feat:增加记录对话框内容

lib/pages/stats_page.dart

@@ -0,0 +1,15 @@
+import 'package:flutter/material.dart';
+
+class StatsPage extends StatefulWidget {
+  const StatsPage({super.key});
+
+  @override
+  State<StatsPage> createState() => _StatsPageState();
+}
+
+class _StatsPageState extends State<StatsPage> {
+  @override
+  Widget build(BuildContext context) {
+    return Center(child: Text('统计'));
+  }
+}