feat: add week 3 audio and timeline enhancements

README.md

@@ -135,6 +135,8 @@ npm run build
 | GET | `/api/generations/{story_id}/jobs` | 查询故事生成与重试历史 |
 | GET | `/api/generations/{story_id}/provider-stats` | 查询 Provider 调用聚合指标 |
 | GET | `/api/generations/provider-analytics` | 查询当前用户跨故事 Provider 运营摘要 |
+| GET | `/api/audio/{story_id}/status` | 查询音频缓存状态，不触发生成 |
+| DELETE | `/api/audio/{story_id}/cache` | 清理故事音频缓存 |
 | GET | `/api/stories` | 故事列表 |
 | GET | `/api/stories/{story_id}` | 故事详情 |
 | DELETE | `/api/stories/{story_id}` | 删除故事 |
@@ -147,6 +149,7 @@ npm run build
 - `docs/product/unified-generation-workflow-prd.md`：统一生成工作流 PRD
 - `docs/planning/week-1-execution-backlog.md`：短期执行 backlog
 - `docs/planning/week-2-execution-backlog.md`：下一阶段执行 backlog
+- `docs/planning/week-2-to-4-execution-backlog.md`：Week 2 到 Week 4 总执行 backlog
 - `docs/planning/demo-checklist.md`：求职演示检查清单
 - `docs/planning/demo-validation-log.md`：本地 Docker 演示验证记录
 - `docs/planning/interview-pitch.md`：3 分钟项目讲解稿

admin-frontend/src/views/ChildProfileTimeline.vue

@@ -6,18 +6,19 @@ import BaseButton from '../components/ui/BaseButton.vue'
 import LoadingSpinner from '../components/ui/LoadingSpinner.vue'
 import EmptyState from '../components/ui/EmptyState.vue'
 import {
-  SparklesIcon,
+  SparklesIcon,
-  BookOpenIcon,
+  BookOpenIcon,
-  TrophyIcon,
+  TrophyIcon,
-  FlagIcon,
+  FlagIcon,
-  CalendarIcon,
+  HeartIcon,
+  CalendarIcon,
   ChevronLeftIcon,
   ExclamationCircleIcon
 } from '@heroicons/vue/24/solid'
 
-interface TimelineEvent {
+interface TimelineEvent {
-  date: string
+  date: string
-  type: 'story' | 'achievement' | 'milestone'
+  type: 'story' | 'achievement' | 'milestone' | 'reading_event' | 'memory'
   title: string
   description: string | null
   image_url: string | null
@@ -41,19 +42,23 @@ const profileId = route.params.id as string
 const profileName = ref('') // We might need to fetch profile details separately or store it
 
 function getIcon(type: string) {
-  switch (type) {
+  switch (type) {
-    case 'milestone': return FlagIcon
+    case 'milestone': return FlagIcon
-    case 'story': return BookOpenIcon
+    case 'story': return BookOpenIcon
-    case 'achievement': return TrophyIcon
+    case 'reading_event': return CalendarIcon
+    case 'memory': return HeartIcon
+    case 'achievement': return TrophyIcon
     default: return SparklesIcon
   }
 }
 
 function getColor(type: string) {
-  switch (type) {
+  switch (type) {
-    case 'milestone': return 'text-blue-500'
+    case 'milestone': return 'text-blue-500'
-    case 'story': return 'text-purple-500'
+    case 'story': return 'text-purple-500'
-    case 'achievement': return 'text-yellow-500'
+    case 'reading_event': return 'text-emerald-500'
+    case 'memory': return 'text-pink-500'
+    case 'achievement': return 'text-yellow-500'
     default: return 'text-gray-500'
   }
 }
@@ -83,7 +88,7 @@ async function fetchTimeline() {
 }
 
 function handleEventClick(event: TimelineEvent) {
-  if (event.type === 'story' && event.metadata?.story_id) {
+  if ((event.type === 'story' || event.type === 'reading_event' || event.type === 'memory') && event.metadata?.story_id) {
     if (event.metadata.mode === 'storybook') {
       router.push(`/storybook/view/${event.metadata.story_id}`)
     } else {
@@ -175,11 +180,17 @@ onMounted(fetchTimeline)
                    </div>
 
                    <!-- Role Badge -->
-                   <div v-if="event.type === 'achievement'" class="mt-4 inline-flex items-center px-3 py-1 rounded-full bg-yellow-50 text-yellow-700 text-xs font-bold border border-yellow-200">
+                   <div v-if="event.type === 'achievement'" class="mt-4 inline-flex items-center px-3 py-1 rounded-full bg-yellow-50 text-yellow-700 text-xs font-bold border border-yellow-200">
-                      <TrophyIcon class="h-3 w-3 mr-1" /> 成就解锁
+                      <TrophyIcon class="h-3 w-3 mr-1" /> 成就解锁
-                   </div>
+                   </div>
-                 </div>
+                   <div v-else-if="event.type === 'reading_event'" class="mt-4 inline-flex items-center px-3 py-1 rounded-full bg-emerald-50 text-emerald-700 text-xs font-bold border border-emerald-200">
-              </div>
+                      <CalendarIcon class="h-3 w-3 mr-1" /> 阅读记录
+                   </div>
+                   <div v-else-if="event.type === 'memory'" class="mt-4 inline-flex items-center px-3 py-1 rounded-full bg-pink-50 text-pink-700 text-xs font-bold border border-pink-200">
+                      <HeartIcon class="h-3 w-3 mr-1" /> 记忆沉淀
+                   </div>
+                 </div>
+              </div>
            </div>
          </div>
        </template>

