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/Connection.tsx

@@ -98,7 +98,6 @@ export default function Connection() {
     );
   }, [appConfig?.platforms]);
 
-  // Loading
   if (isLoading) {
     return (
       <div className="flex flex-1 items-center justify-center py-20">
@@ -107,20 +106,7 @@ export default function Connection() {
     );
   }
 
-  // Error
-  if (error || !appConfig) {
-    return (
-      <div className="flex flex-1 flex-col items-center justify-center p-8 text-center">
-        <p className="mb-4 text-lg text-dark-300">{t('common.error')}</p>
-        <button onClick={handleGoBack} className="btn-primary px-6 py-2">
-          {t('common.close')}
-        </button>
-      </div>
-    );
-  }
-
-  // No apps configured — check before subscription since empty config also has no subscription
-  if (!hasApps) {
+  if (error || !appConfig || !hasApps) {
     return (
       <div className="flex flex-1 flex-col items-center justify-center p-8 text-center">
         <div className="mb-4 flex h-16 w-16 items-center justify-center rounded-2xl bg-dark-800">