fix: 通用智能体注入当前登录用户的 api_key

通用智能体没有 owner，配置文件默认也不写 api_key。
复用普通 bot 的 owner token 逻辑：按 user_identifier 查 agent_user.new_api_token。
若配置文件里显式配置了 api_key，则优先用配置的。

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

utils/fastapi_utils.py

@@ -606,12 +606,27 @@ async def fetch_bot_config_from_db(bot_user_id: str, user_identifier: Optional[s
         from agent.db_pool_manager import get_db_pool_manager
         from utils.settings import NEW_API_BASE_URL
 
-        # 通用智能体直接从配置文件读取
+        pool = get_db_pool_manager().pool
+
+        # 通用智能体从配置文件读取，并注入当前登录用户的 api_key
         if is_general_agent_id(bot_user_id):
             from utils.general_agent_config import get_general_agent_runtime_config
-            return get_general_agent_runtime_config(user_identifier)
-
-        pool = get_db_pool_manager().pool
+            config = get_general_agent_runtime_config(user_identifier)
+            if not config.get("api_key") and user_identifier:
+                async with pool.connection() as conn:
+                    async with conn.cursor() as cursor:
+                        await cursor.execute(
+                            "SELECT new_api_token FROM agent_user WHERE username = %s",
+                            (user_identifier,)
+                        )
+                        row = await cursor.fetchone()
+                        if row and row[0]:
+                            config["api_key"] = row[0]
+            logger.info(
+                f"Fetched general agent config: model={config['model']}, "
+                f"api_key={'*' + config['api_key'][-4:] if config.get('api_key') else 'N/A'}"
+            )
+            return config
 
         async with pool.connection() as conn:
             async with conn.cursor() as cursor: