adding chat features, admin features and bug fixes

backend/src/controllers/config.controller.ts

@@ -0,0 +1,14 @@
+import { Request, Response } from 'express';
+import environment from '../config/environment';
+
+class ConfigController {
+  async getExternalLinks(_req: Request, res: Response): Promise<void> {
+    const links: Record<string, string> = {};
+    if (environment.nextcloudUrl) links.nextcloud = environment.nextcloudUrl;
+    if (environment.bookstack.url) links.bookstack = environment.bookstack.url;
+    if (environment.vikunja.url) links.vikunja = environment.vikunja.url;
+    res.status(200).json({ success: true, data: links });
+  }
+}
+
+export default new ConfigController();