fix/various fixes

api/app/features/memoir/asset_resolver.py

@@ -34,15 +34,19 @@ def collect_asset_ids_from_markdown(markdown: str) -> list[str]:
 
 
 def collect_asset_ids_for_chapter(chapter) -> set[str]:
-    """章节正文（canonical + 各 section）与 cover_asset_id 中出现的 asset id。"""
+    """章节正文 canonical、收录的各 story 正文、cover_asset_id 中的 asset id。"""
     ids: set[str] = set()
     md = getattr(chapter, "canonical_markdown", None) or ""
     ids.update(collect_asset_ids_from_markdown(md))
-    for sec in getattr(chapter, "sections", None) or []:
-        ids.update(collect_asset_ids_from_markdown(getattr(sec, "content", None) or ""))
     cid = getattr(chapter, "cover_asset_id", None)
     if cid:
         ids.add(str(cid))
+    for link in getattr(chapter, "story_links", None) or []:
+        st = getattr(link, "story", None)
+        if st is None:
+            continue
+        smd = getattr(st, "canonical_markdown", None) or ""
+        ids.update(collect_asset_ids_from_markdown(smd))
     return ids