perf: optimize home screen rendering with ListView.builder and improve image loading performance by persisting disk cache

lib/core/widgets/s3_image.dart

@@ -112,6 +112,8 @@ class _S3ImageState extends State<S3Image> {
       height: widget.height,
       fit: widget.fit,
       alignment: widget.alignment,
+      fadeInDuration: const Duration(milliseconds: 200),
+      fadeOutDuration: const Duration(milliseconds: 100),
       placeholder: (ctx, _) => _buildPlaceholder(ctx),
       errorWidget: (ctx, _, err) {
         // On error (expired URL), evict and retry once