feat(auth): 支持x-goog-api-key请求头认证

- 添加verify_key_or_goog_api_key方法，支持同时验证URL参数中的key和请求头中的x-goog-api-key
- 更新models接口使用新的认证方法，提高与Google API客户端的兼容性

app/core/security.py

@@ -72,3 +72,22 @@ class SecurityService:
             raise HTTPException(status_code=401, detail="Invalid auth_token")
 
         return token
+
+    async def verify_key_or_goog_api_key(
+        self, key: Optional[str] = None , x_goog_api_key: Optional[str] = Header(None)
+    ) -> str:
+        """验证URL中的key或请求头中的x-goog-api-key"""
+        # 如果URL中的key有效，直接返回
+        if key in self.allowed_tokens or key == self.auth_token:
+            return key
+        
+        # 否则检查请求头中的x-goog-api-key
+        if not x_goog_api_key:
+            logger.error("Invalid key and missing x-goog-api-key header")
+            raise HTTPException(status_code=401, detail="Invalid key and missing x-goog-api-key header")
+        
+        if x_goog_api_key not in self.allowed_tokens and x_goog_api_key != self.auth_token:
+            logger.error("Invalid key and invalid x-goog-api-key")
+            raise HTTPException(status_code=401, detail="Invalid key and invalid x-goog-api-key")
+        
+        return x_goog_api_key

app/router/gemini_routes.py

@@ -34,7 +34,7 @@ async def get_next_working_key(key_manager: KeyManager = Depends(get_key_manager
 @router.get("/models")
 @router_v1beta.get("/models")
 async def list_models(
-    _=Depends(security_service.verify_key),
+    _=Depends(security_service.verify_key_or_goog_api_key),
     key_manager: KeyManager = Depends(get_key_manager)
 ):
     """获取可用的Gemini模型列表"""

app/service/chat/gemini_chat_service.py

@@ -62,7 +62,7 @@ def _build_tools(model: str, payload: Dict[str, Any]) -> List[Dict[str, Any]]:
         tool.pop("googleSearch", None)
         tool.pop("codeExecution", None)
 
-    return [tool]
+    return [tool] if tool else []
 
 
 def _get_safety_settings(model: str) -> List[Dict[str, str]]: