mod: 无障碍语义适配

lib/pages/search/controller.dart

@@ -64,7 +64,10 @@ class SSearchController extends GetxController {
   void submit() {
     // ignore: unrelated_type_equality_checks
     if (searchKeyWord == '') {
-      return;
+      if (hintText == ''){
+        return;
+      }
+      searchKeyWord.value = hintText;
     }
     List arr = historyCacheList.where((e) => e != searchKeyWord.value).toList();
     arr.insert(0, searchKeyWord.value);

lib/pages/search/view.dart

@@ -53,6 +53,7 @@ class _SearchPageState extends State<SearchPage> with RouteAware {
         titleSpacing: 0,
         actions: [
           IconButton(
+            tooltip: '搜索',
             onPressed: () => _searchController.submit(),
             icon: const Icon(CupertinoIcons.search, size: 22),
           ),
@@ -69,6 +70,7 @@ class _SearchPageState extends State<SearchPage> with RouteAware {
               hintText: _searchController.hintText,
               border: InputBorder.none,
               suffixIcon: IconButton(
+                tooltip: '清空',
                 icon: Icon(
                   Icons.clear,
                   size: 22,