fix: Fix undefined query data and add fallback to Fontshare API

- Add gcTime parameter to TanStack Query config
- Add response validation in fetchFn with detailed logging
- Add fallback to Fontshare API when proxy fails
- Add USE_PROXY_API flag for easy switching
- Fix FontVirtualList generic type constraint
- Simplify font registration logic
- Add comprehensive console logging for debugging

Fixes: Query data cannot be undefined error

src/entities/Font/model/store/baseFontStore.svelte.ts

@@ -59,6 +59,7 @@ export abstract class BaseFontStore<TParams extends Record<string, any>> {
             queryKey: this.getQueryKey(params),
             queryFn: () => this.fetchFn(params),
             staleTime: 5 * 60 * 1000,
+            gcTime: 10 * 60 * 1000,
         };
     }