重构代码，统一config配置

backend/rag_core/client.py

@@ -0,0 +1,27 @@
+# rag_core/client.py
+import os
+from .config import QDRANT_URL, QDRANT_API_KEY
+from typing import Optional
+from qdrant_client import QdrantClient
+
+
+
+def create_qdrant_client(
+    url: Optional[str] = None,
+    api_key: Optional[str] = None,
+    timeout: int = 300,  # 索引构建需要较长超时
+) -> QdrantClient:
+    effective_url = url or QDRANT_URL
+    effective_api_key = api_key or QDRANT_API_KEY
+
+    if not effective_url:
+        raise ValueError("Qdrant URL 未配置")
+
+    client_kwargs = {
+        "url": effective_url,
+        "timeout": timeout,
+    }
+    if effective_api_key:
+        client_kwargs["api_key"] = effective_api_key
+
+    return QdrantClient(**client_kwargs)