feat:更新好友菜谱功能

lib/views/recipe_detail.dart

@@ -82,8 +82,17 @@ class _RecipeDetailState extends State<RecipeDetailPage> {
 
   @override
   Widget build(BuildContext context) {
+    final colors = Theme.of(context).colorScheme;
+
     return Scaffold(
-      appBar: AppBar(title: Text('菜谱信息')),
+      appBar: AppBar(
+        title: Text('菜谱信息', style: Theme.of(context).textTheme.titleLarge),
+        backgroundColor: Theme.of(context).scaffoldBackgroundColor,
+        leading: IconButton(
+          icon: Icon(Icons.arrow_back, color: colors.primary),
+          onPressed: () => Navigator.pop(context),
+        ),
+      ),
       body: SingleChildScrollView(
         child: Column(
           children: [