admin-frontend/src/views/StoryDetail.vue

@@ -37,10 +37,25 @@ interface Story {
   }> | null
 }
 
+interface AudioCacheStatus {
+  story_id: number
+  audio_ready: boolean
+  cache_exists: boolean
+  cache_size_bytes: number | null
+  cache_updated_at: string | null
+  generation_status: string
+  text_status: string
+  image_status: string
+  audio_status: string
+  last_error: string | null
+  retryable_assets: Array<'image' | 'audio'>
+}
+
 const route = useRoute()
 const router = useRouter()
 
 const story = ref<Story | null>(null)
+const audioCacheStatus = ref<AudioCacheStatus | null>(null)
 const loading = ref(true)
 const imageLoading = ref(false)
 const audioLoading = ref(false)
@@ -60,6 +75,12 @@ const audioMeta = computed(() => getAssetStatusMeta(story.value?.audio_status))
 const canRetryImage = computed(() => story.value?.retryable_assets.includes('image') ?? false)
 const canRetryAudio = computed(() => story.value?.retryable_assets.includes('audio') ?? false)
 const isAudioGenerating = computed(() => story.value?.audio_status === 'generating')
+const audioCacheLabel = computed(() => {
+  if (!audioCacheStatus.value?.cache_exists) return '暂无缓存'
+  const size = audioCacheStatus.value.cache_size_bytes ?? 0
+  const kb = Math.max(1, Math.round(size / 1024))
+  return `已缓存 · ${kb} KB`
+})
 const assetGuidance = computed(() => {
   if (story.value?.generation_status === 'degraded_completed') {
     return '正文已经可读，失败的资源可以单独重试，不会覆盖当前故事。'
@@ -85,6 +106,7 @@ async function refreshStorySnapshot() {
   }
 
   story.value = data
+  await refreshAudioStatus().catch(() => undefined)
 }
 
 async function fetchStory() {
@@ -137,6 +159,7 @@ async function loadAudio() {
     const blob = await response.blob()
     audioUrl.value = URL.createObjectURL(blob)
     await refreshStorySnapshot().catch(() => undefined)
+    await refreshAudioStatus().catch(() => undefined)
   } catch (e) {
     error.value = e instanceof Error ? e.message : '音频加载失败'
     await refreshStorySnapshot().catch(() => undefined)
@@ -159,6 +182,7 @@ async function retryAudio() {
       audioUrl.value = null
       await loadAudio()
     }
+    await refreshAudioStatus().catch(() => undefined)
     await generationTraceRef.value?.refresh()
   } catch (e) {
     error.value = e instanceof Error ? e.message : '音频生成失败'
@@ -168,6 +192,28 @@ async function retryAudio() {
   }
 }
 
+async function refreshAudioStatus() {
+  if (!story.value) return
+  audioCacheStatus.value = await api.get<AudioCacheStatus>(`/api/audio/${story.value.id}/status`)
+}
+
+async function clearAudioCache() {
+  if (!story.value) return
+
+  audioLoading.value = true
+  error.value = ''
+
+  try {
+    audioCacheStatus.value = await api.delete<AudioCacheStatus>(`/api/audio/${story.value.id}/cache`)
+    audioUrl.value = null
+    story.value = await api.get<Story>(`/api/stories/${story.value.id}`)
+  } catch (e) {
+    error.value = e instanceof Error ? e.message : '清理音频缓存失败'
+  } finally {
+    audioLoading.value = false
+  }
+}
+
 function togglePlay() {
   if (!audioRef.value) return
 
@@ -202,6 +248,16 @@ function formatTime(seconds: number) {
   return `${mins}:${secs.toString().padStart(2, '0')}`
 }
 
+function formatDateTime(value?: string | null) {
+  if (!value) return '暂无'
+  return new Intl.DateTimeFormat('zh-CN', {
+    month: 'short',
+    day: 'numeric',
+    hour: '2-digit',
+    minute: '2-digit',
+  }).format(new Date(value))
+}
+
 async function deleteStory() {
   if (!story.value) return
 
@@ -329,6 +385,12 @@ onUnmounted(() => {
               <p class="text-sm text-gray-500 leading-6">
                 {{ audioMeta.description }} 音频首次生成后会缓存复用，状态记录的是当前可播放结果。
               </p>
+              <div class="mt-3 rounded-lg border border-gray-100 bg-gray-50 px-3 py-2 text-xs text-gray-500">
+                <div>{{ audioCacheLabel }}</div>
+                <div v-if="audioCacheStatus?.cache_updated_at" class="mt-1">
+                  更新时间：{{ formatDateTime(audioCacheStatus.cache_updated_at) }}
+                </div>
+              </div>
               <BaseButton
                 v-if="canRetryAudio"
                 size="sm"
@@ -339,6 +401,16 @@ onUnmounted(() => {
               >
                 {{ story.audio_status === 'failed' ? '重试音频' : '生成音频' }}
               </BaseButton>
+              <BaseButton
+                v-if="audioCacheStatus?.cache_exists"
+                size="sm"
+                variant="secondary"
+                :loading="audioLoading"
+                class="mt-3 w-full"
+                @click="clearAudioCache"
+              >
+                清理缓存
+              </BaseButton>
             </div>
           </div>
 

backend/app/api/profiles.py

@@ -10,7 +10,7 @@ from sqlalchemy.ext.asyncio import AsyncSession
 
 from app.core.deps import require_user
 from app.db.database import get_db
-from app.db.models import ChildProfile, Story, StoryUniverse, User
+from app.db.models import ChildProfile, MemoryItem, ReadingEvent, Story, StoryUniverse, User
 
 router = APIRouter()
 
@@ -67,7 +67,7 @@ class TimelineEvent(BaseModel):
     """Timeline event item."""
 
     date: str
-    type: Literal["story", "achievement", "milestone"]
+    type: Literal["story", "achievement", "milestone", "reading_event", "memory"]
     title: str
     description: str | None = None
     image_url: str | None = None
@@ -241,7 +241,10 @@ async def get_profile_timeline(
 
