feat: 增加無障礙標籤及ARIA屬性以改善可訪問性

src/App.vue

@@ -42,6 +42,7 @@
           <v-tab v-for="tab in tabs" :key="tab.path" border="sm" :to="tab.path" :value="tab.path">
             {{ tab.title }}
             <v-btn
+              aria-label="關閉頁籤"
               class="pl-2"
               color="grey"
               density="compact"
@@ -56,7 +57,7 @@
           </v-tab>
         </v-tabs>
 
-        <div class="flex-grow-1 overflow-auto" style="min-height: 0">
+        <div class="flex-grow-1 overflow-auto" style="min-height: 0" tabindex="0">
           <router-view v-slot="{ Component }">
             <keep-alive>
               <component :is="Component" :key="route.fullPath" />