Initial commit: Telegram Management System

Full-stack web application for Telegram management
- Frontend: Vue 3 + Vben Admin
- Backend: NestJS
- Features: User management, group broadcast, statistics

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

frontend-vben/apps/backend-mock/middleware/1.api.ts

@@ -0,0 +1,19 @@
+import { forbiddenResponse, sleep } from '~/utils/response';
+
+export default defineEventHandler(async (event) => {
+  event.node.res.setHeader(
+    'Access-Control-Allow-Origin',
+    event.headers.get('Origin') ?? '*',
+  );
+  if (event.method === 'OPTIONS') {
+    event.node.res.statusCode = 204;
+    event.node.res.statusMessage = 'No Content.';
+    return 'OK';
+  } else if (
+    ['DELETE', 'PATCH', 'POST', 'PUT'].includes(event.method) &&
+    event.path.startsWith('/api/system/')
+  ) {
+    await sleep(Math.floor(Math.random() * 2000));
+    return forbiddenResponse(event, '演示环境，禁止修改');
+  }
+});