feat(wecom): 企微 API 插件增加 MCP Streamable HTTP 端点

与 REST/OpenAPI 并存，按实例权限自动 tools/list，免手填工具。

Co-authored-by: Cursor <cursoragent@cursor.com>

server/dukang-api/src/common/interceptors/response.interceptor.ts

@@ -6,9 +6,9 @@ import {
 } from '@nestjs/common';
 import { Observable, map } from 'rxjs';
 
-function skipResponseWrap(url?: string): boolean {
+export function skipWecomPluginResponseWrap(url?: string): boolean {
   const path = (url || '').split('?')[0];
-  return path.endsWith('/wecom/plugin/openapi.json');
+  return path.endsWith('/wecom/plugin/openapi.json') || path.includes('/wecom/plugin/mcp');
 }
 
 @Injectable()
@@ -16,7 +16,7 @@ export class ResponseInterceptor implements NestInterceptor {
   intercept(context: ExecutionContext, next: CallHandler): Observable<unknown> {
     const req = context.switchToHttp().getRequest<{ originalUrl?: string; url?: string }>();
     const res = context.switchToHttp().getResponse<{ headersSent?: boolean }>();
-    if (skipResponseWrap(req.originalUrl || req.url)) {
+    if (skipWecomPluginResponseWrap(req.originalUrl || req.url)) {
       return next.handle();
     }
     return next.handle().pipe(