D96 修复: 彻底清理MCP Server残骸

server/mcp-server/index.js

@@ -867,9 +867,6 @@ app.post('/mcp', authenticate, async (req, res) => {
 
 // MCP 端点 — GET (SSE 通知流，保持连接)
 app.get('/mcp', authenticate, (req, res) => {
-  res.setHeader('Content-Type', 'text/event-stream');
-  res.setHeader('Cache-Control', 'no-cache');
-  res.setHeader('Connection', 'keep-alive');
   res.flushHeaders();
 
   // 发送心跳