feat: overhaul UI styling, improve templates, enhance services and tests

app/services/embedder.py

@@ -50,7 +50,9 @@ class ChromaManager:
         """获取或创建 papers_embeddings collection。"""
         try:
             col = self._client.get_collection("papers_embeddings")
-            logger.info("ChromaDB collection 'papers_embeddings' loaded, count=%d", col.count())
+            logger.info(
+                "ChromaDB collection 'papers_embeddings' loaded, count=%d", col.count()
+            )
             return col
         except Exception:
             pass
@@ -228,7 +230,9 @@ def index_paper(paper_id: str, texts_dict: dict | None = None) -> bool:
         col.upsert(
             ids=[arxiv_id],
             embeddings=[vec],
-            metadatas=[{"arxiv_id": arxiv_id, "title_zh": title_zh, "paper_date": paper_date}],
+            metadatas=[
+                {"arxiv_id": arxiv_id, "title_zh": title_zh, "paper_date": paper_date}
+            ],
         )
         logger.info("Indexed paper %s in ChromaDB", arxiv_id)
         return True
@@ -262,7 +266,9 @@ def index_batch(paper_ids: list[str]) -> dict:
         else:
             failed += 1
 
-    logger.info("Batch index: total=%d success=%d failed=%d", len(paper_ids), success, failed)
+    logger.info(
+        "Batch index: total=%d success=%d failed=%d", len(paper_ids), success, failed
+    )
     return {"total": len(paper_ids), "success": success, "failed": failed}