feat: 实现统一的错误处理机制和增强日志系统

添加错误码定义和统一响应格式
增强日志记录功能，支持模块专用日志记录器
实现全局异常捕获和友好错误提示
更新文档说明错误处理机制

tests/test_plugin_manager_coverage.py

@@ -135,11 +135,15 @@ def test_reload_plugin_error(plugin_manager):
     plugin_manager.loaded_plugins.add(full_name)
     mock_module = MagicMock()
     
+    # 创建一个模拟的logger，直接替换plugin_manager实例的logger属性
+    mock_logger = MagicMock()
+    plugin_manager.logger = mock_logger
+    
     with patch.dict("sys.modules", {full_name: mock_module}), \
-         patch("importlib.reload", side_effect=Exception("Reload error")), \
-         patch("core.managers.plugin_manager.logger") as mock_logger:
+         patch("importlib.reload", side_effect=Exception("Reload error")):
         
         # Should not raise exception
         plugin_manager.reload_plugin(full_name)
         mock_logger.exception.assert_called()
+        mock_logger.log_custom_exception.assert_called()
 

tests/test_ws.py

@@ -37,14 +37,18 @@ class TestWS:
             
             # 测试 WebSocket 未初始化的情况
             result = await ws.call_api("send_group_msg", {"group_id": 123456, "message": "test"})
-            assert result == {"status": "failed", "msg": "websocket not initialized"}
+            assert result["code"] == 2002  # WS_DISCONNECTED
+            assert result["success"] == False
+            assert "WebSocket未初始化" in result["message"]
             
             # 测试 WebSocket 已初始化但未连接的情况
             mock_ws = MagicMock()
             mock_ws.state = None
             ws.ws = mock_ws
             result = await ws.call_api("send_group_msg", {"group_id": 123456, "message": "test"})
-            assert result == {"status": "failed", "msg": "websocket is not open"}
+            assert result["code"] == 2002  # WS_DISCONNECTED
+            assert result["success"] == False
+            assert "WebSocket连接未打开" in result["message"]
 
     @pytest.mark.asyncio
     async def test_on_event_bot_initialization(self):