fix: resolve all 14 ESLint warnings across the codebase

- Add varsIgnorePattern to no-unused-vars for destructuring patterns
- Fix all react-hooks/exhaustive-deps by adding missing dependencies
- Refactor useAnimatedNumber to use ref instead of stale state closure
- Wrap handleLinkResult in useCallback for stable deps
- Extract OAuth utilities from OAuthCallback.tsx to utils/oauth.ts
- Extract background config utilities to utils/backgroundConfig.ts
- Remove unused catch parameter in GiftSubscription

src/pages/LinkTelegramCallback.tsx

@@ -4,7 +4,7 @@ import { useTranslation } from 'react-i18next';
 import { authApi } from '../api/auth';
 import { useToast } from '../components/Toast';
 import { LINK_TELEGRAM_STATE_KEY } from './ConnectedAccounts';
-import { getErrorDetail } from './OAuthCallback';
+import { getErrorDetail } from '../utils/oauth';
 
 export default function LinkTelegramCallback() {
   const { t } = useTranslation();