")
     if not np.isfinite(audio).all() or len(audio) < 1600:
         raise ValueError("Invalid or too short audio")
     return audio
@@ -125,7 +147,8 @@ def run(request):
             model = Qwen3ASRModel.from_pretrained(path, dtype=torch.float32 if device == "cpu" else torch.float16,
                 device_map=device, attn_implementation="sdpa", max_inference_batch_size=1, max_new_tokens=512)
             loaded = time.monotonic()
-            audio = decode(payload["source"])
+            decode_warnings = []
+            audio = decode(payload["source"], warnings=decode_warnings)
             audio_seconds = len(audio) / 16000
             regions = speech_regions(audio)
             language = {"zh": "Chinese", "en": "English", "ja": "Japanese", "yue": "Cantonese"}.get(payload.get("language"), payload.get("language"))
@@ -137,7 +160,7 @@ def run(request):
                                      "end_time": end / 16000, "text": output.text, "language": output.language})
                     sys.__stdout__.write(json.dumps({"progress": end / len(audio), "segment": segments[-1]}, ensure_ascii=False) + "\n")
                     sys.__stdout__.flush()
-            result = {"text": "\n".join(s["text"] for s in segments), "segments": segments}
+            result = {"text": "\n".join(s["text"] for s in segments), "segments": segments, "warnings": decode_warnings}
         elif operation == "speaker_matching":
             model = speaker_model(path, device)
             loaded = time.monotonic()
diff --git a/backend/app/media_routes.py b/backend/app/media_routes.py
index 221ffb1..40cceef 100644
--- a/backend/app/media_routes.py
+++ b/backend/app/media_routes.py
@@ -18,7 +18,9 @@ from app.services import transcription_service as jobs
 from app.services.attachment_service import attachment_path
 
 router = APIRouter(prefix="/api/media", tags=["Media"])
-MAX_UPLOAD_BYTES = 25 * 1024 * 1024
+from app.providers.routing import MAX_LOCAL_MEDIA_BYTES
+
+MAX_UPLOAD_BYTES = MAX_LOCAL_MEDIA_BYTES
 MEDIA_SUFFIXES = {".wav", ".mp3", ".flac", ".ogg", ".m4a", ".mp4", ".webm", ".txt", ".md"}
 
 
@@ -40,7 +42,7 @@ async def upload_attachment(request: Request, filename: str = Query(min_length=1
             async for chunk in request.stream():
                 size += len(chunk)
                 if size > MAX_UPLOAD_BYTES:
-                    raise ApiError(413, "ATTACHMENT_TOO_LARGE", "Attachment exceeds 25 MiB.")
+                    raise ApiError(413, "ATTACHMENT_TOO_LARGE", "Attachment exceeds 128 MiB.")
                 digest.update(chunk)
                 stream.write(chunk)
         if not size:
diff --git a/backend/app/providers/routing.py b/backend/app/providers/routing.py
index d4630fe..ec247b4 100644
--- a/backend/app/providers/routing.py
+++ b/backend/app/providers/routing.py
@@ -31,6 +31,7 @@ from app.retrieval.provenance import record_embedding
 CAPABILITIES = ("embedding", "transcription", "speaker_matching")
 HTTP_TYPES = {ProviderType.openai_chat, ProviderType.openai_compatible}
 MAX_MEDIA_BYTES = 25 * 1024 * 1024
+MAX_LOCAL_MEDIA_BYTES = 128 * 1024 * 1024
 MAX_RESPONSE_BYTES = 16 * 1024 * 1024
 
 
@@ -58,6 +59,7 @@ class RoutedTranscript:
     source: str
     fallback_reason: str | None = None
     segments: list = field(default_factory=list)
+    warnings: list[str] = field(default_factory=list)
 
 
 def invalid_response() -> ProviderError:
@@ -276,21 +278,22 @@ class ModelRoutingService:
                                dimensions=local_embedding.dim, fallback_reason=reason)
 
     @staticmethod
-    def _media_file(path: Path):
+    def _media_file(path: Path, *, local_only: bool = False):
         try:
             handle = path.open("rb")
         except OSError as exc:
             raise ApiError(404, "ATTACHMENT_NOT_FOUND", "Audio attachment was not found.") from exc
         import os
-        if not 0 < os.fstat(handle.fileno()).st_size <= MAX_MEDIA_BYTES:
+        limit = MAX_LOCAL_MEDIA_BYTES if local_only else MAX_MEDIA_BYTES
+        if not 0 < os.fstat(handle.fileno()).st_size <= limit:
             handle.close()
-            raise ApiError(413, "ATTACHMENT_TOO_LARGE", "Audio attachment must be between 1 byte and 25 MiB.")
+            raise ApiError(413, "ATTACHMENT_TOO_LARGE", f"Audio attachment must be between 1 byte and {limit // (1024 * 1024)} MiB.")
         return handle
 
     async def transcribe(self, source: Path, language: str | None, *, local_only: bool = False) -> RoutedTranscript:
         binding = None if local_only else self.configuration().transcription
         if binding is None:
-            with self._media_file(source):
+            with self._media_file(source, local_only=local_only):
                 pass
         reason = None
         if binding:
@@ -343,7 +346,7 @@ class ModelRoutingService:
     async def match_speakers(self, source: Path, reference: Path, *, local_only: bool = False) -> SpeakerMatchResult:
         binding = None if local_only else self.configuration().speaker_matching
         if binding is None:
-            with self._media_file(source), self._media_file(reference):
+            with self._media_file(source, local_only=local_only), self._media_file(reference, local_only=local_only):
                 pass
         reason = None
         if binding:
diff --git a/backend/app/services/transcription_service.py b/backend/app/services/transcription_service.py
index aef3d7c..da4f808 100644
--- a/backend/app/services/transcription_service.py
+++ b/backend/app/services/transcription_service.py
@@ -82,8 +82,9 @@ async def create_transcription(attachment_id, language=None, *, diarization=Fals
     actual = source if source.is_file() else attachment_path(f"{attachment_id}.txt")
     if not actual.is_file():
         raise ApiError(404, "ATTACHMENT_NOT_FOUND", "Attachment was not found.")
-    if not 0 < actual.stat().st_size <= 25 * 1024 * 1024:
-        raise ApiError(413, "ATTACHMENT_TOO_LARGE", "Attachment must be between 1 byte and 25 MiB.")
+    from app.providers.routing import MAX_LOCAL_MEDIA_BYTES, MAX_MEDIA_BYTES
+    if not 0 < actual.stat().st_size <= (MAX_LOCAL_MEDIA_BYTES if local_only else MAX_MEDIA_BYTES):
+        raise ApiError(413, "ATTACHMENT_TOO_LARGE", "仅本地处理最大支持 128 MiB；超过 25 MiB 的录音请启用仅本地处理。")
     digest = await asyncio.to_thread(lambda: hashlib.sha256(actual.read_bytes()).hexdigest())
     from app.container import container
     from app.local_models.runtime import configuration
@@ -160,6 +161,7 @@ async def _execute(job_id, request, routing=None):
             result = await (routing or container.model_routing).transcribe(source, request.language, local_only=request.local_only)
             job.text, job.source, job.fallback_reason = result.text, result.source, result.fallback_reason
             job.segments = getattr(result, "segments", []) or []
+            job.warnings.extend(getattr(result, "warnings", []) or [])
         if not job.text or not job.text.strip():
             raise ApiError(422, "TRANSCRIPT_EMPTY", "Transcript is empty.")
         if request.diarization:
diff --git a/backend/app/services/usage_service.py b/backend/app/services/usage_service.py
index fe13413..0be5ab5 100644
--- a/backend/app/services/usage_service.py
+++ b/backend/app/services/usage_service.py
@@ -6,7 +6,7 @@ import logging
 import math
 from contextlib import closing
 from contextvars import ContextVar
-from datetime import datetime, timezone
+from datetime import datetime, timezone, timedelta
 from uuid import uuid4
 
 from app.database.db import connect
@@ -107,8 +107,8 @@ class UsageAttempt:
             logger.warning("Usage persistence failed; model response remains available")
 
 
-def aggregate(start, end, provider_id=None, model=None, source=None):
-    query = "SELECT counters_json,completed,capability FROM model_usage WHERE started_at>=? AND started_at<?"
+def aggregate(start, end, provider_id=None, model=None, source=None, timezone_offset=0):
+    query = "SELECT counters_json,completed,capability,started_at,source FROM model_usage WHERE started_at>=? AND started_at<?"
     args = [start.astimezone(timezone.utc).isoformat(), end.astimezone(timezone.utc).isoformat()]
     for column, value in (("provider_id", provider_id), ("model", model), ("source", source)):
         if value:
@@ -117,6 +117,18 @@ def aggregate(start, end, provider_id=None, model=None, source=None):
     with closing(connection()) as conn:
         rows = conn.execute(query, args).fetchall()
         options = conn.execute("SELECT DISTINCT provider_id,model,source FROM model_usage ORDER BY provider_id,model").fetchall()
+    # Calendar buckets use the caller's UTC offset; absent counters remain null.
+    zone = timezone(timedelta(minutes=timezone_offset))
+    first = start.astimezone(zone).date()
+    last = (end - timedelta(microseconds=1)).astimezone(zone).date()
+    days = (last - first).days + 1
+    step = max(1, (days + 89) // 90)
+    series = []
+    for offset in range(0, days, step):
+        date = first + timedelta(days=offset)
+        series.append({"date": date.isoformat(), "end_date": (first + timedelta(days=min(days-1, offset+step-1))).isoformat(),
+                       "local": {"requests": 0, "totals": {key: None for key in METRICS}, "coverage": {key: 0 for key in METRICS}},
+                       "api": {"requests": 0, "totals": {key: None for key in METRICS}, "coverage": {key: 0 for key in METRICS}}})
     totals = {key: None for key in METRICS}
     coverage = {key: 0 for key in METRICS}
     hits, eligible_input, cache_requests = 0, 0, 0
@@ -125,6 +137,13 @@ def aggregate(start, end, provider_id=None, model=None, source=None):
         if row[2] in {"transcription", "speaker_matching"}:
             audio_requests += 1
         counts = json.loads(row[0])
+        date = datetime.fromisoformat(row[3]).astimezone(zone).date()
+        bucket = series[(date - first).days // step][row[4]]
+        bucket['requests'] += 1
+        for key in METRICS:
+            if counts.get(key) is not None:
+                bucket['totals'][key] = (bucket['totals'][key] or 0) + counts[key]
+                bucket['coverage'][key] += 1
         if counts.get("audio_seconds") is not None:
             audio_covered += 1
             audio_seconds = (audio_seconds or 0) + counts["audio_seconds"]
@@ -140,4 +159,4 @@ def aggregate(start, end, provider_id=None, model=None, source=None):
             "complete_requests": sum(row[1] for row in rows), "cache_covered_requests": cache_requests,
             "cache_hit_rate": hits / eligible_input if eligible_input else None,
             "options": [dict(row) for row in options], "start": start, "end": end,
-            "scope": "application_observed_usage"}
+            "scope": "application_observed_usage", "series": series, "timezone_offset": timezone_offset}
diff --git a/backend/app/usage_routes.py b/backend/app/usage_routes.py
index 4d096ce..a96d962 100644
--- a/backend/app/usage_routes.py
+++ b/backend/app/usage_routes.py
@@ -9,11 +9,11 @@ router = APIRouter(prefix="/api/usage", tags=["Usage"])
 @router.get("")
 async def usage(start: datetime | None = None, end: datetime | None = None,
                 provider_id: str | None = Query(None, max_length=200), model: str | None = Query(None, max_length=200),
-                source: str | None = None):
+                source: str | None = None, timezone_offset: int = Query(0, ge=-840, le=840)):
     end = end or datetime.now(timezone.utc)
     start = start or end - timedelta(days=7)
     if not start.tzinfo or not end.tzinfo or end <= start:
         raise ApiError(422, "INVALID_TIME_RANGE", "Provide timezone-aware start/end with end after start.")
     if source not in {None, "local", "api"}:
         raise ApiError(422, "INVALID_USAGE_SOURCE", "Unknown usage source.")
