fix: resolve telegram auth token expiration and clean up codebase

- Fix stale initData comparison in clearStaleSessionIfNeeded that destroyed
  valid refresh tokens on mobile WebView reopens
- Restrict X-Telegram-Init-Data header to auth endpoints only
- Close Mini App on auth retry to force fresh initData from Telegram
- Merge Connection page error/not-configured states for better UX
- Remove unnecessary comments across 40+ files (section dividers,
  restating comments, noise catch block comments)
- Configure ESLint allowEmptyCatch to properly handle intentional
  empty catch blocks (62 warnings resolved)

src/api/adminUpdates.ts

@@ -1,7 +1,5 @@
 import apiClient from './client';
 
-// ============ Types ============
-
 export interface ReleaseItem {
   tag_name: string;
   name: string;
@@ -22,8 +20,6 @@ export interface ReleasesResponse {
   cabinet: ProjectReleasesInfo;
 }
 
-// ============ API ============
-
 export const adminUpdatesApi = {
   getReleases: async (): Promise<ReleasesResponse> => {
     const response = await apiClient.get('/cabinet/admin/updates/releases');