     # 2. Stories
     stories_result = await db.execute(
-        select(Story).where(Story.child_profile_id == profile_id)
+        select(Story).where(
+            Story.child_profile_id == profile_id,
+            Story.user_id == user.id,
+        )
     )
     for s in stories_result.scalars():
         events.append(TimelineEvent(
@@ -252,7 +255,89 @@ async def get_profile_timeline(
             metadata={"story_id": s.id, "mode": s.mode}
         ))
 
-    # 3. Achievements (from Universe)
+    # 3. Reading events
+    reading_result = await db.execute(
+        select(ReadingEvent, Story)
+        .outerjoin(Story, ReadingEvent.story_id == Story.id)
+        .where(ReadingEvent.child_profile_id == profile_id)
+        .order_by(ReadingEvent.created_at.desc())
+    )
+    reading_labels = {
+        "started": "开始阅读",
+        "completed": "读完故事",
+        "replayed": "再次阅读",
+        "skipped": "暂时跳过",
+    }
+    for reading_event, story in reading_result.all():
+        story_title = story.title if story else "未关联故事"
+        duration = (
+            f"阅读 {reading_event.reading_time} 秒"
+            if reading_event.reading_time
+            else "记录了一次阅读行为"
+        )
+        events.append(
+            TimelineEvent(
+                date=reading_event.created_at.isoformat(),
+                type="reading_event",
+                title=reading_labels.get(reading_event.event_type, "阅读记录"),
+                description=f"{story_title} · {duration}",
+                image_url=story.image_url if story else None,
+                metadata={
+                    "story_id": reading_event.story_id,
+                    "mode": story.mode if story else None,
+                    "event_type": reading_event.event_type,
+                    "reading_time": reading_event.reading_time,
+                },
+            )
+        )
+
+    # 4. Memory items
+    memories_result = await db.execute(
+        select(MemoryItem)
+        .where(MemoryItem.child_profile_id == profile_id)
+        .order_by(MemoryItem.created_at.desc())
+        .limit(20)
+    )
+    memory_labels = {
+        "recent_story": "近期故事记忆",
+        "favorite_character": "喜欢的角色",
+        "scary_element": "回避元素",
+        "vocabulary_growth": "词汇积累",
+        "emotional_highlight": "情感高光",
+        "reading_preference": "阅读偏好",
+        "milestone": "成长里程碑",
+        "skill_mastered": "掌握的技能",
+    }
+    for memory in memories_result.scalars():
+        value = memory.value or {}
+        title = str(
+            value.get("title")
+            or value.get("name")
+            or value.get("keyword")
+            or value.get("description")
+            or memory_labels.get(memory.type, memory.type)
+        )
+        events.append(
+            TimelineEvent(
+                date=memory.created_at.isoformat(),
+                type="memory",
+                title=f"记忆沉淀：{memory_labels.get(memory.type, memory.type)}",
+                description=title,
+                image_url=(
+                    value.get("image_url")
+                    if isinstance(value.get("image_url"), str)
+                    else None
+                ),
+                metadata={
+                    "memory_id": memory.id,
+                    "memory_type": memory.type,
+                    "story_id": value.get("story_id") or value.get("source_story_id"),
+                    "mode": value.get("mode"),
+                },
+            )
+        )
+
+    # 5. Achievements (from Universe)
     universes_result = await db.execute(
         select(StoryUniverse).where(StoryUniverse.child_profile_id == profile_id)
     )

backend/app/api/reading_events.py

@@ -109,7 +109,11 @@ async def create_reading_event(
                 value={
                     "story_id": story.id,
                     "title": story.title,
+                    "mode": story.mode,
+                    "image_url": story.image_url,
                     "event_type": payload.event_type,
+                    "reading_time": payload.reading_time,
+                    "source": "reading_event",
                 },
                 base_weight=weight,
                 last_used_at=datetime.now(timezone.utc),

backend/app/api/stories.py

@@ -24,6 +24,7 @@ from app.schemas.story_schemas import (
     GenerationRequest,
     GenerationResponse,
     StoryAssetRetryRequest,
+    StoryAudioStatusResponse,
     StorybookRequest,
     StorybookResponse,
     StoryDetailResponse,
@@ -395,8 +396,28 @@ async def get_story_audio(
     db: AsyncSession = Depends(get_db),
 ):
     """Get story audio (MP3)."""
-    audio_bytes = await story_service.generate_story_audio(story_id, user.id, db)
+    audio_bytes = await story_service.generate_story_audio(story_id, user.id, db)
-    return Response(content=audio_bytes, media_type="audio/mpeg")
+    return Response(content=audio_bytes, media_type="audio/mpeg")
+
+
+@router.get("/audio/{story_id}/status", response_model=StoryAudioStatusResponse)
+async def get_story_audio_status(
+    story_id: int,
+    user: User = Depends(require_user),
+    db: AsyncSession = Depends(get_db),
+):
+    """Get audio cache status without generating audio."""
+    return await story_service.get_story_audio_status(story_id, user.id, db)
+
+
+@router.delete("/audio/{story_id}/cache", response_model=StoryAudioStatusResponse)
+async def delete_story_audio_cache(
+    story_id: int,
+    user: User = Depends(require_user),
+    db: AsyncSession = Depends(get_db),
+):
+    """Clear cached story audio so it can be regenerated."""
+    return await story_service.clear_story_audio_cache(story_id, user.id, db)
 
 
 @router.get("/stories/{story_id}/achievements", response_model=list[AchievementItem])

backend/app/schemas/story_schemas.py

@@ -154,6 +154,16 @@ class StoryImageResponse(StoryStatusMixin):
     image_url: str | None
 
 
+class StoryAudioStatusResponse(StoryStatusMixin):
+    """Audio cache status for one story."""
+
+    story_id: int
+    audio_ready: bool
+    cache_exists: bool
+    cache_size_bytes: int | None = None
+    cache_updated_at: datetime | None = None
+
+
 class StoryAssetRetryRequest(BaseModel):
     """Retry selected generated assets for a story."""
 

backend/app/services/audio_storage.py

@@ -2,11 +2,23 @@
 
 from __future__ import annotations
 
+from dataclasses import dataclass
+from datetime import datetime, timezone
 from pathlib import Path
 
 from app.core.config import settings
 
 
+@dataclass(frozen=True)
+class AudioCacheMetadata:
+    """Metadata about one cached story audio file."""
+
+    exists: bool
+    path: str | None = None
+    size_bytes: int | None = None
+    updated_at: datetime | None = None
+
+
 def build_story_audio_path(story_id: int) -> str:
     """Build the cache path for a story audio file."""
 