-    return aggregate(start, end, provider_id, model, source)
+    return aggregate(start, end, provider_id, model, source, timezone_offset)
diff --git a/backend/tests/test_large_local_media.py b/backend/tests/test_large_local_media.py
new file mode 100644
index 0000000..1a6f345
--- /dev/null
+++ b/backend/tests/test_large_local_media.py
@@ -0,0 +1,69 @@
+import asyncio
+import sys
+from contextlib import nullcontext
+from types import SimpleNamespace
+
+import pytest
+
+from app.errors import ApiError
+from app.providers.routing import ModelRoutingService, MAX_LOCAL_MEDIA_BYTES, MAX_MEDIA_BYTES, RoutedTranscript
+from app.services import transcription_service as jobs
+from app.config import get_settings
+
+
+def test_large_media_requires_local_only_and_respects_size_limit():
+    path = get_settings().attachments_path / 'large.mp3'
+    path.parent.mkdir(parents=True, exist_ok=True)
+    with path.open('wb') as file:
+        file.truncate(MAX_MEDIA_BYTES + 1)
+    with pytest.raises(ApiError):
+        ModelRoutingService._media_file(path)
+    with ModelRoutingService._media_file(path, local_only=True):
+        pass
+    with pytest.raises(ApiError):
+        asyncio.run(jobs.create_transcription('large.mp3', local_only=False))
+    with path.open('wb') as file:
+        file.truncate(MAX_LOCAL_MEDIA_BYTES + 1)
+    with pytest.raises(ApiError):
+        ModelRoutingService._media_file(path, local_only=True)
+
+
+def test_decode_recovers_one_corrupt_packet_without_shifting_following_audio(monkeypatch):
+    from app.local_models.worker import decode
+    class Samples(list):
+        def reshape(self, *_): return self
+        def astype(self, *_): return self
+        def to_ndarray(self): return self
+    class InvalidDataError(Exception): pass
+    def broken(): raise InvalidDataError()
+    packets = [SimpleNamespace(decode=lambda: [Samples([1] * 3200)]),
+               SimpleNamespace(decode=broken, duration=100, time_base=.001),
+               SimpleNamespace(decode=lambda: [Samples([2] * 3200)])]
+    container = SimpleNamespace(streams=SimpleNamespace(audio=[1]), demux=lambda **_: iter(packets))
+    fake_av = SimpleNamespace(open=lambda *_a, **_kw: nullcontext(container),
+        error=SimpleNamespace(InvalidDataError=InvalidDataError),
+        AudioResampler=lambda **_: SimpleNamespace(resample=lambda frame: [] if frame is None else [frame]))
+    fake_numpy = SimpleNamespace(float32=float, zeros=lambda count, **_: Samples([0] * count),
+        concatenate=lambda frames: Samples(value for frame in frames for value in frame),
+        isfinite=lambda _: SimpleNamespace(all=lambda: True))
+    monkeypatch.setitem(sys.modules, 'av', fake_av)
+    monkeypatch.setitem(sys.modules, 'numpy', fake_numpy)
+    warnings = []
+    output = decode('test.mp3', warnings=warnings)
+    assert output == [1] * 3200 + [0] * 1600 + [2] * 3200
+    assert warnings == ['MEDIA_CORRUPT_PACKETS_SKIPPED:1']
+    with pytest.raises(ValueError, match='one hour'):
+        decode('test.mp3', limit_seconds=.25)
+
+
+def test_decode_warning_reaches_persisted_job(monkeypatch):
+    from app.container import container
+    path = get_settings().attachments_path / 'audio.mp3'
+    path.parent.mkdir(parents=True, exist_ok=True)
+    path.write_bytes(b'audio')
+    async def transcribe(*_args, **_kwargs):
+        return RoutedTranscript(text='decoded', source='local', warnings=['MEDIA_CORRUPT_PACKETS_SKIPPED:1'])
+    monkeypatch.setattr(container.model_routing, 'transcribe', transcribe)
+    job = asyncio.run(jobs.create_transcription('audio.mp3', local_only=True))
+    assert job.status == 'completed'
+    assert jobs.require_job(job.job_id).warnings == ['MEDIA_CORRUPT_PACKETS_SKIPPED:1']
diff --git a/backend/tests/test_usage_overrides.py b/backend/tests/test_usage_overrides.py
index b29e8d6..9a310c5 100644
--- a/backend/tests/test_usage_overrides.py
+++ b/backend/tests/test_usage_overrides.py
@@ -92,3 +92,25 @@ def test_real_adapter_body_and_usage_persistence():
     result = summary()
     assert result["request_count"] == 1 and result["totals"]["input_tokens"] == 10
     assert result["complete_requests"] == 1
+
+
+def test_usage_calendar_series_splits_sources_and_preserves_missing_counters():
+    start = datetime(2026, 9, 1, tzinfo=timezone.utc)
+    for source, hour, count in [('local', 15, 0), ('api', 16, 12), ('api', 17, None)]:
+        attempt = UsageAttempt('p', 'm', 'openai_compatible', source=source)
+        attempt.started_at = (start + timedelta(hours=hour)).isoformat()
+        if count is not None:
+            attempt.observe({'usage': {'input_tokens': count}})
+        attempt.persist()
+    result = aggregate(start, start + timedelta(days=2), timezone_offset=480)
+    assert result['series'][0]['local']['totals']['input_tokens'] == 0
+    second = result['series'][1]
+    assert second['date'] == '2026-09-02'
+    assert second['api']['requests'] == 2
+    assert second['api']['totals']['input_tokens'] == 12
+    assert second['api']['coverage']['input_tokens'] == 1
+    assert second['api']['totals']['output_tokens'] is None
+    assert sum(b['api']['requests'] + b['local']['requests'] for b in result['series']) == result['request_count']
+    filtered = aggregate(start, start + timedelta(days=2), source='local', timezone_offset=480)
+    assert all(b['api']['requests'] == 0 for b in filtered['series'])
+    assert len(aggregate(start, start + timedelta(days=3660))['series']) <= 90
diff --git a/docs/architecture/第二阶段团队分工表.md b/docs/architecture/第二阶段团队分工表.md
index 3ae6cc9..1ddca6c 100644
--- a/docs/architecture/第二阶段团队分工表.md
+++ b/docs/architecture/第二阶段团队分工表.md
@@ -1,5 +1,21 @@
 # 第二阶段团队分工表
 
+## 2026-09-05 当前完成情况补充（不含杨侧验收）
+
+以下状态补充早期任务清单，历史未勾选项不再单独作为实时完成率依据。杨星萱负责的 Benchmark、检索调优、导出及函数图像不在本次验收范围。
+
+- A/B/C/C.1/D 基础工程已落地；E 的离线协议验证已通过，真实目标厂商专项待完成。
+- Theme：补齐 SemVer 最低版本拒绝、文件/URL/ZIP 共用校验及安装前隔离视觉预览。
+- Mermaid：真实编辑器及 Markdown 预览接入缩放、重置、大图查看；编辑器预览复制导致的异步标记丢失已修复。
+- Agent Trace：支持关键词、事件类型、工具及仅错误筛选，保留树的祖先节点和引用定位。
+- F：本地 Qwen3-ASR、ERes2NetV2、Bekko 已完成 37 分 16 秒录音的 CUDA 转写、片段聚类、笔记及向量检索闭环，约 661 秒生成 441 片段；无参考标注，质量专项保持未完成。
+- Provider：卡片显示启用状态，支持直接启停与保存失败反馈。
+- Plugin context_menu/toolbar 按已有本地计划仍是后续增强，当前实际挂载 command_palette 与详情命令；不将声明 Contract 视为已挂载。
+- 逐字强制对齐、多人重叠语音未实现；说话人阈值、准确率、真实厂商专项未验收。Tauri/Rust、生产沙箱仍属于后续阶段。
+
+本轮自动化基线为后端 577 项、前端 280 项及前端生产构建通过。长录音无标注，测试通过不等于质量或所有第二阶段专项全部完成。详细证据见 `docs/development/阶段F收尾验收记录.md`；本地运行文件不提交。
+
+
 ## 一、阶段目标
 
 第二阶段延续第一阶段已经形成的模块边界，重点推进多模态输入、MCP 与 Plugin 扩展、更多 Provider、RAG / Agent Benchmark、多格式导出、主题社区格式、Agent Trace 可视化、Mermaid 渲染和函数图像绘制。
diff --git a/docs/development/多模态管线与模型运行开发说明.md b/docs/development/多模态管线与模型运行开发说明.md
index d6175e5..79eb184 100644
--- a/docs/development/多模态管线与模型运行开发说明.md
+++ b/docs/development/多模态管线与模型运行开发说明.md
@@ -144,3 +144,11 @@ cd backend
 .venv/Scripts/python scripts/local-model-smoke.py qwen3-asr --download --audio C:/path/to/speech.wav
 .venv/Scripts/python scripts/local-model-smoke.py eres2netv2 --download --audio C:/path/to/speech.wav --reference C:/path/to/reference.wav
 ```
+
+
+## 2026-09-05 长录音与 Provider 状态补充
+
+- 附件上传上限为 128 MiB。超过 25 MiB 的音频必须明确选择 `local_only=true`；可联网任务仍限制为 25 MiB，前后端及路由均检查。解码时长仍限制为一小时。
+- 本地解码允许跳过少量损坏音频包，按包中可取得的时长补静音，并返回 `MEDIA_CORRUPT_PACKETS_SKIPPED:<数量>`。超过 100 个损坏包则失败；缺少有效包时长时无法承诺时间对齐，应结合原音频复核。此处理不能恢复丢失语音。
+- Provider 卡片显示“已启用/已停用”，支持直接启停。保存成功后更新状态；失败保留原状态。停用或保存期间禁用测试与刷新模型操作。
+- 37 分 16 秒的用户录音已完成 CUDA 转写、片段级说话人聚类、笔记生成、本地向量索引及检索命中。无参考标注，不报告准确率。详见《阶段F收尾验收记录》的长录音补充；此前短样本记录保留为历史证据。
diff --git a/docs/development/阶段F收尾验收记录.md b/docs/development/阶段F收尾验收记录.md
index 53141de..474f1a3 100644
--- a/docs/development/阶段F收尾验收记录.md
+++ b/docs/development/阶段F收尾验收记录.md
@@ -47,9 +47,29 @@ CPU 与 CUDA 分别创建隔离 Vault、附件目录和 SQLite，只读取固定
 
 ## 未关闭的专项验收
 
-- 带参考转写和说话人标注的真实课程长录音尚未提供，不能报告 CER/WER、DER、阈值或长音频吞吐达标。
+- 已提供无标注长录音，CUDA 功能与单次耗时验证见下文。参考转写和说话人标注仍缺失，不能报告 CER/WER、DER、阈值或业务吞吐达标。
 - 现阶段时间戳为片段级；逐字强制对齐、同段多人/重叠语音仍未实现，不将片段聚类视为完整说话人分离。
 - 外部供应商特殊 JSON 的兼容性，需要在目标账号和模型上点击实际推理验证；离线协议通过不替代厂商验收。
 - Tauri/Rust Host 和生产 MCP 沙箱按后续阶段安排；本轮数据持久化在后端 SQLite/Vault，为桌面集成保留稳定接口。
 
 结论：阶段 F 本轮工程收尾已实现并完成 CPU/CUDA 功能验收；上述质量及外部服务专项保持待验收状态，不标记为全部通过。分支仍需独立审阅后决定合并。
+
+
+## 2026-09-05 长录音补充验收
+
+用户授权使用本机 CUDA，只做本地处理。使用隔离的 SQLite、附件目录与 Vault，读取已安装的固定 revision 权重；原音频、转写正文和独立运行报告保留在被忽略的 `.local-plans`，不入库。
+
+| 观察项 | 本次结果 |
+| --- | --- |
+| 输入 | MP3，89,424,101 字节，2235.60 秒（约 37 分 16 秒） |
+| 转写与片段聚类 | completed；441 个片段，5 个说话人聚类 |
+| 两环节总耗时 | 约 661 秒（轮询含最多约 10 秒误差），RTF 约 0.296 |
+| Qwen3-ASR 实际设备 / 加载 / 推理 | cuda:0 / 10.52 秒 / 607.78 秒 |
+| ERes2NetV2 实际设备 / 加载 / 推理 | cuda:0 / 3.97 秒 / 28.88 秒 |
+| 后续链路 | Markdown 笔记生成、本地 Bekko 索引、向量检索命中均通过 |
+| 隐私标记 | 导出笔记保留 `embedding_local_only: true` |
+| 警告 | 1 个损坏音频包按时长补静音；说话人结果为片段级 |
+
+最初实测暴露了 25 MiB 限制和单个损坏 MP3 包导致整任务失败，已修复并用同一输入重新跑通。5 个聚类不是已确认的真实人数；没有参考转写或说话人标注，因此不计算 CER/WER、DER 或 FAR/FRR。单次耗时也不作为跨设备吞吐承诺。逐字对齐、重叠语音和目标厂商真实验收仍未关闭。
+
+本轮自动化基线：后端 577 项、前端 280 项通过，前端类型与生产构建通过；构建仍有既有大 chunk 提示。离线 Provider 测试不代替目标账号实测。
diff --git a/frontend/package.json b/frontend/package.json
index f6bfc1b..f56283b 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -1,7 +1,7 @@
 {
   "name": "notes-agent-frontend",
   "private": true,
-  "version": "0.1.0",
+  "version": "0.2.0",
   "type": "module",
   "scripts": {
     "dev": "vite",
@@ -39,6 +39,7 @@
     "marked": "^15.0.0",
     "mermaid": "^11.17.2",
     "pinia": "^4.0.0",
+    "semver": "^7.8.5",
     "shiki": "^4.4.3",
     "vue": "^3.5.0",
     "vue-router": "^5.0.0",
@@ -46,6 +47,7 @@
   },
   "devDependencies": {
     "@types/node": "^22.0.0",
+    "@types/semver": "^7.8.0",
     "@vitejs/plugin-vue": "^5.0.0",
     "@vue/test-utils": "^2.5.0",
     "happy-dom": "^20.11.15",
diff --git a/frontend/pnpm-lock.yaml b/frontend/pnpm-lock.yaml
index 5a0cce2..e22cc37 100644
--- a/frontend/pnpm-lock.yaml
+++ b/frontend/pnpm-lock.yaml
@@ -92,6 +92,9 @@ importers:
       pinia:
         specifier: ^4.0.0
         version: 4.0.3(@vue/devtools-api@8.2.1)(typescript@5.9.3)(vue@3.5.42(typescript@5.9.3))
+      semver:
+        specifier: ^7.8.5
+        version: 7.8.5
       shiki:
         specifier: ^4.4.3
