Source Code added

mobile/lib/widgets/asset_grid/thumbnail_placeholder.dart

@@ -0,0 +1,28 @@
+import 'package:flutter/material.dart';
+import 'package:immich_mobile/extensions/build_context_extensions.dart';
+import 'package:immich_mobile/extensions/theme_extensions.dart';
+
+class ThumbnailPlaceholder extends StatelessWidget {
+  final EdgeInsets margin;
+  final double width;
+  final double height;
+
+  const ThumbnailPlaceholder({super.key, this.margin = EdgeInsets.zero, this.width = 250, this.height = 250});
+
+  @override
+  Widget build(BuildContext context) {
+    var gradientColors = [
+      context.colorScheme.surfaceContainer,
+      context.colorScheme.surfaceContainer.darken(amount: .1),
+    ];
+
+    return Container(
+      width: width,
+      height: height,
+      margin: margin,
+      decoration: BoxDecoration(
+        gradient: LinearGradient(colors: gradientColors, begin: Alignment.topCenter, end: Alignment.bottomCenter),
+      ),
+    );
+  }
+}