refactor: 移除 agent 批量重试逻辑中的多余 try 块并优化缩进

app/agent/__init__.py

@@ -875,7 +875,6 @@ class AgentManager:
         if not history_ids:
             return
 
-        try:
         session_id = f"__agent_retry_transfer_batch_{uuid.uuid4().hex[:8]}__"
         user_id = "system"
 
@@ -935,6 +934,8 @@ class AgentManager:
                 f"Respond in Chinese (中文)."
             )
 
+        try:
+
             await self.process_message(
                 session_id=session_id,
                 user_id=user_id,