         version: 4.4.3
@@ -108,6 +111,9 @@ importers:
       '@types/node':
         specifier: ^22.0.0
         version: 22.20.1
+      '@types/semver':
+        specifier: ^7.8.0
+        version: 7.8.0
       '@vitejs/plugin-vue':
         specifier: ^5.0.0
         version: 5.2.4(vite@6.4.3(@types/node@22.20.1)(yaml@2.9.0))(vue@3.5.42(typescript@5.9.3))
@@ -895,6 +901,9 @@ packages:
   '@types/node@22.20.1':
     resolution: {integrity: sha512-EANqOCF9QFyra+4pfxUcX9STKJpCLjMbObVzljIJomAWSnuSIEAvyzEU53GaajbXJEgdh0iEcPL+DGvpUd4k1Q==}
 
+  '@types/semver@7.8.0':
+    resolution: {integrity: sha512-1mAINjtQCXXeLkJ9ehXkwOcBpqtLxiVtKhpUf83DdRNdQKV0iXZpaHYqRr7nj+wvxuJzoAmAwXI+sCNMv1CzLQ==}
+
   '@types/trusted-types@2.0.7':
     resolution: {integrity: sha512-ScaPdn1dQczgbl0QFTeTOmVHFULt394XJgOQNoyVhZ6r2vLnMLJfBPd53SB52T/3G36VI1/g2MZaX0cwDuXsfw==}
 
@@ -3247,6 +3256,8 @@ snapshots:
     dependencies:
       undici-types: 6.21.0
 
+  '@types/semver@7.8.0': {}
+
   '@types/trusted-types@2.0.7':
     optional: true
 
diff --git a/frontend/src/assets/themes/paper-moments.theme b/frontend/src/assets/themes/paper-moments.theme
index f92ee31..3caac8f 100644
--- a/frontend/src/assets/themes/paper-moments.theme
+++ b/frontend/src/assets/themes/paper-moments.theme
@@ -1,6 +1,6 @@
 theme_id: paper-moments
 name: 纸间时光 · Paper Moments
-version: 1.4.1
+version: 1.5.0
 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
@@ -266,3 +266,36 @@ license: MIT
 @media (max-width: 720px) {
   [data-theme="paper-moments"] .note-metadata { width: 100%; padding: 22px 18px; }
 }
+
+
+/* Shared paper surfaces across settings, search, agents, media and extensions. */
+[data-theme="paper-moments"] :is(.panel, .item-card, .event-card, .citation-card, .routing-card, .vault-card, .modal-card, .modal, .usage-chart) {
+  position: relative;
+  border: 1px solid #b5a693;
+  border-radius: 8px 14px 8px 8px;
+  outline: 1px dashed #d5c8b5;
+  outline-offset: -6px;
+  background-color: #fffdf5;
+  background-image: repeating-linear-gradient(transparent 0 31px, #b6c7bd18 31px 32px);
+  box-shadow: 3px 4px 0 #d8e6e2, 6px 7px 0 #f0d8cf;
+}
+[data-theme="paper-moments"] :is(.panel, .item-card, .event-card, .citation-card, .routing-card, .vault-card, .modal-card, .modal)::before {
+  content: '';
+  position: absolute;
+  inset: 0 24px auto auto;
+  opacity: 1;
+  transform: none;
+  width: 48px;
+  height: 9px;
+  background: repeating-linear-gradient(45deg, #c5dfe0b0 0 6px, #daeceba0 6px 12px);
+  pointer-events: none;
+}
+[data-theme="paper-moments"] :is(.item-card, .event-card, .citation-card, .routing-card):nth-child(2n)::before {
+  background: repeating-linear-gradient(45deg, #e7bcb3b0 0 6px, #f2d4cba0 6px 12px);
+}
+[data-theme="paper-moments"] :is(.panel, .item-card, .routing-card, .vault-card) :is(h2, h3, h4) {
+  font-family: Georgia, 'Noto Serif SC', 'Songti SC', SimSun, serif;
+  color: #875343;
+}
+[data-theme="paper-moments"] .usage-chart { background-color: #fbf7ea; }
+[data-theme="paper-moments"] .usage-grid > div { padding: 12px; border: 1px dashed #d5c8b5; border-radius: 5px; background: #fffdf580; }
diff --git a/frontend/src/components/common/DiagramInteractions.spec.ts b/frontend/src/components/common/DiagramInteractions.spec.ts
new file mode 100644
index 0000000..2d1c239
--- /dev/null
+++ b/frontend/src/components/common/DiagramInteractions.spec.ts
@@ -0,0 +1,26 @@
+// @vitest-environment happy-dom
+import { expect, it, vi } from 'vitest'
+import { flushPromises, mount } from '@vue/test-utils'
+import DiagramInteractions from './DiagramInteractions.vue'
+import { appendDiagramControls } from '@/utils/diagramControls'
+
+it.each(['markdown-mermaid', 'editor-mermaid-preview'])('handles copied SVG controls in %s', async className => {
+  const container = document.createElement('div')
+  container.className = className
+  container.innerHTML = '<svg viewBox="0 0 400 200"><text>Diagram</text></svg>'
+  appendDiagramControls(container)
+  const wrapper = mount(DiagramInteractions, { slots: { default: container.outerHTML }, attachTo: document.body })
+  const svg = wrapper.get('svg').element as SVGSVGElement
+  await wrapper.get('[data-diagram-action="in"]').trigger('click')
+  expect(svg.style.width).toBe('480px')
+  await wrapper.get('[data-diagram-action="reset"]').trigger('click')
+  expect(svg.style.maxWidth).toBe('')
+  const dialog = document.querySelector('dialog')!
+  const show = vi.fn()
+  dialog.showModal = show
+  await wrapper.get('[data-diagram-action="view"]').trigger('click')
+  await flushPromises()
+  expect(show).toHaveBeenCalledOnce()
+  expect(dialog.textContent).toContain('Diagram')
+  wrapper.unmount()
+})
diff --git a/frontend/src/components/common/DiagramInteractions.vue b/frontend/src/components/common/DiagramInteractions.vue
new file mode 100644
index 0000000..faea966
--- /dev/null
+++ b/frontend/src/components/common/DiagramInteractions.vue
@@ -0,0 +1,71 @@
+<script setup lang="ts">
+import { nextTick, ref } from 'vue'
+import DOMPurify from 'dompurify'
+
+const viewer = ref<HTMLDialogElement | null>(null)
+const svgHtml = ref('')
+const scale = ref(1)
+const baseWidth = ref(800)
+let opener: HTMLElement | null = null
+function widthOf(svg: SVGSVGElement) {
+  return svg.viewBox?.baseVal?.width || Number(svg.getAttribute('viewBox')?.split(/[ ,]+/)[2]) || svg.getBoundingClientRect().width || 800
+}
+async function interact(event: MouseEvent) {
+  if (!(event.target instanceof Element)) return
+  const button = event.target.closest<HTMLElement>('[data-diagram-action]')
+  const diagram = button?.closest<HTMLElement>('.editor-mermaid-preview, .markdown-mermaid')
+  const svg = diagram?.querySelector<SVGSVGElement>('svg')
+  if (!button || !diagram || !svg) return
+  event.preventDefault()
+  event.stopPropagation()
+  const action = button.dataset.diagramAction
+  if (action === 'view') {
+    opener = button
+    baseWidth.value = widthOf(svg)
+    svgHtml.value = DOMPurify.sanitize(svg.outerHTML, { USE_PROFILES: { svg: true, svgFilters: true, html: true } })
+    scale.value = 1
+    await nextTick()
+    viewer.value?.showModal()
+    return
+  }
+  const previous = Number(diagram.dataset.diagramScale || 1)
+  const next = action === 'reset' ? 1 : Math.max(.2, Math.min(5, previous * (action === 'in' ? 1.2 : 1 / 1.2)))
+  diagram.dataset.diagramScale = String(next)
+  svg.style.width = next === 1 ? '' : `${widthOf(svg) * next}px`
+  svg.style.maxWidth = next === 1 ? '' : 'none'
+  svg.style.height = 'auto'
+}
+function close() { viewer.value?.close(); svgHtml.value = ''; opener?.focus() }
+</script>
+
+<template>
+  <div class="diagram-interactions" @click.capture="interact">
+    <slot />
+    <Teleport to="body">
+      <dialog ref="viewer" class="diagram-viewer" aria-label="图表大图查看" @cancel.prevent="close">
+        <header><strong>图表查看</strong><div class="diagram-controls">
+          <button type="button" @click="scale = Math.max(.2, scale / 1.2)">缩小</button>
+          <output>{{ Math.round(scale * 100) }}%</output>
+          <button type="button" @click="scale = Math.min(5, scale * 1.2)">放大</button>
+          <button type="button" @click="scale = 1">重置</button>
+          <button type="button" autofocus @click="close">关闭</button>
+        </div></header>
+        <div class="diagram-viewer-scroll"><div class="diagram-viewer-image" :style="{ width: `${baseWidth * scale}px` }" v-html="svgHtml" /></div>
+      </dialog>
+    </Teleport>
+  </div>
+</template>
+
+<style>
+.diagram-interactions { min-width: 0; }
+.diagram-controls { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; margin: 8px 0; }
+.diagram-controls button { padding: 5px 10px; border: 1px solid var(--color-border-default); border-radius: var(--radius-sm); color: var(--color-text-primary); background: var(--color-surface-primary); cursor: pointer; font: inherit; font-size: 12px; }
+.diagram-controls button:hover { border-color: var(--color-accent-primary); }
+.diagram-controls button:focus-visible { outline: 2px solid var(--color-accent-primary); }
+.diagram-viewer { width: min(1200px, 94vw); max-width: 94vw; height: 85vh; padding: 16px; color: var(--color-text-primary); background: var(--color-background-primary); border: 1px solid var(--color-border-default); border-radius: var(--radius-md); }
+.diagram-viewer::backdrop { background: #0008; }
+.diagram-viewer header { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
+.diagram-viewer-scroll { height: calc(100% - 64px); overflow: auto; }
+.diagram-viewer-image { margin: auto; }
+.diagram-viewer-image svg { width: 100% !important; max-width: none !important; height: auto !important; }
+</style>
diff --git a/frontend/src/components/common/MarkdownContent.vue b/frontend/src/components/common/MarkdownContent.vue
index dd11226..956efdc 100644
--- a/frontend/src/components/common/MarkdownContent.vue
+++ b/frontend/src/components/common/MarkdownContent.vue
@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import DiagramInteractions from './DiagramInteractions.vue'
 import { computed, ref, watch } from 'vue'
 import { renderMarkdown } from '@/utils/markdown'
 import { useThemeStore } from '@/stores/theme'
@@ -19,7 +20,7 @@ watch([() => props.source, diagramTheme, () => themeStore.currentThemeId], async
 </script>
 
 <template>
-  <div class="markdown-content" v-html="html" />
+  <DiagramInteractions><div class="markdown-content" v-html="html" /></DiagramInteractions>
 </template>
 
 <style>
diff --git a/frontend/src/features/agent/TraceTimeline.spec.ts b/frontend/src/features/agent/TraceTimeline.spec.ts
index e9aaedb..3f889d5 100644
--- a/frontend/src/features/agent/TraceTimeline.spec.ts
+++ b/frontend/src/features/agent/TraceTimeline.spec.ts
@@ -41,6 +41,31 @@ async function switchToTree(wrapper: ReturnType<typeof mountTree>) {
 }
 
 describe('TraceTimeline 树形视图', () => {
+  it('filters errors while retaining tree ancestors and final tool data', async () => {
+    const events = sampleEvents()
+    const result = events.find(item => item.event === 'ToolResult')!
