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/adminRemnawave.ts

@@ -1,7 +1,5 @@
 import { apiClient } from './client';
 
-// ============ Types ============
-
 // Status & Connection
 export interface ConnectionStatus {
   status: string;
@@ -224,8 +222,6 @@ export interface SyncResponse {
   data?: Record<string, unknown>;
 }
 
-// ============ API ============
-
 export const adminRemnawaveApi = {
   // Status & Connection
   getStatus: async (): Promise<RemnaWaveStatusResponse> => {