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/components/ui/backgrounds/background-beams-collision.tsx

@@ -125,7 +125,7 @@ function CollisionMechanism({
     }, 2000);
 
     return () => clearTimeout(timer);
-  }, [collision.detected]);
+  }, [collision.detected, collision.coordinates]);
 
   return (
     <>