feat: add unified asset retry endpoint

backend/app/api/stories.py

@@ -5,33 +5,34 @@ import uuid
 from typing import AsyncGenerator
 
 from fastapi import APIRouter, Depends, Response
-from sse_starlette.sse import EventSourceResponse
-from sqlalchemy.ext.asyncio import AsyncSession
-
-from app.core.deps import require_user
-from app.core.logging import get_logger
-from app.core.rate_limiter import check_rate_limit
-from app.db.database import get_db
-from app.db.models import User
+from sqlalchemy.ext.asyncio import AsyncSession
+from sse_starlette.sse import EventSourceResponse
+
+from app.core.deps import require_user
+from app.core.logging import get_logger
+from app.core.rate_limiter import check_rate_limit
+from app.db.database import get_db
+from app.db.models import User
 from app.schemas.story_schemas import (
     AchievementItem,
     FullStoryResponse,
     GenerateRequest,
+    StoryAssetRetryRequest,
+    StorybookRequest,
+    StorybookResponse,
     StoryDetailResponse,
     StoryImageResponse,
     StoryListItem,
     StoryResponse,
-    StorybookRequest,
-    StorybookResponse,
 )
 from app.services import story_service
 from app.services.memory_service import build_enhanced_memory_context
 from app.services.provider_router import (
-    generate_story_content,
     generate_image,
+    generate_story_content,
 )
 from app.services.story_status import StoryAssetStatus, sync_story_status
-
+
 logger = get_logger(__name__)
 router = APIRouter()
 
@@ -69,12 +70,12 @@ async def generate_story_stream(
 ):
     """流式生成故事（SSE）。"""
     await check_rate_limit(f"story:{user.id}", RATE_LIMIT_REQUESTS, RATE_LIMIT_WINDOW)
-    
+
     # Validation
     profile_id, universe_id = await story_service.validate_profile_and_universe(
         request.child_profile_id, request.universe_id, user.id, db
     )
-    
+
     # Build Context
     memory_context = await build_enhanced_memory_context(profile_id, universe_id, db)
 
@@ -241,10 +242,21 @@ async def generate_story_image(
         "audio_status": story.audio_status,
         "last_error": story.last_error,
     }
-
-
-@router.get("/audio/{story_id}")
-async def get_story_audio(
+
+
+@router.post("/stories/{story_id}/assets/retry", response_model=StoryDetailResponse)
+async def retry_story_assets(
+    story_id: int,
+    payload: StoryAssetRetryRequest,
+    user: User = Depends(require_user),
+    db: AsyncSession = Depends(get_db),
+):
+    """Retry selected generated assets for a story."""
+    return await story_service.retry_story_assets(story_id, user.id, payload.assets, db)
+
+
+@router.get("/audio/{story_id}")
+async def get_story_audio(
     story_id: int,
     user: User = Depends(require_user),
     db: AsyncSession = Depends(get_db),