@@ -25,6 +37,39 @@ def read_audio_cache(audio_path: str) -> bytes:
     return Path(audio_path).read_bytes()
 
 
+def get_audio_cache_metadata(audio_path: str | None) -> AudioCacheMetadata:
+    """Return cache metadata without reading the audio bytes."""
+
+    if not audio_path:
+        return AudioCacheMetadata(exists=False)
+
+    path = Path(audio_path)
+    if not path.is_file():
+        return AudioCacheMetadata(exists=False, path=str(path))
+
+    stat = path.stat()
+    return AudioCacheMetadata(
+        exists=True,
+        path=str(path),
+        size_bytes=stat.st_size,
+        updated_at=datetime.fromtimestamp(stat.st_mtime, tz=timezone.utc),
+    )
+
+
+def delete_audio_cache(audio_path: str | None) -> bool:
+    """Delete cached story audio if it exists."""
+
+    if not audio_path:
+        return False
+
+    path = Path(audio_path)
+    if not path.is_file():
+        return False
+
+    path.unlink()
+    return True
+
+
 def write_story_audio_cache(story_id: int, audio_data: bytes) -> str:
     """Persist story audio and return the saved file path."""
 

backend/app/services/story_service.py

@@ -25,6 +25,8 @@ from app.services.adapters.storybook.primary import Storybook
 from app.services.adapters.text.models import StoryOutput
 from app.services.audio_storage import (
     audio_cache_exists,
+    delete_audio_cache,
+    get_audio_cache_metadata,
     read_audio_cache,
     write_story_audio_cache,
 )
@@ -1536,9 +1538,66 @@ async def generate_story_audio(
         raise
 
     raise HTTPException(status_code=500, detail="Audio generation failed")
-
+
-
+
-async def get_story_achievements(
+async def get_story_audio_status(
+    story_id: int,
+    user_id: str,
+    db: AsyncSession,
+) -> dict:
+    """Return audio cache status without generating audio."""
+
+    story = await get_story_detail(story_id, user_id, db)
+    metadata = get_audio_cache_metadata(story.audio_path)
+
+    if story.audio_path and not metadata.exists:
+        logger.warning(
+            "story_audio_cache_missing_on_status",
+            story_id=story.id,
+            audio_path=story.audio_path,
+        )
+        story.audio_path = None
+        if story.audio_status == StoryAssetStatus.READY.value:
+            sync_story_status(story, audio_status=StoryAssetStatus.NOT_REQUESTED)
+            await db.commit()
+            metadata = get_audio_cache_metadata(story.audio_path)
+
+    return {
+        "story_id": story.id,
+        "audio_ready": story.audio_status == StoryAssetStatus.READY.value
+        and metadata.exists,
+        "cache_exists": metadata.exists,
+        "cache_size_bytes": metadata.size_bytes,
+        "cache_updated_at": metadata.updated_at,
+        "generation_status": story.generation_status,
+        "text_status": story.text_status,
+        "image_status": story.image_status,
+        "audio_status": story.audio_status,
+        "last_error": story.last_error,
+        "retryable_assets": story.retryable_assets,
+    }
+
+
+async def clear_story_audio_cache(
+    story_id: int,
+    user_id: str,
+    db: AsyncSession,
+) -> dict:
+    """Delete cached audio and mark audio as retryable again."""
+
+    story = await get_story_detail(story_id, user_id, db)
+    delete_audio_cache(story.audio_path)
+    story.audio_path = None
+    sync_story_status(
+        story,
+        audio_status=StoryAssetStatus.NOT_REQUESTED,
+        last_error=None,
+    )
+    await db.commit()
+    return await get_story_audio_status(story_id, user_id, db)
+
+
+async def get_story_achievements(
     story_id: int,
     user_id: str,
     db: AsyncSession,

backend/tests/test_reading_events.py

@@ -65,6 +65,23 @@ async def test_create_reading_event_updates_stats_and_memory(
             assert len(items) == 1
             assert items[0].type == "recent_story"
             assert items[0].value["story_id"] == test_story.id
+            assert items[0].value["mode"] == test_story.mode
+            assert items[0].value["reading_time"] == 120
+            assert items[0].value["source"] == "reading_event"
+
+            timeline_response = await client.get(f"/api/profiles/{profile_id}/timeline")
+            assert timeline_response.status_code == 200
+            timeline_events = timeline_response.json()["events"]
+            reading_events = [
+                event for event in timeline_events if event["type"] == "reading_event"
+            ]
+            memory_events = [event for event in timeline_events if event["type"] == "memory"]
+            assert reading_events
+            assert memory_events
+            assert reading_events[0]["metadata"]["story_id"] == test_story.id
+            assert reading_events[0]["metadata"]["reading_time"] == 120
+            assert memory_events[0]["metadata"]["memory_type"] == "recent_story"
+            assert memory_events[0]["metadata"]["story_id"] == test_story.id
 
             response = await client.post(
                 "/api/reading-events",

backend/tests/test_stories.py

@@ -256,6 +256,53 @@ class TestAudio:
         assert detail["generation_status"] == "partial_ready"
         assert detail["last_error"] is None
 