+    result.data.success = false
+    result.data.error_code = 'TIMEOUT'
+    const wrapper = mountTree(events)
+    await wrapper.get('input[type="checkbox"]').setValue(true)
+    expect(wrapper.findAll('.event-card')).toHaveLength(1)
+    await switchToTree(wrapper)
+    expect(wrapper.findAll('.tree-node')).toHaveLength(2)
+    expect(wrapper.text()).toContain('TIMEOUT')
+    await wrapper.get('[aria-label="搜索执行轨迹"]').setValue('no-match')
+    expect(wrapper.text()).toContain('没有匹配的事件')
+    wrapper.unmount()
+  })
+  it('filters a tool including its result and keeps citation navigation usable', async () => {
+    const wrapper = mountTree(sampleEvents())
+    await wrapper.get('[aria-label="工具筛选"]').setValue('read_note')
+    expect(wrapper.findAll('.event-card')).toHaveLength(2)
+    await wrapper.findAll('button').find(button => button.text() === '清除筛选')!.trigger('click')
+    await wrapper.get('[aria-label="事件类型"]').setValue('Citation')
+    await wrapper.get('.event-citation').trigger('click')
+    expect(wrapper.emitted('open-citation')).toHaveLength(1)
+    wrapper.unmount()
+  })
   it('叶子节点点击后能看到自己的数据', async () => {
     // 回归：之前行的 click 是 `children.length && toggleExpand(id)`，
     // 而详情 v-if 又要求 children.length === 0 —— 两个条件互斥，
diff --git a/frontend/src/features/agent/TraceTimeline.vue b/frontend/src/features/agent/TraceTimeline.vue
index 65098ef..36b9e63 100644
--- a/frontend/src/features/agent/TraceTimeline.vue
+++ b/frontend/src/features/agent/TraceTimeline.vue
@@ -21,6 +21,32 @@ const expandedNodes = ref<Set<string>>(new Set())
 const detailNodes = ref<Set<string>>(new Set())
 const viewMode = ref<'timeline' | 'tree'>('timeline')
 const showDetails = ref(true)
+const query = ref('')
+const eventType = ref('')
+const toolName = ref('')
+const errorsOnly = ref(false)
+const eventTypes = computed(() => [...new Set(props.events.map(event => event.event))])
+const toolNames = computed(() => [...new Set(props.events.filter(event => event.event === 'ToolCall').map(event => String(event.data.name ?? '')))].filter(Boolean))
+const filtering = computed(() => Boolean(query.value.trim() || eventType.value || toolName.value || errorsOnly.value))
+const filteredEvents = computed(() => {
+  const toolIds = new Set(props.events.filter(event => event.event === 'ToolCall' && event.data.name === toolName.value).map(event => event.data.tool_call_id))
+  return props.events.filter(event => (!eventType.value || event.event === eventType.value)
+    && (!toolName.value || (event.data.tool_call_id != null && toolIds.has(event.data.tool_call_id)))
+    && (!errorsOnly.value || event.event.endsWith('Failed') || Boolean(event.data.error_code) || event.data.success === false || event.data.is_error === true)
+    && (!query.value.trim() || `${eventLabel(event.event)} ${event.event} ${JSON.stringify(event.data)}`.toLowerCase().includes(query.value.trim().toLowerCase())))
+})
+const filteredTree = computed(() => {
+  if (!filtering.value) return traceNodes.value
+  const matches = (node: TraceNode) => filteredEvents.value.some(event => event.sequence === node.sequence
+    || (node.type === 'tool_call' && node.data.tool_call_id != null && node.data.tool_call_id === event.data.tool_call_id)
+    || (node.type === 'model_call' && node.data.model_call_id != null && node.data.model_call_id === event.data.model_call_id))
+  const prune = (nodes: TraceNode[]): TraceNode[] => nodes.flatMap(node => {
+    const children = prune(node.children)
+    return matches(node) || children.length ? [{ ...node, children }] : []
+  })
+  return prune(traceNodes.value)
+})
+function resetFilters() { query.value = ''; eventType.value = ''; toolName.value = ''; errorsOnly.value = false }
 
 const traceNodes = computed(() => buildTraceNodes(props.events))
 const toolCalls = computed(() => getToolCallsFromEvents(props.events))
@@ -119,14 +145,14 @@ function flatNodes(nodes: TraceNode[], depth = 0): Array<{ node: TraceNode; dept
   const result: Array<{ node: TraceNode; depth: number }> = []
   for (const node of nodes) {
     result.push({ node, depth })
-    if (node.children.length > 0 && isExpanded(node.id)) {
+    if (node.children.length > 0 && (filtering.value || isExpanded(node.id))) {
       result.push(...flatNodes(node.children, depth + 1))
     }
   }
   return result
 }
 
-const flatTrace = computed(() => flatNodes(traceNodes.value))
+const flatTrace = computed(() => flatNodes(filteredTree.value))
 </script>
 
 <template>
@@ -165,10 +191,19 @@ const flatTrace = computed(() => flatNodes(traceNodes.value))
       </div>
     </div>
 
+    <div class="trace-filters">
+      <input v-model="query" class="input" aria-label="搜索执行轨迹" placeholder="搜索参数、结果或引用…" />
+      <select v-model="eventType" class="select" aria-label="事件类型"><option value="">全部事件</option><option v-for="kind in eventTypes" :key="kind" :value="kind">{{ eventLabel(kind) }}</option></select>
+      <select v-model="toolName" class="select" aria-label="工具筛选"><option value="">全部工具</option><option v-for="name in toolNames" :key="name" :value="name">{{ name }}</option></select>
+      <label><input v-model="errorsOnly" type="checkbox" /> 仅错误</label>
+      <button v-if="filtering" class="button-secondary" @click="resetFilters">清除筛选</button>
+      <span aria-live="polite">{{ filteredEvents.length }} / {{ events.length }} 事件</span>
+    </div>
+    <p v-if="filtering && !filteredEvents.length" class="subtle" role="status">没有匹配的事件</p>
     <div v-if="viewMode === 'timeline'" class="timeline-view">
       <div class="timeline">
         <article
-          v-for="event in events"
+          v-for="event in filteredEvents"
           :key="event.sequence"
           class="event-card"
           :class="{ expanded: isDetailOpen(`event-${event.sequence}`) }"
@@ -265,7 +300,7 @@ const flatTrace = computed(() => flatNodes(traceNodes.value))
       </div>
     </div>
 
-    <div v-if="toolCalls.length > 0 && viewMode === 'timeline'" class="tool-calls-summary panel">
+    <div v-if="!filtering && toolCalls.length > 0 && viewMode === 'timeline'" class="tool-calls-summary panel">
       <h3 class="panel-title">工具调用统计</h3>
       <div class="tool-call-list">
         <div v-for="call in toolCalls" :key="call.tool_call_id" class="tool-call-item" :class="call.status">
@@ -284,6 +319,10 @@ const flatTrace = computed(() => flatNodes(traceNodes.value))
 </template>
 
 <style scoped>
+.trace-filters { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; padding: 12px; border: 1px solid var(--color-border-default); border-radius: var(--radius-md); background: var(--color-surface-primary); }
+.trace-filters > input { flex: 1 1 220px; min-width: 0; }
+.trace-filters label { display: inline-flex; align-items: center; gap: 6px; white-space: nowrap; }
+.trace-filters span { color: var(--color-text-secondary); font-size: var(--font-size-sm); }
 .trace-visualization {
   display: grid;
   gap: var(--space-lg);
diff --git a/frontend/src/features/editor/VisualMarkdownEditor.vue b/frontend/src/features/editor/VisualMarkdownEditor.vue
index 23e61e0..e5cf8e3 100644
--- a/frontend/src/features/editor/VisualMarkdownEditor.vue
+++ b/frontend/src/features/editor/VisualMarkdownEditor.vue
@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import DiagramInteractions from '@/components/common/DiagramInteractions.vue'
 import { onBeforeUnmount, onMounted, ref, watch } from 'vue'
 import { Link } from '@element-plus/icons-vue'
 import { Crepe } from '@milkdown/crepe'
@@ -68,7 +69,7 @@ function renderDiagram(source: string, apply: (value: HTMLElement) => void) {
     if (entry.apply === apply) diagramPreviews.delete(id)
   }
   const element = createMermaidPreview(source, themeStore.isDark, apply)
-  diagramPreviews.set(element.id, { source, apply })
+  diagramPreviews.set(element.dataset.previewId!, { source, apply })
   return element
 }
 watch(() => themeStore.currentThemeId, () => {
@@ -264,7 +265,7 @@ defineExpose({ getEditor: () => crepe?.editor })
 </script>
 
 <template>
-  <div class="visual-editor">
+  <DiagramInteractions class="visual-editor">
     <div class="markdown-toolbar" role="toolbar" :aria-label="t('Markdown 格式工具栏', 'Markdown formatting toolbar')">
       <label class="toolbar-select heading-select" :title="t('设置标题级别', 'Set heading level')">
         <span class="format-glyph heading-glyph">H</span>
@@ -313,7 +314,7 @@ defineExpose({ getEditor: () => crepe?.editor })
       </section>
       <div ref="editorRoot" />
     </div>
-  </div>
+  </DiagramInteractions>
 </template>
 
 <style scoped>
diff --git a/frontend/src/features/editor/diagramIntegration.spec.ts b/frontend/src/features/editor/diagramIntegration.spec.ts
new file mode 100644
index 0000000..a80913e
--- /dev/null
+++ b/frontend/src/features/editor/diagramIntegration.spec.ts
@@ -0,0 +1,28 @@
+// @vitest-environment happy-dom
+import { afterEach, expect, it, vi } from 'vitest'
+import { mount, type VueWrapper } from '@vue/test-utils'
+import { createPinia, setActivePinia } from 'pinia'
+import { getMarkdown } from '@milkdown/kit/utils'
+import type { Editor } from '@milkdown/kit/core'
+import VisualMarkdownEditor from './VisualMarkdownEditor.vue'
+
+vi.mock('@/services/mermaidService', () => ({ renderMermaid: vi.fn(async () => ({ svg: '<svg viewBox="0 0 400 200"><text>Diagram</text></svg>', warnings: [], width: 400, height: 200 })) }))
+let wrapper: VueWrapper
+afterEach(() => { wrapper?.unmount(); document.body.innerHTML = ''; vi.unstubAllGlobals() })
+it('keeps diagram buttons usable after real Milkdown preview copying without changing Markdown', async () => {
+  localStorage.clear()
+  setActivePinia(createPinia())
+  vi.stubGlobal('IntersectionObserver', class {
+    constructor(private callback: IntersectionObserverCallback) {}
+    observe(target: Element) { queueMicrotask(() => this.callback([{ isIntersecting: true, target } as IntersectionObserverEntry], this as unknown as IntersectionObserver)) }
+    unobserve() {}
+    disconnect() {}
+  })
+  wrapper = mount(VisualMarkdownEditor, { props: { initialContent: '```mermaid\ngraph TD; A-->B\n```' }, attachTo: document.body })
+  await vi.waitFor(() => expect(wrapper.find('[data-diagram-action="in"]').exists()).toBe(true), { timeout: 3000 })
+  const editor = (wrapper.vm as unknown as { getEditor(): Editor }).getEditor()
+  const before = editor.action(getMarkdown())
+  await wrapper.get('[data-diagram-action="in"]').trigger('click')
+  expect((wrapper.get('.editor-mermaid-preview svg').element as SVGSVGElement).style.width).toBe('480px')
+  expect(editor.action(getMarkdown())).toBe(before)
+})
diff --git a/frontend/src/features/editor/mermaidPreview.spec.ts b/frontend/src/features/editor/mermaidPreview.spec.ts
index 951c739..30f3874 100644
--- a/frontend/src/features/editor/mermaidPreview.spec.ts
+++ b/frontend/src/features/editor/mermaidPreview.spec.ts
@@ -23,7 +23,7 @@ it('renders SVG with the requested theme and keeps async revisions isolated', as
   expect(oldPublish).not.toHaveBeenCalled()
   expect(latestPublish).toHaveBeenCalledWith(latest)
   expect(latestPublish.mock.calls[0]![0]).not.toBe(latest)
-  document.getElementById(latest.id)?.remove()
+  document.body.replaceChildren()
   expect(renderMermaid).toHaveBeenLastCalledWith('graph TD; A-->C', { theme: 'dark' })
 })
 
@@ -31,7 +31,7 @@ it('shows syntax errors as text without executing markup', async () => {
   vi.mocked(renderMermaid).mockResolvedValueOnce({ svg: '', warnings: ['<img src=x onerror=alert(1)>'], width: 0, height: 0 })
   const preview = createMermaidPreview('invalid', false, vi.fn())
   await flushPromises()
-  expect(preview.classList.contains('has-error')).toBe(true)
+  expect(preview.querySelector('.has-error')).not.toBeNull()
   expect(preview.querySelector('img')).toBeNull()
   expect(preview.textContent).toContain('点击编辑')
 })
diff --git a/frontend/src/features/editor/mermaidPreview.ts b/frontend/src/features/editor/mermaidPreview.ts
index 64c6e36..bd0c23b 100644
--- a/frontend/src/features/editor/mermaidPreview.ts
+++ b/frontend/src/features/editor/mermaidPreview.ts
@@ -1,13 +1,19 @@
 import { nextTick } from 'vue'
 import { renderMermaid } from '@/services/mermaidService'
 import { t } from '@/i18n'
+import { appendDiagramControls } from '@/utils/diagramControls'
 
 let previewId = 0
 export function createMermaidPreview(source: string, dark: boolean, applyPreview: (value: HTMLElement) => void): HTMLElement {
   // Each revision owns its element, so a slow render cannot replace newer content.
+  // Milkdown sanitizes Element input to its inner HTML; retain the revision
+  // marker and controls inside an otherwise disposable envelope.
