feat: 添加goRouter

lib/main.dart

@@ -1,16 +1,50 @@
 import 'package:flutter/material.dart';
+import 'package:go_router/go_router.dart';
+
+import 'com/xiaoyan/main/LoginPage.dart';
 
 void main() {
-  runApp(const MainApp());
+  runApp(MainApp());
 }
 
 class MainApp extends StatelessWidget {
-  const MainApp({super.key});
+  MainApp({super.key});
 
   @override
   Widget build(BuildContext context) {
-    return const MaterialApp(
-      home: Scaffold(body: Center(child: Text('Hello World!'))),
-    );
+    return MaterialApp.router(routerConfig: _route);
   }
+
+  final _route = GoRouter(
+    routes: <RouteBase>[
+      GoRoute(path: '/login', builder: (context, state) => const LoginPage()),
+      StatefulShellRoute.indexedStack(
+        builder: (context, state, navigationShell) => Scaffold(
+          body: navigationShell,
+          bottomNavigationBar: BottomNavigationBar(
+            items: const [
+              BottomNavigationBarItem(icon: Icon(Icons.home), label: 'Home'),
+              BottomNavigationBarItem(
+                icon: Icon(Icons.settings),
+                label: 'Settings',
+              ),
+            ],
+            onTap: (index) {
+              navigationShell.goBranch(index); // 跳转到GoRoute中定义的分支
+            },
+          ),
+        ),
+        branches: <StatefulShellBranch>[
+          StatefulShellBranch(
+            routes: <RouteBase>[
+              GoRoute(
+                path: '/',
+                builder: (context, state) => const HomePage(),
+              ),
+            ],
+          ),
+        ],
+      ),
+    ],
+  );
 }