+        status_response = auth_client.get(f"/api/audio/{test_story.id}/status")
+        assert status_response.status_code == 200
+        status_data = status_response.json()
+        assert status_data["audio_ready"] is True
+        assert status_data["cache_exists"] is True
+        assert status_data["cache_size_bytes"] == len(b"fake-audio-bytes")
+        assert status_data["cache_updated_at"] is not None
+        assert status_data["audio_status"] == "ready"
+
+    def test_audio_status_does_not_generate_audio(
+        self,
+        auth_client: TestClient,
+        test_story,
+        mock_tts_provider,
+    ):
+        response = auth_client.get(f"/api/audio/{test_story.id}/status")
+
+        assert response.status_code == 200
+        data = response.json()
+        assert data["audio_ready"] is False
+        assert data["cache_exists"] is False
+        assert data["audio_status"] == "not_requested"
+        assert "audio" in data["retryable_assets"]
+        mock_tts_provider.assert_not_awaited()
+
+    def test_delete_audio_cache_makes_audio_retryable(
+        self,
+        auth_client: TestClient,
+        test_story,
+        mock_tts_provider,
+    ):
+        response = auth_client.get(f"/api/audio/{test_story.id}")
+        assert response.status_code == 200
+
+        cached_audio_path = Path(settings.story_audio_cache_dir) / f"story-{test_story.id}.mp3"
+        assert cached_audio_path.is_file()
+
+        response = auth_client.delete(f"/api/audio/{test_story.id}/cache")
+
+        assert response.status_code == 200
+        data = response.json()
+        assert data["audio_ready"] is False
+        assert data["cache_exists"] is False
+        assert data["audio_status"] == "not_requested"
+        assert "audio" in data["retryable_assets"]
+        assert not cached_audio_path.exists()
+
     def test_get_audio_regenerates_when_cache_file_is_missing(
         self,
         auth_client: TestClient,

docs/README.md

@@ -18,6 +18,9 @@
 - `planning/week-2-execution-backlog.md`
   Week 2 执行 backlog。用于继续推进演示闭环、前端状态体验和面试材料。
 
+- `planning/week-2-to-4-execution-backlog.md`
+  Week 2 到 Week 4 总执行 backlog。用于跟踪 Phase 2 音频缓存、时间线联动、Provider 运营摘要和 Demo 包装。
+
 - `planning/demo-checklist.md`
   求职演示检查清单。用于演示前确认 Docker 环境、核心链路、话术和风险预案。
 

docs/planning/demo-checklist.md

@@ -63,6 +63,7 @@ SMOKE_AUDIO=1 ./scripts/demo_smoke.sh
 - [ ] 绘本图片 retry 后 `image_status=ready`
 - [ ] 绘本阅读页能看到生成轨迹和资源重试历史
 - [ ] `/admin/providers/capabilities` 返回 `text/image/tts/storybook`
+- [ ] `/api/audio/{story_id}/status` 能查询音频缓存状态且不触发生成
 - [ ] 如果启用 `SMOKE_AUDIO=1`，音频 retry 后 `audio_status=ready`
 - [ ] 验证结果已记录到 `docs/planning/demo-validation-log.md`
 
@@ -82,8 +83,9 @@ SMOKE_AUDIO=1 ./scripts/demo_smoke.sh
    - 标题和正文
    - 封面状态
    - 音频状态
+   - 音频缓存大小与更新时间
    - 资产补全/重试入口
-6. 点击音频播放，说明音频缓存复用。
+6. 点击音频播放，说明音频缓存复用；必要时清理缓存后重新生成。
 
 ### 路径 B: 绘本
 

docs/planning/demo-validation-log.md

@@ -10,6 +10,10 @@
 - 用户端与管理端 `npm run build` 均通过；生成轨迹组件已支持未终止任务自动轮询。
 - `docker compose up -d --build` 已再次用当前代码重建本地演示栈。
 - `./scripts/demo_smoke.sh` 再次通过，并新增断言 `GET /api/generations/provider-analytics` 可以返回跨故事总调用、成功率、任务数、故事数和 Provider 明细。
+- 新增 Week 2-4 总 backlog 后，`backend/.venv/bin/python -m pytest backend/tests -q` 通过，85 个测试通过。
+- 音频缓存治理首版已验证：`GET /api/audio/{story_id}/status` 查询状态不触发生成，`DELETE /api/audio/{story_id}/cache` 可清理缓存并让音频重新进入可补全状态。
+- 时间线联动已验证：阅读事件会生成更完整的 recent_story 记忆，孩子时间线会展示阅读记录和记忆沉淀。
+- `./scripts/demo_smoke.sh` 已覆盖音频缓存状态查询。
 - 后端新增 `partial_ready`、`text_status` 与迁移 `0012_story_text_status` 后，`backend/.venv/bin/python -m pytest backend/tests -q` 通过，82 个测试通过。
 - `backend/.venv/bin/python -m ruff check backend/app backend/tests backend/alembic/versions/0012_add_story_text_status_and_partial_ready.py` 通过。
 - 用户端与管理端 `npm run build` 均通过。

