✨ Search hint

lib/screens/query.dart

@@ -15,7 +15,9 @@ class QueryScreen extends StatefulWidget {
 
 class _QueryScreenState extends State<QueryScreen> {
   bool _isLoading = false;
+  bool _hasApiKey = true;
 
+  int? _totalCount;
   List<FoodData> _foodData = List.empty();
 
   Future<void> _searchFood(String probe) async {
@@ -24,11 +26,15 @@ class _QueryScreenState extends State<QueryScreen> {
     setState(() => _isLoading = true);
 
     final FoodDataController data = Get.find();
-    if (data.getApiKey() == null) return;
+    if (data.getApiKey() == null) {
+      setState(() => _hasApiKey = false);
+      return;
+    }
 
     final result = await data.searchFood(probe);
 
     setState(() {
+      _totalCount = result.totalHits;
       _foodData = result.foods;
       _isLoading = false;
     });
@@ -48,6 +54,14 @@ class _QueryScreenState extends State<QueryScreen> {
       child: SafeArea(
         child: Column(
           children: [
+            if (!_hasApiKey)
+              Text('searchNoKeyHint'.tr).paddingSymmetric(vertical: 8)
+            else if (_totalCount != null)
+              Text('searchResultHint'
+                      .trParams({'count': _totalCount.toString()}))
+                  .paddingSymmetric(vertical: 8)
+            else
+              Text('searchHint'.tr).paddingSymmetric(vertical: 8),
             SearchBar(
               padding: const WidgetStatePropertyAll<EdgeInsets>(
                 EdgeInsets.symmetric(horizontal: 16.0),

lib/translations/zh_cn.dart

@@ -39,4 +39,7 @@ const i18nSimplifiedChinese = {
   'fdcApiCredit':
       'DietaryGuard 的食品数据来源于 U.S. Department of Agriculture, Agricultural Research Service, Beltsville Human Nutrition Research Center. FoodData Central. 在此感谢他们慷慨贡献的食品数据并发布在公有领域。',
   'loading': '加载中',
+  'searchHint': '在下方键入关键词来搜索',
+  'searchNoKeyHint': '无 API 令牌，请先在「设置」>「数据源」设置 API 密钥',
+  'searchResultHint': '共命中 @count 条记录（截取前 100 条）',
 };