修复首页地图显示问题和版本管理页面错误

frontend/src/pages/admin/versions/create.vue

@@ -477,7 +477,7 @@ watch(() => formData.value.application_id, (newAppId) => {
                     <UiSelectValue :placeholder="t('admin.versions.createForm.baseVersionPlaceholder')" />
                   </UiSelectTrigger>
                   <UiSelectContent>
-                    <UiSelectItem value="">
+                    <UiSelectItem value="__none__">
                       {{ t('admin.versions.createForm.noBaseVersion') }}
                     </UiSelectItem>
                     <UiSelectItem

frontend/src/pages/admin/versions/index.vue

@@ -260,7 +260,7 @@ watch([appFilter, strategyFilter, methodFilter, searchFilter], () => {
           </UiCardHeader>
           <UiCardContent>
             <div class="text-2xl font-bold">
-              {{ filteredVersions.length }}
+              {{ versions.length }}
             </div>
           </UiCardContent>
         </UiCard>
@@ -302,7 +302,7 @@ watch([appFilter, strategyFilter, methodFilter, searchFilter], () => {
           </UiCardHeader>
           <UiCardContent>
             <div class="text-2xl font-bold">
-              {{ new Set(filteredVersions.map(v => v.application_id)).size }}
+              {{ new Set(versions.map(v => v.application_id)).size }}
             </div>
           </UiCardContent>
         </UiCard>