+  const envelope = document.createElement('div')
   const container = document.createElement('div')
+  envelope.append(container)
   container.className = 'editor-mermaid-preview'
   container.id = `editor-mermaid-preview-${++previewId}`
+  envelope.dataset.previewId = container.id
   container.setAttribute('aria-live', 'polite')
   container.textContent = t('正在渲染图表…', 'Rendering diagram…')
   const publish = async () => {
@@ -18,7 +24,7 @@ export function createMermaidPreview(source: string, dark: boolean, applyPreview
     if (visible) {
       // PreviewPanel copies HTML instead of retaining the supplied element.
       // Update the current copy through Milkdown's reactive callback.
-      applyPreview(container.cloneNode(true) as HTMLElement)
+      applyPreview(envelope.cloneNode(true) as HTMLElement)
     }
   }
   void renderMermaid(source, { theme: dark ? 'dark' : 'light' }).then(result => {
@@ -30,10 +36,11 @@ export function createMermaidPreview(source: string, dark: boolean, applyPreview
     }
     // Mermaid runs in strict mode; Milkdown sanitizes the preview before insertion.
     container.innerHTML = result.svg
+    appendDiagramControls(container)
     void publish()
   }).catch(() => {
     container.textContent = t('图表渲染失败，请点击编辑检查源码。', 'Unable to render diagram. Choose Edit to inspect the source.')
     void publish()
   })
-  return container
+  return envelope
 }
diff --git a/frontend/src/features/media/MediaView.vue b/frontend/src/features/media/MediaView.vue
index a5846f0..9a6f774 100644
--- a/frontend/src/features/media/MediaView.vue
+++ b/frontend/src/features/media/MediaView.vue
@@ -32,7 +32,9 @@ const labels = computed(() => ({queued: t('排队中', 'Queued'), running: t('
 const speakers = computed(() => [...new Set(selected.value?.segments.map(s => s.speaker).filter((s): s is string => !!s) || [])])
 const active = (job: MediaJob) => ['queued', 'running', 'processing'].includes(job.status)
 const stamp = (seconds: number) => `${Math.floor(seconds / 60).toString().padStart(2, '0')}:${Math.floor(seconds % 60).toString().padStart(2, '0')}`
-const warningLabel = (warning: string) => ({
+const warningLabel = (warning: string) => warning.startsWith('MEDIA_CORRUPT_PACKETS_SKIPPED:')
+  ? t(`已跳过 ${warning.split(':')[1]} 个损坏音频包；缺失时长以静音保留，请校对受影响内容。`, `Skipped ${warning.split(':')[1]} damaged audio packets; missing duration was retained as silence. Review the affected content.`)
+  : ({
   DIARIZATION_UNAVAILABLE: t('当前无法分离说话人', 'Speaker identification is unavailable'),
   WORD_TIMESTAMPS_UNAVAILABLE: t('未提供逐字时间戳', 'Word-level timestamps are unavailable'),
   DIARIZATION_SEGMENT_LEVEL: t('说话人按音频段估计，同段多人或重叠发言需人工校对', 'Speakers are estimated per segment; multiple or overlapping speakers require manual correction'),
@@ -57,6 +59,8 @@ async function action(work: () => Promise<void>) {
 async function submit() {
   if (!file.value) return
   await action(async () => {
+    if (file.value!.size > 128 * 1024 * 1024) throw new Error(t('文件不能超过 128 MiB。', 'Files cannot exceed 128 MiB.'))
+    if (file.value!.size > 25 * 1024 * 1024 && !localOnly.value) throw new Error(t('超过 25 MiB 的录音请先启用仅本地处理。', 'Enable local-only processing for audio above 25 MiB.'))
     let terms = {}
     if (terminology.value.trim()) {
       terms = JSON.parse(terminology.value)
@@ -106,7 +110,7 @@ onUnmounted(() => { stopped = true; clearTimeout(timer) })
 
 <template>
   <section class="media-page">
-    <header><h1>{{ t('音视频转写', 'Media Transcription') }}</h1><p class="subtle">{{ t('上传音频或视频音轨，转写、校对后保存到知识库。单个文件最多 25 MiB。', 'Upload audio or a video soundtrack, transcribe and correct it, then save it to the knowledge base. Maximum file size: 25 MiB.') }}</p></header>
+    <header><h1>{{ t('音视频转写', 'Media Transcription') }}</h1><p class="subtle">{{ t('上传音频或视频音轨，转写、校对后保存到知识库。最多 128 MiB；超过 25 MiB 请启用仅本地处理。音轨最长 1 小时。', 'Upload audio or a video soundtrack, transcribe and correct it, then save it to the knowledge base. Up to 128 MiB; enable local-only processing above 25 MiB. Audio duration is limited to one hour.') }}</p></header>
     <div v-if="error" class="error-banner" role="alert">{{ error }}</div><p v-if="notice" role="status">{{ notice }}</p>
     <form class="panel upload" @submit.prevent="submit">
       <FilePicker :file="file" :label="t('选择附件', 'Choose attachment')" :empty-label="t('尚未选择文件', 'No file selected')" accept=".wav,.mp3,.flac,.ogg,.m4a,.mp4,.webm,.txt,.md" @select="file = $event" />
diff --git a/frontend/src/features/settings/SettingsView.spec.ts b/frontend/src/features/settings/SettingsView.spec.ts
new file mode 100644
index 0000000..b1077b9
--- /dev/null
+++ b/frontend/src/features/settings/SettingsView.spec.ts
@@ -0,0 +1,38 @@
+// @vitest-environment happy-dom
+import { beforeEach, expect, it, vi } from 'vitest'
+import { flushPromises, mount } from '@vue/test-utils'
+import { createPinia, setActivePinia } from 'pinia'
+import SettingsView from './SettingsView.vue'
+import { useProviderStore } from '@/stores/provider'
+import { useSettingsStore } from '@/stores/settings'
+
+beforeEach(() => { localStorage.clear(); setActivePinia(createPinia()) })
+it('shows provider status and enables testing only after a successful enable', async () => {
+  const store = useProviderStore()
+  store.providers = [{ provider_id: 'p1', name: 'Example', provider_type: 'openai_compatible', enabled: false, default_model: '', capabilities: {}, has_credential: false }]
+  vi.spyOn(store, 'loadProviders').mockResolvedValue()
+  vi.spyOn(store, 'loadPresets').mockResolvedValue()
+  vi.spyOn(store, 'refreshEnabledModels').mockResolvedValue()
+  vi.spyOn(useSettingsStore(), 'loadDiagnostics').mockResolvedValue()
+  const update = vi.spyOn(store, 'updateProvider').mockImplementation(async (_id, data) => {
+    store.providers[0] = { ...store.providers[0]!, ...data }
+    return store.providers[0]!
+  })
+  const wrapper = mount(SettingsView, { global: { stubs: { UsageCard: true, LocalModelSettings: true, ModelRoutingSettings: true, ProviderLogo: true } } })
+  await flushPromises()
+  await wrapper.findAll('button').find(button => button.text() === '模型提供商')!.trigger('click')
+  expect(wrapper.text()).toContain('已停用')
+  const test = () => wrapper.findAll('button').find(button => button.text() === '测试')!
+  expect(test().attributes('disabled')).toBeDefined()
+  await wrapper.findAll('button').find(button => button.text() === '启用')!.trigger('click')
+  await flushPromises()
+  expect(update).toHaveBeenCalledWith('p1', { enabled: true })
+  expect(wrapper.text()).toContain('已启用')
+  expect(test().attributes('disabled')).toBeUndefined()
+  update.mockRejectedValueOnce(new Error('保存失败'))
+  await wrapper.findAll('button').find(button => button.text() === '停用')!.trigger('click')
+  await flushPromises()
+  expect(wrapper.text()).toContain('已启用')
+  expect(wrapper.text()).toContain('保存失败')
+  wrapper.unmount()
+})
diff --git a/frontend/src/features/settings/SettingsView.vue b/frontend/src/features/settings/SettingsView.vue
index b40d990..521a005 100644
--- a/frontend/src/features/settings/SettingsView.vue
+++ b/frontend/src/features/settings/SettingsView.vue
@@ -24,6 +24,18 @@ const showProviderForm = ref(false)
 const editingProvider = ref<ProviderConfig>()
 const providerAction = ref('')
 const testResults = ref<Record<string, string>>({})
+const providerBusy = ref<Record<string, boolean>>({})
+async function toggleProvider(provider: ProviderConfig) {
+  if (providerBusy.value[provider.provider_id]) return
+  providerBusy.value[provider.provider_id] = true
+  providerAction.value = ''
+  try {
+    await providerStore.updateProvider(provider.provider_id, { enabled: !provider.enabled })
+    delete testResults.value[provider.provider_id]
+  } catch (error) {
+    providerAction.value = error instanceof Error ? error.message : t('启停失败，请重试。', 'Could not change provider status. Please retry.')
+  } finally { providerBusy.value[provider.provider_id] = false }
+}
 onMounted(async () => {
   await Promise.all([providerStore.loadProviders(), providerStore.loadPresets(), settingsStore.loadDiagnostics()])
   await providerStore.refreshEnabledModels()
@@ -40,7 +52,7 @@ function openProvider(provider?: ProviderConfig) {
   editingProvider.value = provider
   providerAction.value = ''
   showProviderForm.value = true
-  if (provider) void providerStore.loadModels(provider.provider_id).catch(() => undefined)
+  if (provider?.enabled) void providerStore.loadModels(provider.provider_id).catch(() => undefined)
 }
 
 async function providerSaved(provider: ProviderConfig) {
@@ -68,18 +80,17 @@ async function chooseDefaultModel(provider: ProviderConfig, event: Event) {
     <div v-else-if="activeSection === 'editor'" class="panel settings-section"><h2>{{ t('编辑器', 'Editor') }}</h2><div class="setting-row"><span><strong>{{ t('默认模式', 'Default mode') }}</strong><small>{{ t('新打开文件使用的编辑器模式', 'Editor mode used for newly opened files') }}</small></span><select v-model="settingsStore.defaultEditorMode" class="select short"><option value="wysiwyg">{{ t('写作与预览', 'Writing and preview') }}</option><option value="source">{{ t('Markdown 源码', 'Markdown source') }}</option></select></div><div class="setting-row"><span><strong>{{ t('字号', 'Font size') }}</strong></span><input v-model.number="themeStore.fontEditorSize" class="input short" type="number" min="12" max="32" /></div><div class="setting-row"><span><strong>{{ t('行高', 'Line height') }}</strong></span><input v-model.number="themeStore.lineHeight" class="input short" type="number" min="1.2" max="2.4" step="0.1" /></div><div class="setting-row"><span><strong>{{ t('行宽', 'Line width') }}</strong><small>{{ t('Markdown 预览最大字符宽度', 'Maximum character width for Markdown preview') }}</small></span><input v-model.number="settingsStore.editorLineWidth" class="input short" type="number" min="40" max="140" /></div><label class="setting-row"><span><strong>{{ t('拼写检查', 'Spell check') }}</strong><small>{{ t('在写作与源码编辑器中使用系统拼写检查', 'Use system spell checking in visual and source editors') }}</small></span><input v-model="settingsStore.spellCheck" type="checkbox" /></label></div>
 
     <div v-else-if="activeSection === 'providers'" class="settings-section">
+      <section class="panel provider-settings-card">
       <div class="section-head">
         <div><h2>{{ t('模型提供商', 'Model Providers') }}</h2><p class="subtle">{{ t('选择国内外提供商预设，或配置自定义 API 与独立密钥。', 'Choose a provider preset or configure a custom API with separate credentials.') }}</p></div>
         <button class="button-primary" @click="openProvider()">{{ t('新增 Provider', 'Add Provider') }}</button>
       </div>
       <div v-if="providerStore.error || providerAction" class="error-banner">{{ providerStore.error || providerAction }}</div>
-      <LocalModelSettings />
-      <UsageCard />
       <p v-if="!providerStore.providers.length" class="subtle">{{ providerStore.isLoading ? t('正在加载提供商…', 'Loading providers…') : t('尚无可用提供商，请添加真实 API 或本地 Ollama 配置。', 'No providers are available. Add a real API or local Ollama configuration.') }}</p>
       <div class="provider-list">
         <article v-for="provider in providerStore.providers" :key="provider.provider_id" class="item-card provider-card">
           <div class="provider-main">
-            <div class="inline-actions"><ProviderLogo :logo-id="providerStore.presets.find(preset => preset.preset_id === presetIdFor(provider))?.logo_id || presetIdFor(provider)" /><strong>{{ provider.name }}</strong><span class="badge" :class="{ success: provider.enabled }">{{ provider.provider_type }}</span></div>
+            <div class="inline-actions"><ProviderLogo :logo-id="providerStore.presets.find(preset => preset.preset_id === presetIdFor(provider))?.logo_id || presetIdFor(provider)" /><strong>{{ provider.name }}</strong><span class="badge">{{ provider.provider_type }}</span><span class="badge" :class="{ success: provider.enabled }">{{ provider.enabled ? t('已启用', 'Enabled') : t('已停用', 'Disabled') }}</span></div>
