feat(i18n): migrate all hardcoded Russian text to i18n

- Replace all hardcoded Russian strings with t() calls across 30+ files
- Add ~500 new translation keys to all 4 locales (ru, en, zh, fa)
- Convert module-level config objects to labelKey pattern
- Remove Russian fallbacks from t() calls (fallbackLng handles it)
- Replace DeepLinkRedirect custom i18n with standard t() calls
- Fix subscription.servers key collision (string vs object)

src/pages/AdminBanSystem.tsx

@@ -514,7 +514,7 @@ export default function AdminBanSystem() {
                 <svg className="h-5 w-5" viewBox="0 0 24 24" fill="currentColor">
                   <path d="M11.944 0A12 12 0 0 0 0 12a12 12 0 0 0 12 12 12 12 0 0 0 12-12A12 12 0 0 0 12 0a12 12 0 0 0-.056 0zm4.962 7.224c.1-.002.321.023.465.14a.506.506 0 0 1 .171.325c.016.093.036.306.02.472-.18 1.898-.962 6.502-1.36 8.627-.168.9-.499 1.201-.82 1.23-.696.065-1.225-.46-1.9-.902-1.056-.693-1.653-1.124-2.678-1.8-1.185-.78-.417-1.21.258-1.91.177-.184 3.247-2.977 3.307-3.23.007-.032.014-.15-.056-.212s-.174-.041-.249-.024c-.106.024-1.793 1.14-5.061 3.345-.48.33-.913.49-1.302.48-.428-.008-1.252-.241-1.865-.44-.752-.245-1.349-.374-1.297-.789.027-.216.325-.437.893-.663 3.498-1.524 5.83-2.529 6.998-3.014 3.332-1.386 4.025-1.627 4.476-1.635z" />
                 </svg>
-                {t('banSystem.contactTelegram', { defaultValue: 'Написать в Telegram' })}
+                {t('banSystem.contactTelegram')}
               </a>
 
               {/* Back Button */}
@@ -535,7 +535,7 @@ export default function AdminBanSystem() {
                     d="M10.5 19.5L3 12m0 0l7.5-7.5M3 12h18"
                   />
                 </svg>
-                {t('common.back', { defaultValue: 'Назад' })}
+                {t('common.back')}
               </button>
             </div>
           </div>