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/error.ts

@@ -0,0 +1,7 @@
+import type { NitroErrorHandler } from 'nitropack';
+
+const errorHandler: NitroErrorHandler = function (error, event) {
+  event.node.res.end(`[Error Handler] ${error.stack}`);
+};
+
+export default errorHandler;