             <p class="subtle">{{ provider.base_url || t('本地内置', 'Built in locally') }} · {{ t('默认模型', 'Default model') }} {{ provider.default_model || t('未设置', 'Not set') }}</p>
             <div class="tag-list"><span v-for="(_, capability) in provider.capabilities" :key="capability" class="badge">{{ capability }}</span></div>
             <div v-if="providerStore.modelsByProvider[provider.provider_id]?.length" class="model-picker">
@@ -94,13 +105,17 @@ async function chooseDefaultModel(provider: ProviderConfig, event: Event) {
             <p v-if="testResults[provider.provider_id]" class="test-result">{{ testResults[provider.provider_id] }}</p>
           </div>
           <div class="inline-actions provider-actions">
-            <button class="button-secondary" :disabled="providerStore.modelLoadingByProvider[provider.provider_id]" @click="refreshModels(provider)">{{ providerStore.modelLoadingByProvider[provider.provider_id] ? t('获取中…', 'Loading…') : t('刷新模型', 'Refresh models') }}</button>
-            <button class="button-secondary" @click="testProvider(provider)">{{ t('测试', 'Test') }}</button>
+            <button class="button-secondary" :disabled="providerBusy[provider.provider_id]" :aria-pressed="provider.enabled" @click="toggleProvider(provider)">{{ providerBusy[provider.provider_id] ? t('保存中…', 'Saving…') : provider.enabled ? t('停用', 'Disable') : t('启用', 'Enable') }}</button>
+            <button class="button-secondary" :disabled="!provider.enabled || providerBusy[provider.provider_id] || providerStore.modelLoadingByProvider[provider.provider_id]" @click="refreshModels(provider)">{{ providerStore.modelLoadingByProvider[provider.provider_id] ? t('获取中…', 'Loading…') : t('刷新模型', 'Refresh models') }}</button>
+            <button class="button-secondary" :disabled="!provider.enabled || providerBusy[provider.provider_id]" @click="testProvider(provider)">{{ t('测试', 'Test') }}</button>
             <button class="button-secondary" @click="openProvider(provider)">{{ t('编辑', 'Edit') }}</button>
             <button class="button-danger" @click="removeProvider(provider)">{{ t('删除', 'Delete') }}</button>
           </div>
         </article>
       </div>
+      </section>
+      <LocalModelSettings class="panel local-settings-card" />
+      <UsageCard />
     </div>
 
     <div v-else-if="activeSection === 'index'" class="panel settings-section"><h2>{{ t('索引与模型', 'Index and Models') }}</h2><div class="index-summary"><div><span class="badge" :class="{ success: settingsStore.indexStatus.status === 'idle', error: settingsStore.indexStatus.status === 'error' }">{{ settingsStore.indexStatus.status }}</span><p>{{ t('待处理任务', 'Pending jobs') }} {{ settingsStore.indexStatus.pending_jobs }}</p></div><div><strong>{{ settingsStore.indexStatus.total_notes ?? t('未获取', 'Unavailable') }}</strong><small>{{ t('笔记', 'Notes') }}</small></div><div><strong>{{ settingsStore.indexStatus.total_blocks ?? t('未获取', 'Unavailable') }}</strong><small>Block</small></div></div><div v-if="settingsStore.indexStatus.error" class="error-banner">{{ settingsStore.indexStatus.error }}</div><div class="inline-actions"><button class="button-primary" @click="settingsStore.rebuildIndex('full')">{{ t('重建全部', 'Rebuild all') }}</button><span class="subtle">{{ t('当前后端支持全量重建。', 'The current backend supports a full rebuild.') }}</span></div><ModelRoutingSettings /></div>
@@ -116,6 +131,9 @@ async function chooseDefaultModel(provider: ProviderConfig, event: Event) {
 <style scoped>
 .settings-page { max-width: 1120px; margin: 0 auto; }
 .settings-section { display: grid; gap: var(--space-md); }
+.provider-settings-card, .local-settings-card { padding: 20px; min-width: 0; }
+.provider-settings-card { display: grid; gap: var(--space-md); }
+.provider-settings-card .section-head { margin-bottom: 0; gap: var(--space-md); flex-wrap: wrap; }
 .settings-section h2 { margin-bottom: var(--space-sm); }
 .setting-row { display: flex; align-items: center; justify-content: space-between; gap: var(--space-xl); min-height: 58px; padding: var(--space-sm) var(--space-md); border-bottom: 1px solid var(--color-border-subtle); border-radius: var(--radius-md); transition: background-color var(--motion-fast); }
 .setting-row:hover { background: var(--color-background-secondary); }
diff --git a/frontend/src/features/settings/UsageCard.vue b/frontend/src/features/settings/UsageCard.vue
index 281a65f..46efb94 100644
--- a/frontend/src/features/settings/UsageCard.vue
+++ b/frontend/src/features/settings/UsageCard.vue
@@ -1,8 +1,12 @@
 <script setup lang="ts">
-import { computed, onMounted, ref } from 'vue'
+import { computed, onMounted, ref, type Component } from 'vue'
+import UsageChart from './UsageChart.vue'
+import type { UsageBucket } from './UsageChart.vue'
+import AppIcon from '@/components/common/AppIcon.vue'
+import { DataAnalysis, Download, Upload, Coin, CircleCheck, CircleClose, FolderAdd, Cpu, PieChart, Microphone, Refresh } from '@element-plus/icons-vue'
 import { apiClient } from '@/services/apiClient'
 import { t } from '@/i18n'
-interface Usage {audio_request_count:number;audio_seconds:number|null;audio_covered_requests:number;totals: Record<string,number|null>;coverage:Record<string,number>;request_count:number;complete_requests:number;cache_hit_rate:number|null;cache_covered_requests:number;options:{provider_id:string;model:string;source:string}[]}
+interface Usage {series?:UsageBucket[];audio_request_count:number;audio_seconds:number|null;audio_covered_requests:number;totals: Record<string,number|null>;coverage:Record<string,number>;request_count:number;complete_requests:number;cache_hit_rate:number|null;cache_covered_requests:number;options:{provider_id:string;model:string;source:string}[]}
 const data = ref<Usage | null>(null)
 const period = ref('7')
 const provider = ref('')
@@ -12,23 +16,31 @@ const start = ref('')
 const end = ref('')
 const busy = ref(false)
 const error = ref('')
+let generation = 0
 const metrics = computed<Record<string,string>>(() => ({input_tokens:t('输入 Token','Input tokens'),output_tokens:t('输出 Token','Output tokens'),total_tokens:t('总 Token','Total tokens'),cache_hit_tokens:t('缓存命中','Cache hits'),cache_miss_tokens:t('缓存未命中','Cache misses'),cache_write_tokens:t('缓存写入','Cache writes'),reasoning_tokens:t('推理 Token','Reasoning tokens')}))
+const metricIcons: Record<string, Component> = {
+  input_tokens: Download, output_tokens: Upload, total_tokens: Coin,
+  cache_hit_tokens: CircleCheck, cache_miss_tokens: CircleClose,
+  cache_write_tokens: FolderAdd, reasoning_tokens: Cpu,
+}
 async function load() {
+  const current = ++generation
   busy.value = true; error.value = ''
   try {
     const until = period.value === 'custom' ? new Date(end.value) : new Date()
     const from = period.value === 'custom' ? new Date(start.value) : new Date(until)
     if (period.value === 'today') from.setHours(0,0,0,0)
-    else if (period.value !== 'custom') from.setDate(from.getDate() - Number(period.value))
+    else if (period.value !== 'custom') { from.setDate(from.getDate() - Number(period.value) + 1); from.setHours(0,0,0,0) }
     if (!Number.isFinite(from.getTime()) || !Number.isFinite(until.getTime()) || until <= from) throw new Error(t('请选择有效的开始与结束时间。', 'Choose a valid start and end time.'))
-    data.value = await apiClient.get<Usage>('/api/usage', {params: {start:from.toISOString(),end:until.toISOString(),provider_id:provider.value || undefined,model:model.value || undefined,source:source.value || undefined}})
-  } catch(e) { error.value = (e as Error).message } finally { busy.value = false }
+    const result = await apiClient.get<Usage>('/api/usage', {params: {timezone_offset: -new Date().getTimezoneOffset(), start:from.toISOString(),end:until.toISOString(),provider_id:provider.value || undefined,model:model.value || undefined,source:source.value || undefined}})
+    if (current === generation) data.value = result
+  } catch(e) { if (current === generation) { error.value = (e as Error).message; data.value = null } } finally { if (current === generation) busy.value = false }
 }
 onMounted(load)
 </script>
 <template>
-  <section class="panel usage-card"><header><h3>{{ t('Token 消耗情况', 'Token Usage') }}</h3><button class="button-secondary" :disabled="busy" @click="load">{{ busy ? t('加载中…', 'Loading…') : t('刷新统计', 'Refresh') }}</button></header>
-    <div class="filters"><label>{{ t('时间', 'Period') }}<select v-model="period" class="select" @change="period !== 'custom' && load()"><option value="today">{{ t('今日', 'Today') }}</option><option value="7">{{ t('近 7 天', 'Last 7 days') }}</option><option value="30">{{ t('近 30 天', 'Last 30 days') }}</option><option value="custom">{{ t('自定义', 'Custom') }}</option></select></label>
+  <section class="panel usage-card"><header><h3><AppIcon :icon="DataAnalysis" :size="20" />{{ t('Token 消耗情况', 'Token Usage') }}</h3><button class="button-secondary" :disabled="busy" @click="load"><AppIcon :icon="Refresh" :size="16" />{{ busy ? t('加载中…', 'Loading…') : t('刷新统计', 'Refresh') }}</button></header>
+    <div class="filters"><label>{{ t('时间', 'Period') }}<select v-model="period" class="select" @change="period !== 'custom' && load()"><option value="today">{{ t('今日', 'Today') }}</option><option value="7">{{ t('近 7 天', 'Last 7 days') }}</option><option value="30">{{ t('近 30 天', 'Last 30 days') }}</option><option value="90">{{ t('近三个月（90 天）', 'Last 3 months (90 days)') }}</option><option value="custom">{{ t('自定义', 'Custom') }}</option></select></label>
       <label>{{ t('提供商', 'Provider') }}<select v-model="provider" class="select" @change="model = ''; load()"><option value="">{{ t('全部', 'All') }}</option><option v-for="id in [...new Set(data?.options.map(o => o.provider_id) || [])]" :key="id">{{ id }}</option></select></label>
       <label>{{ t('模型', 'Model') }}<select v-model="model" class="select" @change="load"><option value="">{{ t('全部', 'All') }}</option><option v-for="id in [...new Set(data?.options.filter(o => !provider || o.provider_id === provider).map(o => o.model) || [])]" :key="id">{{ id }}</option></select></label>
       <label>{{ t('来源', 'Source') }}<select v-model="source" class="select" @change="load"><option value="">{{ t('全部', 'All') }}</option><option value="api">{{ t('远程 API', 'Remote API') }}</option><option value="local">{{ t('本地服务', 'Local service') }}</option></select></label>
@@ -36,11 +48,16 @@ onMounted(load)
     <div v-if="period === 'custom'" class="filters"><label>{{ t('开始', 'Start') }}<input v-model="start" class="input" type="datetime-local" /></label><label>{{ t('结束', 'End') }}<input v-model="end" class="input" type="datetime-local" /></label><button class="button-secondary" @click="load">{{ t('应用时间段', 'Apply period') }}</button></div>
     <p v-if="error" class="error-banner" role="alert">{{ error }}</p>
     <template v-if="data"><p v-if="!data.request_count" class="subtle">{{ t('该时间段没有已记录的模型请求。', 'No model requests were recorded during this period.') }}</p>
-      <div class="usage-grid"><div v-for="(label,key) in metrics" :key="key"><small>{{ label }}</small><strong>{{ data.totals[key] === null ? t('未提供', 'Unavailable') : data.totals[key]?.toLocaleString() }}</strong><small>{{ t('覆盖', 'Coverage') }} {{ data.coverage[key] }} / {{ data.request_count }} {{ t('次', 'requests') }}</small></div>
-      <div><small>{{ t('缓存命中率', 'Cache hit rate') }}</small><strong>{{ data.cache_hit_rate === null ? t('未提供', 'Unavailable') : `${(data.cache_hit_rate * 100).toFixed(1)}%` }}</strong><small>{{ t('覆盖', 'Coverage') }} {{ data.cache_covered_requests }}</small></div></div>
-      <p class="subtle">{{ t('音频调用', 'Audio calls') }} {{ data.audio_request_count ?? 0 }} · {{ t('时长', 'Duration') }} {{ data.audio_seconds == null ? t('未提供', 'Unavailable') : `${data.audio_seconds.toFixed(2)} ${t('秒', 'sec')}` }} ({{ t('覆盖', 'coverage') }} {{ data.audio_covered_requests ?? 0 }}; {{ t('重试分别计数', 'retries counted separately') }})</p>
+      <UsageChart v-if="data.series" :buckets="data.series" />
+      <div class="usage-grid"><div v-for="(label,key) in metrics" :key="key"><small class="metric-label"><span class="metric-icon"><AppIcon :icon="metricIcons[key]!" :size="18" /></span>{{ label }}</small><strong>{{ data.totals[key] === null ? t('未提供', 'Unavailable') : data.totals[key]?.toLocaleString() }}</strong><small>{{ t('覆盖', 'Coverage') }} {{ data.coverage[key] }} / {{ data.request_count }} {{ t('次', 'requests') }}</small></div>
+      <div><small class="metric-label"><span class="metric-icon"><AppIcon :icon="PieChart" :size="18" /></span>{{ t('缓存命中率', 'Cache hit rate') }}</small><strong>{{ data.cache_hit_rate === null ? t('未提供', 'Unavailable') : `${(data.cache_hit_rate * 100).toFixed(1)}%` }}</strong><small>{{ t('覆盖', 'Coverage') }} {{ data.cache_covered_requests }}</small></div></div>
+      <p class="subtle audio-usage"><AppIcon :icon="Microphone" :size="16" />{{ t('音频调用', 'Audio calls') }} {{ data.audio_request_count ?? 0 }} · {{ t('时长', 'Duration') }} {{ data.audio_seconds == null ? t('未提供', 'Unavailable') : `${data.audio_seconds.toFixed(2)} ${t('秒', 'sec')}` }} ({{ t('覆盖', 'coverage') }} {{ data.audio_covered_requests ?? 0 }}; {{ t('重试分别计数', 'retries counted separately') }})</p>
       <p class="subtle">{{ t('请求', 'Requests') }} {{ data.request_count }}, {{ t('其中完整结束', 'completed') }} {{ data.complete_requests }}. {{ t('输入总量包含厂商已报告的缓存，推理 Token 不重复加入输出。', 'Input totals include provider-reported cache tokens; reasoning tokens are not added to output twice.') }}</p>
     </template><p class="subtle">{{ t('统计为本应用观测值，不是厂商账户账单。缺失指标显示“未提供”，历史未记录的数据不补估。', 'Statistics are application observations, not provider billing. Missing metrics stay unavailable and historical gaps are not estimated.') }}</p>
   </section>
 </template>
-<style scoped>.usage-card{display:grid;gap:16px;padding:20px}.usage-card header,.filters{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.usage-card header{justify-content:space-between}.filters label{display:grid;gap:5px}.usage-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:16px}.usage-grid>div{display:grid;gap:8px}.usage-grid strong{font-size:22px}</style>
+<style scoped>
+.usage-card h3, .usage-card header button, .metric-label, .audio-usage { display: flex; align-items: center; gap: 8px; }
+.usage-card h3 > .app-icon, .audio-usage > .app-icon { color: var(--color-accent-primary); }
+.metric-icon { display: inline-flex; align-items: center; justify-content: center; width: 30px; height: 30px; border-radius: var(--radius-sm); background: var(--color-background-secondary); color: var(--color-accent-primary); flex-shrink: 0; }
+.usage-card{display:grid;gap:16px;padding:20px}.usage-card header,.filters{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.usage-card header{justify-content:space-between}.filters label{display:grid;gap:5px}.usage-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:16px}.usage-grid>div{display:grid;gap:8px}.usage-grid strong{font-size:22px}</style>
diff --git a/frontend/src/features/settings/UsageChart.spec.ts b/frontend/src/features/settings/UsageChart.spec.ts
new file mode 100644
index 0000000..aa33584
--- /dev/null
+++ b/frontend/src/features/settings/UsageChart.spec.ts
@@ -0,0 +1,17 @@
+// @vitest-environment happy-dom
+import { mount } from '@vue/test-utils'
+import { expect, it } from 'vitest'
+import UsageChart from './UsageChart.vue'
+it('distinguishes unreported tokens from zero and switches to request counts', async () => {
+  const wrapper = mount(UsageChart, { props: { buckets: [{ date: '2026-09-05', end_date: '2026-09-05',
+    local: { requests: 1, totals: { input_tokens: null }, coverage: { input_tokens: 0 } },
+    api: { requests: 2, totals: { input_tokens: 0 }, coverage: { input_tokens: 1 } },
+  }] } })
+  expect(wrapper.findAll('.usage-bar.missing')).toHaveLength(1)
+  expect(wrapper.get('.usage-bar.local').attributes('aria-label')).toContain('未提供')
+  expect(wrapper.get('.usage-bar.api').attributes('aria-label')).toContain('覆盖 1/2')
+  await wrapper.get('select').setValue('requests')
+  expect(wrapper.findAll('.usage-bar.missing')).toHaveLength(0)
+  expect(wrapper.get('.usage-bar.api').attributes('style')).toContain('160px')
+  wrapper.unmount()
+})
diff --git a/frontend/src/features/settings/UsageChart.vue b/frontend/src/features/settings/UsageChart.vue
new file mode 100644
index 0000000..6df515c
--- /dev/null
+++ b/frontend/src/features/settings/UsageChart.vue
@@ -0,0 +1,71 @@
+<script setup lang="ts">
+import { computed, ref } from 'vue'
+import { Cpu, Connection } from '@element-plus/icons-vue'
+import AppIcon from '@/components/common/AppIcon.vue'
+import { t } from '@/i18n'
+export interface UsageBucket {
+  date: string
+  end_date: string
+  local: { requests: number; totals: Record<string, number | null>; coverage: Record<string, number> }
+  api: { requests: number; totals: Record<string, number | null>; coverage: Record<string, number> }
+}
+const props = defineProps<{ buckets: UsageBucket[] }>()
+const metric = ref('input_tokens')
+const sources = ['local', 'api'] as const
+const labels = computed(() => ({ local: t('本地模型', 'Local models'), api: t('模型提供商', 'Providers') }))
+const metricLabel = computed(() => metric.value === 'requests' ? t('请求次数', 'Requests') : metric.value === 'input_tokens' ? t('输入 Token', 'Input tokens') : metric.value === 'output_tokens' ? t('输出 Token', 'Output tokens') : t('总 Token', 'Total tokens'))
+function value(bucket: UsageBucket, source: 'local' | 'api') {
+  const item = bucket[source]
+  return metric.value === 'requests' ? item.requests : item.requests === 0 ? 0 : item.totals[metric.value] ?? null
+}
+function description(bucket: UsageBucket, source: 'local' | 'api') {
+  const count = value(bucket, source)
+  const coverage = metric.value === 'requests' ? '' : ` · ${t('覆盖', 'Coverage')} ${bucket[source].coverage[metric.value] ?? 0}/${bucket[source].requests}`
+  return `${bucket.date}${bucket.end_date !== bucket.date ? ' – ' + bucket.end_date : ''} · ${labels.value[source]} · ${metricLabel.value}: ${count === null ? t('未提供', 'Unavailable') : count.toLocaleString()}${coverage}`
+}
+const maximum = computed(() => Math.max(1, ...props.buckets.flatMap(bucket => sources.map(source => value(bucket, source) ?? 0))))
+</script>
+
+<template>
+  <section class="usage-chart" :aria-label="t('使用趋势', 'Usage trend')">
+    <div class="chart-toolbar">
+      <h4>{{ t('使用趋势', 'Usage trend') }}</h4>
+      <select v-model="metric" class="select" :aria-label="t('图表统计指标', 'Chart metric')">
+        <option value="input_tokens">{{ t('输入 Token', 'Input tokens') }}</option>
+        <option value="output_tokens">{{ t('输出 Token', 'Output tokens') }}</option>
+        <option value="total_tokens">{{ t('总 Token', 'Total tokens') }}</option>
+        <option value="requests">{{ t('请求次数', 'Requests') }}</option>
+      </select>
+      <div class="chart-legend"><span class="local"><AppIcon :icon="Cpu" :size="16" />{{ labels.local }} · {{ t('实色', 'Solid') }}</span><span class="api"><AppIcon :icon="Connection" :size="16" />{{ labels.api }} · {{ t('斜纹', 'Striped') }}</span></div>
+    </div>
+    <p class="subtle chart-scale">{{ metricLabel }} · 0 — {{ maximum.toLocaleString() }}</p>
+    <div class="chart-scroll" tabindex="0" :aria-label="t('按日期横向滚动查看柱状图', 'Scroll the chart by date')">
+      <div class="chart-columns" :style="{ minWidth: `${buckets.length * 48}px` }">
+        <div v-for="bucket in buckets" :key="bucket.date" class="chart-column">
+          <div class="chart-bars">
+            <div v-for="source in sources" :key="source" class="usage-bar" :class="[source, { missing: value(bucket, source) === null }]"
+              :style="{ height: value(bucket, source) === null ? '8px' : `${(value(bucket, source) ?? 0) / maximum * 160}px` }"
+              role="img" :aria-label="description(bucket, source)" :title="description(bucket, source)" />
+          </div>
+          <small :title="`${bucket.date} – ${bucket.end_date}`">{{ bucket.date.slice(5) }}</small>
+        </div>
+      </div>
+    </div>
+    <p class="subtle">{{ t('按本机时区分组；柱高仅汇总已报告值，悬停可查看覆盖请求数。虚线表示有请求但未提供该指标，不作为零消耗。', 'Grouped by your local UTC offset. Bars sum reported values; hover for coverage. Dashed markers mean requests with unavailable counters, not zero usage.') }}</p>
+    <details><summary>{{ t('查看图表数据', 'View chart data') }}</summary><div class="chart-scroll"><table><thead><tr><th>{{ t('日期', 'Date') }}</th><th>{{ labels.local }}</th><th>{{ labels.api }}</th></tr></thead><tbody><tr v-for="bucket in buckets" :key="bucket.date"><th>{{ bucket.date }}<template v-if="bucket.date !== bucket.end_date"> – {{ bucket.end_date }}</template></th><td v-for="source in sources" :key="source">{{ description(bucket, source) }}</td></tr></tbody></table></div></details>
+  </section>
+</template>
+
+<style scoped>
+.usage-chart { min-width: 0; padding: 16px; border: 1px solid var(--color-border-subtle); border-radius: var(--radius-md); background: var(--color-background-primary); }
+.chart-toolbar, .chart-legend, .chart-legend span { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
+.chart-toolbar { justify-content: space-between; }.chart-toolbar .select { width: auto; }.chart-legend { font-size: 12px; }
+.local { color: var(--color-info); }.api { color: var(--color-accent-primary); }
+.chart-scale { margin: 12px 0 0; font-size: 12px; }.chart-scroll { overflow-x: auto; padding-bottom: 8px; }.chart-columns { display: flex; gap: 8px; }
+.chart-column { flex: 1; min-width: 40px; text-align: center; }.chart-column small { font-size: 11px; color: var(--color-text-secondary); white-space: nowrap; }
+.chart-bars { height: 176px; display: flex; align-items: flex-end; justify-content: center; gap: 4px; border-bottom: 1px solid var(--color-border-default); background: repeating-linear-gradient(to top, transparent 0 39px, var(--color-border-subtle) 39px 40px); }
+.usage-bar { width: 14px; max-width: 35%; background: currentColor; border-radius: 3px 3px 0 0; }.usage-bar.api { background: repeating-linear-gradient(45deg, currentColor 0 4px, color-mix(in srgb, currentColor 45%, var(--color-surface-primary)) 4px 7px); }
+.usage-bar.missing { background: transparent; border: 1px dashed currentColor; box-sizing: border-box; }
+.usage-chart > p:last-of-type { font-size: 12px; margin: 12px 0; }.usage-chart summary { cursor: pointer; color: var(--color-text-link); font-size: 12px; }
+table { width: 100%; border-collapse: collapse; font-size: 12px; }th, td { padding: 8px; text-align: left; border-bottom: 1px solid var(--color-border-subtle); }
+</style>
diff --git a/frontend/src/features/themes/CommunityThemePreview.vue b/frontend/src/features/themes/CommunityThemePreview.vue
index f643ecf..c8af27b 100644
--- a/frontend/src/features/themes/CommunityThemePreview.vue
+++ b/frontend/src/features/themes/CommunityThemePreview.vue
@@ -4,16 +4,20 @@ import { t } from '@/i18n'
 import { getCommunityThemePreviewCss, mockCommunityThemes } from '@/services/themePackageService'
 import tokensCss from '@/styles/tokens.css?raw'
 
-const props = defineProps<{ themeId: string }>()
+const props = defineProps<{ themeId: string; name?: string; css?: string }>()
 const emit = defineEmits<{ (event: 'close'): void }>()
-const theme = computed(() => mockCommunityThemes.find(item => item.theme_id === props.themeId))
+const theme = computed(() => props.name ? { name: props.name } : mockCommunityThemes.find(item => item.theme_id === props.themeId))
 const previewDocument = computed(() => {
-  // Only bundled community CSS enters this script-free, isolated document.
+  // Both imported and bundled CSS are previewed in a script-free isolated document.