docs/planning/week-2-to-4-execution-backlog.md

@@ -0,0 +1,77 @@
+# DreamWeaver 求职版重启：Week 2-4 执行 Backlog
+
+**Version**: 1.0
+**Date**: 2026-04-18
+**Scope**: 从可演示 MVP 推进到可讲清楚、可复验、可继续生产化的项目包
+
+---
+
+## 1. 总体目标
+
+Week 2 已完成演示闭环、统一生成工作流、generation job/event、状态模型、Provider 轨迹和 smoke 验证。Week 3-4 不继续堆大功能，而是围绕 PRD Phase 2 做增强：
+
+1. 让音频缓存从“可用”变成“可治理、可解释”。
+2. 让孩子档案、故事、阅读事件、记忆和时间线之间形成更清楚的产品闭环。
+3. 让 Provider 运营视角从单故事扩展到跨故事摘要。
+4. 把结果页、语音体验、测试、架构图和演示材料收成求职版项目包。
+
+---
+
+## 2. Week 2 完成状态
+
+| ID | Workstream | Task | Output | Priority | Status |
+| --- | --- | --- | --- | --- | --- |
+| W2-01 | Demo | 固化本地 Docker smoke 脚本 | `scripts/demo_smoke.sh` | P0 | Done |
+| W2-02 | Demo | 形成求职演示 checklist | `docs/planning/demo-checklist.md` | P0 | Done |
+| W2-03 | Planning | 输出 Week 2 执行 backlog | `docs/planning/week-2-execution-backlog.md` | P0 | Done |
+| W2-04 | Product | 写 3 分钟项目讲解稿 | `docs/planning/interview-pitch.md` | P0 | Done |
+| W2-05 | Frontend | 打磨创建弹窗状态文案 | 用户知道故事/绘本/资产正在生成 | P0 | Done |
+| W2-06 | Frontend | 强化故事详情页资产状态与重试 CTA | 图片/音频失败时可理解、可操作 | P0 | Done |
+| W2-07 | Frontend | 强化绘本阅读器降级态 | 缺图、失败、加载中不出现空白体验 | P0 | Done |
+| W2-08 | Backend | 梳理旧生成 API 兼容层策略 | `docs/technical/api-compatibility.md` | P1 | Done |
+| W2-09 | Backend | 判断 generation job 是否需要落库 | `docs/technical/generation-job-state.md` | P1 | Done |
+| W2-10 | QA | 补前端关键路径构建与 smoke 验证记录 | `docs/planning/demo-validation-log.md` | P1 | Done |
+| W2-11 | Docs | 输出 Week 1 Sprint Review | `docs/planning/week-1-sprint-review.md` | P1 | Done |
+| W2-12 | Docs | 更新 README 演示前检查流程 | README 本地演示说明 | P1 | Done |
+| W2-13 | Tech Debt | 清理 Pydantic v2 warning、Dockerfile warning 和旧 TODO | 测试与构建无关键 warning | P1 | Done |
+| W2-14 | Frontend | 同步管理端生成状态与资产补全体验 | 用户端/管理端状态体验不分叉 | P1 | Done |
+| W2-15 | Security | 移除管理后台弱默认密码 | 非 debug 管理后台拒绝空/弱密码 | P1 | Done |
+| W2-16 | Workflow | 轻量落库 generation job/event 与 retryable assets | 生成/资产补全过程可追踪 | P1 | Done |
+| W2-17 | Workflow | 落地 `partial_ready` 与 `text_status` | 主内容可读、资产待补全、资产失败可区分 | P1 | Done |
+| W2-18 | Ops | 跨故事 Provider 运营摘要 | `GET /api/generations/provider-analytics` | P1 | Done |
+| W2-19 | Frontend | 生成轨迹未终止任务自动轮询 | 前端为后台 worker 进度流预留体验 | P1 | Done |
+
+---
+
+## 3. Week 3 计划
+
+| ID | Workstream | Task | Output | Priority | Status |
+| --- | --- | --- | --- | --- | --- |
+| W3-01 | Planning | 固化 Week 2-4 总 backlog | 当前文档 | P0 | Done |
+| W3-02 | Backend | 音频缓存治理首版 | 音频缓存元信息、stale repair、删除缓存接口 | P0 | Done |
+| W3-03 | Frontend | 语音体验补充缓存状态 | 故事详情页展示缓存命中/文件大小/更新时间 | P1 | Done |
+| W3-04 | Product Loop | 时间线增强阅读事件和记忆上下文 | 时间线展示已读、重听、近期记忆来源 | P0 | Done |
+| W3-05 | Memory | 阅读事件写入更可解释的 memory value | recent_story 包含阅读时长、mode、封面、事件来源 | P1 | Done |
+| W3-06 | QA | 为 W3-02/W3-04 补测试和 smoke 断言 | 后端测试 + smoke 覆盖新增接口 | P0 | Done |
+| W3-07 | Docs | 更新 PRD、README、验证日志 | 文档与实现一致 | P1 | Done |
+
+---
+
+## 4. Week 4 计划
+
+| ID | Workstream | Task | Output | Priority | Status |
+| --- | --- | --- | --- | --- | --- |
+| W4-01 | Frontend | 结果页与阅读页体验收尾 | 故事详情、绘本阅读、故事库状态一致 | P0 | Pending |
+| W4-02 | Docs | 架构图与系统说明 | `docs/technical/architecture.md` 或 Mermaid 图 | P0 | Pending |
+| W4-03 | Demo | 求职版 Demo 包装 | 演示路径、风险预案、检查命令一页化 | P0 | Pending |
+| W4-04 | QA | 全量回归与验证记录 | pytest、ruff、前端 build、Docker smoke | P0 | Pending |
+| W4-05 | Product | 项目复盘与下一阶段路线 | Week 4 review + production backlog | P1 | Pending |
+
+---
+
+## 5. 执行原则
+
+- 每次推进 3-5 个能一起验证的任务，不做只改一行的小碎片。
+- 每批任务必须有明确验证：测试、构建、smoke 或文档验收。
+- 不扩大到支付、多租户、复杂监控或大规模视觉重做。
+- 优先保留求职表达价值：能解释用户价值、AI 不确定性、Provider 分层和工程取舍。

docs/product/job-search-relaunch-prd.md

@@ -331,7 +331,7 @@ DreamWeaver 是一款面向 3-8 岁亲子场景的个性化 AI 绘本与陪伴
 
 ### Phase 2: Enhancements (4 周)
 
-- 音频缓存与复用
+- 音频缓存与复用治理
 - 记忆系统与时间线联动优化
 - Provider 健康状态与成本摘要
 - 演示级前端优化，包括结果页、状态页和阅读页体验

