WIP-CHECKPOINT[auth-refactor]: 固化工程师崩溃前部分成果 + 同树其他未提交WIP（仅源码，不含密钥/二进制）-- 待重激活工程师续作

backend/app/api/conversations.py

@@ -176,6 +176,29 @@ async def get_conversation(
     session_service = SessionService(db, redis_client=redis)
     conversation = await session_service.get_conversation(conversation_id)
 
+    # 如果会话中员工姓名为空，从 employees 表回退获取
+    if not conversation.employee_name:
+        try:
+            from sqlalchemy import select
+            from app.models.employee import Employee
+            stmt = select(Employee).where(Employee.employee_id == conversation.employee_id)
+            result = await db.execute(stmt)
+            employee = result.scalars().first()
+            if employee and employee.name:
+                conversation.employee_name = employee.name
+                conversation.department = employee.department or ""
+                conversation.position = employee.position or ""
+                conversation.level = employee.level or ""
+                logger.info(
+                    f"从employees表回退获取会话详情员工信息: employee_id={conversation.employee_id}, "
+                    f"name={employee.name}"
+                )
+        except Exception as e:
+            logger.warning(
+                f"从employees表获取会话详情员工信息失败: employee_id={conversation.employee_id}, "
+                f"error={e}"
+            )
+
     # 获取员工头像（带缓存）
     avatar = await session_service._get_employee_avatar(conversation.employee_id)
 
@@ -214,14 +237,18 @@ async def assign_conversation(
         redis_client = settings.create_redis_client()
         wecom_service = WecomService(redis_client)
         session_service = SessionService(db, wecom_service=wecom_service)
-    except Exception:
-        logger.warning("创建企微服务失败，接入通知将不发送")
+    except Exception as e:
+        logger.warning(f"创建企微服务失败: {e}，接入通知将不发送")
         session_service = SessionService(db)
 
-    conversation = await session_service.assign_agent(
-        conversation_id=conversation_id,
-        agent_id=body.agent_id,
-    )
+    try:
+        conversation = await session_service.assign_agent(
+            conversation_id=conversation_id,
+            agent_id=body.agent_id,
+        )
+    except Exception as e:
+        logger.error(f"接单失败: conversation_id={conversation_id}, agent_id={body.agent_id}, error={e}")
+        raise
 
     # 关闭企微服务连接
     if redis_client: