mod: 无障碍语义适配

lib/pages/history/view.dart

@@ -76,6 +76,7 @@ class _HistoryPageState extends State<HistoryPage> {
           ),
           actions: [
             IconButton(
+              tooltip: '搜索',
               onPressed: () => Get.toNamed('/historySearch'),
               icon: const Icon(Icons.search_outlined),
             ),
@@ -129,6 +130,7 @@ class _HistoryPageState extends State<HistoryPage> {
           titleSpacing: 0,
           centerTitle: false,
           leading: IconButton(
+            tooltip: '取消',
             onPressed: () {
               _historyController.enableMultiple.value = false;
               for (var item in _historyController.historyList) {

lib/pages/history/widgets/item.dart

@@ -230,6 +230,7 @@ class HistoryItem extends StatelessWidget {
                                             const Duration(milliseconds: 250),
                                         curve: Curves.easeInOut,
                                         child: IconButton(
+                                          tooltip: '取消选择',
                                           style: ButtonStyle(
                                             padding: MaterialStateProperty.all(
                                                 EdgeInsets.zero),