docs/product/unified-generation-workflow-prd.md

@@ -466,7 +466,7 @@ DreamWeaver 当前存在以下工作流层面问题：
 
 ### Phase 2: Enhancements
 
-- 更进一步的音频缓存策略（如过期、清理与复用治理）
+- 更进一步的音频缓存策略（如过期策略）；当前已支持缓存状态查询和手动清理
 - 更细粒度资产状态
 - 阅读位置恢复
 - 工作流相关日志与监控

frontend/src/views/ChildProfileTimeline.vue

@@ -6,18 +6,19 @@ import BaseButton from '../components/ui/BaseButton.vue'
 import LoadingSpinner from '../components/ui/LoadingSpinner.vue'
 import EmptyState from '../components/ui/EmptyState.vue'
 import {
-  SparklesIcon,
+  SparklesIcon,
-  BookOpenIcon,
+  BookOpenIcon,
-  TrophyIcon,
+  TrophyIcon,
-  FlagIcon,
+  FlagIcon,
-  CalendarIcon,
+  HeartIcon,
+  CalendarIcon,
   ChevronLeftIcon,
   ExclamationCircleIcon
 } from '@heroicons/vue/24/solid'
 
-interface TimelineEvent {
+interface TimelineEvent {
-  date: string
+  date: string
-  type: 'story' | 'achievement' | 'milestone'
+  type: 'story' | 'achievement' | 'milestone' | 'reading_event' | 'memory'
   title: string
   description: string | null
   image_url: string | null
@@ -41,19 +42,23 @@ const profileId = route.params.id as string
 const profileName = ref('') // We might need to fetch profile details separately or store it
 
 function getIcon(type: string) {
-  switch (type) {
+  switch (type) {
-    case 'milestone': return FlagIcon
+    case 'milestone': return FlagIcon
-    case 'story': return BookOpenIcon
+    case 'story': return BookOpenIcon
-    case 'achievement': return TrophyIcon
+    case 'reading_event': return CalendarIcon
+    case 'memory': return HeartIcon
+    case 'achievement': return TrophyIcon
     default: return SparklesIcon
   }
 }
 
 function getColor(type: string) {
-  switch (type) {
+  switch (type) {
-    case 'milestone': return 'text-blue-500'
+    case 'milestone': return 'text-blue-500'
-    case 'story': return 'text-purple-500'
+    case 'story': return 'text-purple-500'
-    case 'achievement': return 'text-yellow-500'
+    case 'reading_event': return 'text-emerald-500'
+    case 'memory': return 'text-pink-500'
+    case 'achievement': return 'text-yellow-500'
     default: return 'text-gray-500'
   }
 }
@@ -83,7 +88,7 @@ async function fetchTimeline() {
 }
 
 function handleEventClick(event: TimelineEvent) {
-  if (event.type === 'story' && event.metadata?.story_id) {
+  if ((event.type === 'story' || event.type === 'reading_event' || event.type === 'memory') && event.metadata?.story_id) {
     if (event.metadata.mode === 'storybook') {
       router.push(`/storybook/view/${event.metadata.story_id}`)
     } else {
@@ -175,11 +180,17 @@ onMounted(fetchTimeline)
                    </div>
 
                    <!-- Role Badge -->
-                   <div v-if="event.type === 'achievement'" class="mt-4 inline-flex items-center px-3 py-1 rounded-full bg-yellow-50 text-yellow-700 text-xs font-bold border border-yellow-200">
+                   <div v-if="event.type === 'achievement'" class="mt-4 inline-flex items-center px-3 py-1 rounded-full bg-yellow-50 text-yellow-700 text-xs font-bold border border-yellow-200">
-                      <TrophyIcon class="h-3 w-3 mr-1" /> 成就解锁
+                      <TrophyIcon class="h-3 w-3 mr-1" /> 成就解锁
-                   </div>
+                   </div>
-                 </div>
+                   <div v-else-if="event.type === 'reading_event'" class="mt-4 inline-flex items-center px-3 py-1 rounded-full bg-emerald-50 text-emerald-700 text-xs font-bold border border-emerald-200">
-              </div>
+                      <CalendarIcon class="h-3 w-3 mr-1" /> 阅读记录
+                   </div>
+                   <div v-else-if="event.type === 'memory'" class="mt-4 inline-flex items-center px-3 py-1 rounded-full bg-pink-50 text-pink-700 text-xs font-bold border border-pink-200">
+                      <HeartIcon class="h-3 w-3 mr-1" /> 记忆沉淀
+                   </div>
+                 </div>
+              </div>
            </div>
          </div>
        </template>

frontend/src/views/StoryDetail.vue

@@ -37,10 +37,25 @@ interface Story {
   }> | null
 }
 
+interface AudioCacheStatus {
+  story_id: number
+  audio_ready: boolean
+  cache_exists: boolean
+  cache_size_bytes: number | null
+  cache_updated_at: string | null
+  generation_status: string
+  text_status: string
+  image_status: string
+  audio_status: string
+  last_error: string | null
+  retryable_assets: Array<'image' | 'audio'>
+}
+
 const route = useRoute()
 const router = useRouter()
 
 const story = ref<Story | null>(null)
+const audioCacheStatus = ref<AudioCacheStatus | null>(null)
 const loading = ref(true)
 const imageLoading = ref(false)
 const audioLoading = ref(false)
@@ -60,6 +75,12 @@ const audioMeta = computed(() => getAssetStatusMeta(story.value?.audio_status))
 const canRetryImage = computed(() => story.value?.retryable_assets.includes('image') ?? false)
 const canRetryAudio = computed(() => story.value?.retryable_assets.includes('audio') ?? false)
 const isAudioGenerating = computed(() => story.value?.audio_status === 'generating')
+const audioCacheLabel = computed(() => {
+  if (!audioCacheStatus.value?.cache_exists) return '暂无缓存'
+  const size = audioCacheStatus.value.cache_size_bytes ?? 0
+  const kb = Math.max(1, Math.round(size / 1024))
+  return `已缓存 · ${kb} KB`
+})
 const assetGuidance = computed(() => {
   if (story.value?.generation_status === 'degraded_completed') {
     return '正文已经可读，失败的资源可以单独重试，不会覆盖当前故事。'
@@ -85,6 +106,7 @@ async function refreshStorySnapshot() {
   }
 
   story.value = data
+  await refreshAudioStatus().catch(() => undefined)
 }
 
 async function fetchStory() {
@@ -137,6 +159,7 @@ async function loadAudio() {
     const blob = await response.blob()
     audioUrl.value = URL.createObjectURL(blob)
     await refreshStorySnapshot().catch(() => undefined)
+    await refreshAudioStatus().catch(() => undefined)
   } catch (e) {
     error.value = e instanceof Error ? e.message : '音频加载失败'
     await refreshStorySnapshot().catch(() => undefined)
@@ -159,6 +182,7 @@ async function retryAudio() {
       audioUrl.value = null
       await loadAudio()
     }
+    await refreshAudioStatus().catch(() => undefined)
     await generationTraceRef.value?.refresh()
   } catch (e) {
     error.value = e instanceof Error ? e.message : '音频生成失败'
@@ -168,6 +192,28 @@ async function retryAudio() {
   }
 }
 
+async function refreshAudioStatus() {
+  if (!story.value) return
+  audioCacheStatus.value = await api.get<AudioCacheStatus>(`/api/audio/${story.value.id}/status`)
+}
+
+async function clearAudioCache() {
+  if (!story.value) return
+
+  audioLoading.value = true
+  error.value = ''
+
+  try {
+    audioCacheStatus.value = await api.delete<AudioCacheStatus>(`/api/audio/${story.value.id}/cache`)
+    audioUrl.value = null
+    story.value = await api.get<Story>(`/api/stories/${story.value.id}`)
+  } catch (e) {
+    error.value = e instanceof Error ? e.message : '清理音频缓存失败'
+  } finally {
+    audioLoading.value = false
+  }
+}
+
 function togglePlay() {
   if (!audioRef.value) return
 
@@ -202,6 +248,16 @@ function formatTime(seconds: number) {
   return `${mins}:${secs.toString().padStart(2, '0')}`
 }
 
+function formatDateTime(value?: string | null) {
+  if (!value) return '暂无'
+  return new Intl.DateTimeFormat('zh-CN', {
+    month: 'short',
+    day: 'numeric',
+    hour: '2-digit',
+    minute: '2-digit',
+  }).format(new Date(value))
+}
+
 async function deleteStory() {
   if (!story.value) return
 
@@ -329,6 +385,12 @@ onUnmounted(() => {
               <p class="text-sm text-gray-500 leading-6">
                 {{ audioMeta.description }} 音频首次生成后会缓存复用，状态记录的是当前可播放结果。
               </p>
+              <div class="mt-3 rounded-lg border border-gray-100 bg-gray-50 px-3 py-2 text-xs text-gray-500">
+                <div>{{ audioCacheLabel }}</div>
+                <div v-if="audioCacheStatus?.cache_updated_at" class="mt-1">
+                  更新时间：{{ formatDateTime(audioCacheStatus.cache_updated_at) }}
+                </div>
+              </div>
               <BaseButton
                 v-if="canRetryAudio"
                 size="sm"
@@ -339,6 +401,16 @@ onUnmounted(() => {
               >
                 {{ story.audio_status === 'failed' ? '重试音频' : '生成音频' }}
               </BaseButton>
+              <BaseButton
+                v-if="audioCacheStatus?.cache_exists"
+                size="sm"
+                variant="secondary"
+                :loading="audioLoading"
+                class="mt-3 w-full"
+                @click="clearAudioCache"
+              >
+                清理缓存
+              </BaseButton>
             </div>
           </div>
 

scripts/demo_smoke.sh

@@ -96,6 +96,11 @@ assert_jq "$story_image_json" '.generation_status == "partial_ready" and .image_
 assert_jq "$story_image_json" '(.retryable_assets | index("image")) == null and (.retryable_assets | index("audio")) != null' "story image retry should leave only audio retryable"
 echo "$story_image_json" | jq '{id,title,generation_status,image_status,audio_status,retryable_assets}'
 
+say "Checking story audio cache status"
+story_audio_status_json="$(get_json "$APP_URL/api/audio/$story_id/status")"
+assert_jq "$story_audio_status_json" '.audio_ready == false and .cache_exists == false and .audio_status == "not_requested"' "story audio status should not generate audio"
+echo "$story_audio_status_json" | jq '{story_id,audio_ready,cache_exists,audio_status,retryable_assets}'
+
 if [[ "$SMOKE_AUDIO" == "1" ]]; then
   say "Retrying story audio"
   story_audio_json="$(post_json "$APP_URL/api/generations/$story_id/retry-assets" '{"assets":["audio"]}')"
@@ -106,6 +111,8 @@ if [[ "$SMOKE_AUDIO" == "1" ]]; then
     echo "Unexpected audio response: $audio_probe" >&2
     exit 1
   fi
+  story_audio_status_json="$(get_json "$APP_URL/api/audio/$story_id/status")"
+  assert_jq "$story_audio_status_json" '.audio_ready == true and .cache_exists == true and .cache_size_bytes > 0' "story audio should have cache metadata after generation"
   echo "$story_audio_json" | jq '{id,title,generation_status,image_status,audio_status,retryable_assets}'
 else
   say "Skipping audio smoke; set SMOKE_AUDIO=1 to include TTS"