feat: 重构MCP功能和AI服务提供者架构

backend/app/mcp/status_sync.py

@@ -0,0 +1,50 @@
+"""MCP插件状态同步服务
+
+将内存中的会话状态变更同步到数据库，确保状态一致性。
+"""
+
+from typing import Dict, Any
+from sqlalchemy import update
+from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker
+
+from app.models.mcp_plugin import MCPPlugin
+from app.logger import get_logger
+
+logger = get_logger(__name__)
+
+
+async def sync_status_to_db(event: Dict[str, Any]):
+    """
+    状态变更回调 - 同步到数据库
+    """
+    user_id = event["user_id"]
+    plugin_name = event["plugin_name"]
+    new_status = event["new_status"]
+    reason = event.get("reason", "")
+    
+    try:
+        from app.database import get_engine
+        
+        engine = await get_engine(user_id)
+        AsyncSessionLocal = async_sessionmaker(engine, class_=AsyncSession, expire_on_commit=False)
+        
+        async with AsyncSessionLocal() as db:
+            stmt = (
+                update(MCPPlugin)
+                .where(MCPPlugin.user_id == user_id, MCPPlugin.plugin_name == plugin_name)
+                .values(status=new_status, last_error=reason if new_status == "error" else None)
+            )
+            await db.execute(stmt)
+            await db.commit()
+            
+            logger.debug(f"✅ 状态已同步到数据库: {plugin_name} -> {new_status}")
+            
+    except Exception as e:
+        logger.error(f"❌ 状态同步失败: {plugin_name}, 错误: {e}")
+
+
+def register_status_sync():
+    """注册状态同步回调到MCP客户端"""
+    from app.mcp import mcp_client
+    mcp_client.register_status_callback(sync_status_to_db)
+    logger.info("✅ MCP状态同步服务已注册")