修复一些已知问题

api/app/tasks/story_image_tasks.py

@@ -18,6 +18,7 @@ from app.core.dependencies import get_image_generator
 from app.core.logging import get_logger
 from app.core.redis_lock import acquire_redis_lock, release_redis_lock
 from app.features.asset.models import Asset
+from app.features.memoir.asset_resolver import strip_asset_image_refs_from_markdown
 from app.features.memoir.memoir_images.storage import TencentCosStorageService
 from app.features.story.backfill import backfill_image_into_markdown
 from app.features.story.models import Story, StoryImageIntent, StoryVersion
@@ -262,7 +263,7 @@ def generate_story_image(self, story_id: str):
                 db.commit()
                 return {"status": "success_no_snapshot", "asset_id": asset_id}
 
-            base_md = ver.markdown_snapshot or ""
+            base_md = strip_asset_image_refs_from_markdown(ver.markdown_snapshot or "")
             alt_text = (getattr(intent_db, "prompt_brief", None) or "").strip()
             if not alt_text:
                 alt_text = (getattr(intent_db, "caption", None) or "").strip()