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/pages/AdminRemnawave.tsx

@@ -23,8 +23,6 @@ import {
   RemnawaveIcon,
 } from '../components/icons';
 
-// ============ Icons ============
-
 const BackIcon = () => (
   <svg
     className="h-5 w-5 text-dark-400"
@@ -37,8 +35,6 @@ const BackIcon = () => (
   </svg>
 );
 
-// ============ Helpers ============
-
 const formatBytes = (bytes: number): string => {
   if (bytes === 0) return '0 B';
   const k = 1024;
@@ -100,8 +96,6 @@ const getCountryFlag = (code: string | null | undefined): string => {
   return codeMap[code.toUpperCase()] || code;
 };
 
-// ============ Sub-Components ============
-
 interface StatCardProps {
   label: string;
   value: string | number;
@@ -333,8 +327,6 @@ function SyncCard({ title, description, onAction, isLoading, lastResult }: SyncC
   );
 }
 
-// ============ Tab Components ============
-
 interface OverviewTabProps {
   stats: SystemStatsResponse | undefined;
   isLoading: boolean;
@@ -873,8 +865,6 @@ function SyncTab({
   );
 }
 
-// ============ Main Component ============
-
 type TabType = 'overview' | 'nodes' | 'squads' | 'sync';
 
 export default function AdminRemnawave() {