reorg ui into app

lib/app/screens/album_screen.dart

@@ -0,0 +1,32 @@
+import 'package:cached_network_image/cached_network_image.dart';
+import 'package:flutter/material.dart';
+import 'package:go_router/go_router.dart';
+
+class AlbumScreen extends StatelessWidget {
+  const AlbumScreen({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      body: Center(
+        child: Column(
+          mainAxisAlignment: MainAxisAlignment.center,
+          children: [
+            Text('Album!'),
+            TextButton(
+              onPressed: () {
+                context.push('/artist');
+              },
+              child: Text('Artist...'),
+            ),
+            CachedNetworkImage(
+              imageUrl: 'https://placehold.net/400x400.png',
+              placeholder: (context, url) => CircularProgressIndicator(),
+              errorWidget: (context, url, error) => Icon(Icons.error),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}