reorg ui into app

lib/app/util/clip.dart

@@ -0,0 +1,21 @@
+import 'package:flutter/material.dart';
+
+class CircleClip extends StatelessWidget {
+  const CircleClip({
+    super.key,
+    required this.child,
+  });
+
+  final Widget child;
+
+  @override
+  Widget build(BuildContext context) {
+    return ClipOval(
+      clipBehavior: Clip.antiAlias,
+      child: AspectRatio(
+        aspectRatio: 1.0,
+        child: child,
+      ),
+    );
+  }
+}