feat:增加主题色模块

lib/layout/app_navbar.dart

@@ -0,0 +1,37 @@
+import 'package:flutter/material.dart';
+import 'menu.dart';
+
+class AppNavbar extends StatefulWidget {
+  final int currentPageIndex;
+  final Function(int) onTapNavbarItem;
+
+  const AppNavbar({
+    super.key,
+    required this.currentPageIndex,
+    required this.onTapNavbarItem,
+  });
+
+  @override
+  State<StatefulWidget> createState() => AppNavbarState();
+}
+
+class AppNavbarState extends State<AppNavbar> {
+
+  @override
+  Widget build(BuildContext context) {
+    final colors = Theme.of(context).colorScheme;
+
+    return BottomNavigationBar(
+      currentIndex: widget.currentPageIndex,
+      onTap: widget.onTapNavbarItem,
+      items: bottomNavItems,
+      type: BottomNavigationBarType.fixed,
+      selectedItemColor: colors.primary,
+      unselectedItemColor: colors.onSurface.withAlpha(150),
+      showSelectedLabels: true,
+      showUnselectedLabels: true,
+      backgroundColor: colors.surface,
+      elevation: 8,
+    );
+  }
+}