   // Previewing never installs a theme or changes application styles/storage.
   const doc = document.implementation.createHTMLDocument(theme.value?.name ?? '')
   doc.documentElement.dataset.theme = props.themeId
+  const policy = doc.createElement('meta')
+  policy.httpEquiv = 'Content-Security-Policy'
+  policy.content = "default-src 'none'; style-src 'unsafe-inline'; img-src data:; font-src data:; base-uri 'none'; form-action 'none'"
+  doc.head.append(policy)
   const style = doc.createElement('style')
-  style.textContent = `${tokensCss}\n${getCommunityThemePreviewCss(props.themeId)}\nbody { margin:0; padding:24px; background:var(--color-background-primary); color:var(--color-text-primary); font:16px/1.6 system-ui; } article { padding:20px; border:1px solid var(--color-border-default); border-radius:8px; background:var(--color-surface-primary); } p { color:var(--color-text-secondary); } button { padding:8px 16px; border:0; border-radius:6px; background:var(--color-accent-primary); color:white; }`
+  style.textContent = `${tokensCss}\n${props.css ?? getCommunityThemePreviewCss(props.themeId)}\nbody { margin:0; padding:24px; background:var(--color-background-primary); color:var(--color-text-primary); font:16px/1.6 system-ui; } article { padding:20px; border:1px solid var(--color-border-default); border-radius:8px; background:var(--color-surface-primary); } p { color:var(--color-text-secondary); } button { padding:8px 16px; border:0; border-radius:6px; background:var(--color-accent-primary); color:white; }`
   doc.head.append(style)
   const article = doc.createElement('article')
   article.className = 'panel'
diff --git a/frontend/src/features/themes/ThemesView.spec.ts b/frontend/src/features/themes/ThemesView.spec.ts
index 9ad8e1b..76c2b19 100644
--- a/frontend/src/features/themes/ThemesView.spec.ts
+++ b/frontend/src/features/themes/ThemesView.spec.ts
@@ -21,6 +21,12 @@ it('downloads a URL for inspection without automatically installing it', async (
   await vi.waitFor(() => expect(useThemeStore().pendingInspection?.compatible).toBe(true))
   expect(useThemeStore().isThemeInstalled('paper-moments')).toBe(false)
   expect(wrapper.get('.inspection-result').text()).toContain('纸间时光')
+  await wrapper.findAll('button').find(button => button.text() === '预览主题效果')!.trigger('click')
+  const preview = wrapper.get('iframe')
+  expect(preview.attributes('sandbox')).toBe('')
+  expect(preview.attributes('srcdoc')).toContain('Content-Security-Policy')
+  expect(preview.attributes('srcdoc')).toContain('data-theme="paper-moments"')
+  expect(useThemeStore().isThemeInstalled('paper-moments')).toBe(false)
 })
 
 it('ignores a URL response after the dialog is cancelled', async () => {
diff --git a/frontend/src/features/themes/ThemesView.vue b/frontend/src/features/themes/ThemesView.vue
index 5f60437..7685bf6 100644
--- a/frontend/src/features/themes/ThemesView.vue
+++ b/frontend/src/features/themes/ThemesView.vue
@@ -9,6 +9,7 @@ import CommunityThemePreview from './CommunityThemePreview.vue'
 import paperMomentsUrl from '@/assets/themes/paper-moments.theme?url'
 
 const themeStore = useThemeStore()
+const previewImport = ref(false)
 
 const activeTab = ref<'installed' | 'community'>('installed')
 const showImportDialog = ref(false)
@@ -22,6 +23,7 @@ let importGeneration = 0
 let downloadController: AbortController | undefined
 
 function resetImport() {
+  previewImport.value = false
   importGeneration++
   downloadController?.abort()
   importing.value = false
@@ -253,6 +255,7 @@ onMounted(() => {
             <summary>将要安装的 CSS（{{ themeStore.pendingInspection.css.length }} 字符）</summary>
             <pre>{{ themeStore.pendingInspection.css }}</pre>
           </details>
+          <button type="button" class="button-secondary" @click="previewImport = true">预览主题效果</button>
         </div>
 
         <div v-else class="upload-area">
@@ -280,6 +283,7 @@ onMounted(() => {
       </div>
     </div>
   </section>
+  <CommunityThemePreview v-if="previewImport && themeStore.pendingInspection?.compatible" :theme-id="themeStore.pendingInspection.manifest.theme_id" :name="themeStore.pendingInspection.manifest.name" :css="themeStore.pendingInspection.css" @close="previewImport = false" />
 </template>
 
 <style scoped>
diff --git a/frontend/src/services/themeImport.spec.ts b/frontend/src/services/themeImport.spec.ts
index 21d7d89..d1a819b 100644
--- a/frontend/src/services/themeImport.spec.ts
+++ b/frontend/src/services/themeImport.spec.ts
@@ -1,16 +1,27 @@
 // @vitest-environment happy-dom
 import { afterEach, expect, it, vi } from 'vitest'
 import { strToU8, zipSync } from 'fflate'
-import { decodeThemePackage, fetchThemePackage, inspectThemePackage, MAX_THEME_BYTES } from './themePackageService'
+import { decodeThemePackage, fetchThemePackage, inspectThemePackage, installTheme, MAX_THEME_BYTES, THEME_APP_VERSION } from './themePackageService'
 import paper from '@/assets/themes/paper-moments.theme?raw'
 
 afterEach(() => vi.unstubAllGlobals())
+it.each(['999.0.0', 'bad', '0.2'])('rejects unsupported minimum app version %s at inspection and install', async version => {
+  const source = paper.replace(/min_app_version:.*\r?\n/, `min_app_version: ${version}\n`)
+  expect((await inspectThemePackage(source)).compatible).toBe(false)
+  const { manifest, css } = await inspectThemePackage(paper)
+  await expect(installTheme({ ...manifest, min_app_version: version }, css)).rejects.toThrow()
+})
+it('accepts the current version and preserves real YAML list metadata', async () => {
+  const result = await inspectThemePackage(paper.replace(/min_app_version:.*\r?\n/, `min_app_version: ${THEME_APP_VERSION}\ntags: [paper, "a,b"]\n`))
+  expect(result.compatible).toBe(true)
+  expect(Array.isArray(result.manifest.tags)).toBe(true)
+})
 it('reads ZIP manifests under repository folders and validates the bundled CSS', async () => {
-  const [yaml, css] = paper.split('\n---\n')
+  const [yaml, css] = paper.split(/\r?\n---\r?\n/)
   const zip = zipSync({ 'repo-main/theme.yaml': strToU8(yaml!), 'repo-main/theme.css': strToU8(css!) })
   const result = await inspectThemePackage(await decodeThemePackage(zip))
   expect(result.compatible).toBe(true)
-  expect(result.css).toBe(css!.trim())
+  expect(result.css).toBe(css!.replace(/\r\n/g, '\n').trim())
 })
 it('accepts a zipped single-file theme', async () => {
   expect(await decodeThemePackage(zipSync({ 'paper.theme': strToU8(paper) }))).toBe(paper)
diff --git a/frontend/src/services/themePackageService.ts b/frontend/src/services/themePackageService.ts
index 226070c..477886c 100644
--- a/frontend/src/services/themePackageService.ts
+++ b/frontend/src/services/themePackageService.ts
@@ -1,5 +1,10 @@
 import type { InstalledTheme, ThemeManifest, ThemePackageInspection } from '@/contracts'
 import paperMomentsPackage from '@/assets/themes/paper-moments.theme?raw'
+import { valid, gt } from 'semver'
+import appPackage from '../../package.json'
+import { isMap, parseDocument } from 'yaml'
+
+export const THEME_APP_VERSION = appPackage.version
 
 const STORAGE_KEY = 'installed-themes'
 const ACTIVE_CUSTOM_KEY = 'active-custom-theme'
@@ -103,9 +108,11 @@ function validateManifest(raw: Record<string, unknown>): { manifest: ThemeManife
   if (!/^[a-z0-9_-]+$/.test(String(raw.theme_id))) {
     throw new Error('THEME_MANIFEST_INVALID: theme_id must match [a-z0-9_-]+')
   }
-  if (!/^\d+\.\d+\.\d+/.test(String(raw.version))) {
-    warnings.push('版本号格式建议使用 semver（如 1.0.0）')
+  for (const field of ['version', 'min_app_version']) {
+    if (typeof raw[field] !== 'string' || !valid(raw[field] as string)) throw new Error(`THEME_MANIFEST_INVALID: ${field} 必须是有效的 semver 版本号`)
   }
+  if (gt(raw.min_app_version as string, THEME_APP_VERSION)) throw new Error(`THEME_VERSION_INCOMPATIBLE: 主题需要应用 ${raw.min_app_version}，当前版本为 ${THEME_APP_VERSION}`)
+  if (raw.is_dark !== undefined && typeof raw.is_dark !== 'boolean') throw new Error('THEME_MANIFEST_INVALID: is_dark 必须是布尔值')
   const cssEntry = String(raw.css_entry)
   if (cssEntry.includes('://') || cssEntry.startsWith('data:')) {
     throw new Error('THEME_SECURITY_VIOLATION: css_entry must be a relative path within the package')
@@ -158,24 +165,9 @@ function removeThemeCss(themeId: string) {
 }
 
 function inspectYamlContent(yamlText: string): ThemeManifest {
-  const lines = yamlText.split('\n')
-  const result: Record<string, unknown> = {}
-  let currentKey: string | null = null
-  for (const line of lines) {
-    const trimmed = line.trim()
-    if (!trimmed || trimmed.startsWith('#')) continue
-    const match = trimmed.match(/^([a-z_]+):\s*(.*)$/i)
-    if (match) {
-      currentKey = match[1]
-      let value = match[2].trim()
-      if (value.startsWith('"') && value.endsWith('"')) value = value.slice(1, -1)
-      else if (value.startsWith("'") && value.endsWith("'")) value = value.slice(1, -1)
-      else if (value === 'true') result[currentKey] = true
-      else if (value === 'false') result[currentKey] = false
-      else if (/^\d+$/.test(value)) result[currentKey] = Number(value)
-      if (currentKey && !(currentKey in result)) result[currentKey] = value
-    }
-  }
+  const document = parseDocument(yamlText)
+  if (document.errors.length || document.warnings.length || !isMap(document.contents)) throw new Error('THEME_MANIFEST_INVALID: 主题清单必须是有效的 YAML 映射')
+  const result = document.toJS({ maxAliasCount: 20 }) as Record<string, unknown>
   const { manifest } = validateManifest(result)
   return manifest
 }
@@ -278,6 +270,7 @@ export async function installTheme(
   manifest: ThemeManifest,
   cssContent: string,
 ): Promise<InstalledTheme> {
+  validateManifest(manifest as unknown as Record<string, unknown>)
   // validateCssSafety 会对 @import / expression() / javascript: 抛错，
   // 必须在 applyThemeCss 之前调用 —— 未校验的 CSS 一律不许进入页面。
   const warnings = validateCssSafety(cssContent)
@@ -314,6 +307,7 @@ export async function enableTheme(themeId: string): Promise<InstalledTheme> {
   const themes = loadStoredThemes()
   const theme = themes.find((t) => t.theme_id === themeId)
   if (!theme) throw new Error('THEME_PACKAGE_NOT_FOUND')
+  validateManifest(theme.manifest as unknown as Record<string, unknown>)
   theme.enabled = true
   saveThemes(themes)
   return theme
@@ -346,6 +340,11 @@ export function getActiveCustomTheme(): string | null {
 }
 
 export function setActiveCustomTheme(themeId: string | null) {
+  if (themeId) {
+    const theme = loadStoredThemes().find(item => item.theme_id === themeId)
+    if (!theme) throw new Error('THEME_PACKAGE_NOT_FOUND')
+    validateManifest(theme.manifest as unknown as Record<string, unknown>)
+  }
   const css = themeId ? localStorage.getItem(`${STORAGE_KEY}-css-${themeId}`) : null
   // Validate before changing the current page. Only the selected theme owns a style node.
   if (css) validateCssSafety(css)
diff --git a/frontend/src/utils/diagramControls.ts b/frontend/src/utils/diagramControls.ts
new file mode 100644
index 0000000..57e13e4
--- /dev/null
+++ b/frontend/src/utils/diagramControls.ts
@@ -0,0 +1,14 @@
+/** Markup survives Milkdown's preview copying; the enclosing Vue component handles clicks. */
+export function appendDiagramControls(container: HTMLElement) {
+  const controls = document.createElement('div')
+  controls.className = 'diagram-controls'
+  controls.setAttribute('contenteditable', 'false')
+  for (const [action, label] of [['out', '缩小图表'], ['in', '放大图表'], ['reset', '重置缩放'], ['view', '大图查看']]) {
+    const button = document.createElement('button')
+    button.type = 'button'
+    button.dataset.diagramAction = action
+    button.textContent = label
+    controls.append(button)
+  }
+  container.append(controls)
+}
diff --git a/frontend/src/utils/markdown.ts b/frontend/src/utils/markdown.ts
index 907156e..c621133 100644
--- a/frontend/src/utils/markdown.ts
+++ b/frontend/src/utils/markdown.ts
@@ -6,6 +6,7 @@ import { bundledLanguagesInfo } from 'shiki/langs'
 import githubDark from '@shikijs/themes/github-dark'
 import githubLight from '@shikijs/themes/github-light'
 import { renderMermaid } from '@/services/mermaidService'
+import { appendDiagramControls } from './diagramControls'
 
 marked.setOptions({ gfm: true, breaks: true })
 
@@ -82,6 +83,7 @@ export async function renderMarkdown(source: string, options?: { theme?: 'light'
       const container = document.createElement('div')
       container.className = 'markdown-mermaid'
       container.innerHTML = result.svg
+      if (!result.warnings.length) appendDiagramControls(container)
       pre.replaceWith(container)
     } catch {
       const fallback = document.createElement('pre')