fix(admin): 修复表格批量操作和搜索功能问题

1. 恢复账号管理批量操作栏缺失的功能按钮
   - 添加"本页全选"按钮支持批量选择当前页所有账号
   - 添加"清除已选"按钮快速清空已选账号列表
   - 在重构拆分组件时遗漏，现已恢复

2. 修复分组管理搜索功能仅搜索当前页的问题
   - 前端：移除本地过滤逻辑，改用后端搜索
   - 后端：添加 search 参数支持，搜索名称和描述字段
   - 支持不区分大小写的模糊匹配
   - 统一所有管理页面的搜索体验

frontend/src/api/admin/groups.ts

@@ -16,7 +16,7 @@ import type {
  * List all groups with pagination
  * @param page - Page number (default: 1)
  * @param pageSize - Items per page (default: 20)
- * @param filters - Optional filters (platform, status, is_exclusive)
+ * @param filters - Optional filters (platform, status, is_exclusive, search)
  * @returns Paginated list of groups
  */
 export async function list(
@@ -26,6 +26,7 @@ export async function list(
     platform?: GroupPlatform
     status?: 'active' | 'inactive'
     is_exclusive?: boolean
+    search?: string
   },
   options?: {
     signal?: AbortSignal

frontend/src/components/admin/account/AccountBulkActionsBar.vue

@@ -1,6 +1,23 @@
 <template>
-  <div v-if="selectedIds.length > 0" class="mb-4 flex items-center justify-between p-3 bg-primary-50 rounded-lg">
-    <span class="text-sm font-medium">{{ t('admin.accounts.bulkActions.selected', { count: selectedIds.length }) }}</span>
+  <div v-if="selectedIds.length > 0" class="mb-4 flex items-center justify-between p-3 bg-primary-50 rounded-lg dark:bg-primary-900/20">
+    <div class="flex flex-wrap items-center gap-2">
+      <span class="text-sm font-medium text-primary-900 dark:text-primary-100">
+        {{ t('admin.accounts.bulkActions.selected', { count: selectedIds.length }) }}
+      </span>
+      <button
+        @click="$emit('select-page')"
+        class="text-xs font-medium text-primary-700 hover:text-primary-800 dark:text-primary-300 dark:hover:text-primary-200"
+      >
+        {{ t('admin.accounts.bulkActions.selectCurrentPage') }}
+      </button>
+      <span class="text-gray-300 dark:text-primary-800">•</span>
+      <button
+        @click="$emit('clear')"
+        class="text-xs font-medium text-primary-700 hover:text-primary-800 dark:text-primary-300 dark:hover:text-primary-200"
+      >
+        {{ t('admin.accounts.bulkActions.clear') }}
+      </button>
+    </div>
     <div class="flex gap-2">
       <button @click="$emit('delete')" class="btn btn-danger btn-sm">{{ t('admin.accounts.bulkActions.delete') }}</button>
       <button @click="$emit('edit')" class="btn btn-primary btn-sm">{{ t('admin.accounts.bulkActions.edit') }}</button>
@@ -10,5 +27,5 @@
 
 <script setup lang="ts">
 import { useI18n } from 'vue-i18n'
-defineProps(['selectedIds']); defineEmits(['delete', 'edit']); const { t } = useI18n()
+defineProps(['selectedIds']); defineEmits(['delete', 'edit', 'clear', 'select-page']); const { t } = useI18n()
 </script>

frontend/src/views/admin/GroupsView.vue

@@ -16,6 +16,7 @@
                 type="text"
                 :placeholder="t('admin.groups.searchGroups')"
                 class="input pl-10"
+                @input="handleSearch"
               />
             </div>
           <Select
@@ -64,7 +65,7 @@
       </template>
 
       <template #table>
-        <DataTable :columns="columns" :data="displayedGroups" :loading="loading">
+        <DataTable :columns="columns" :data="groups" :loading="loading">
           <template #cell-name="{ value }">
             <span class="font-medium text-gray-900 dark:text-white">{{ value }}</span>
           </template>
@@ -932,16 +933,6 @@ const pagination = reactive({
 
 let abortController: AbortController | null = null
 
-const displayedGroups = computed(() => {
-  const q = searchQuery.value.trim().toLowerCase()
-  if (!q) return groups.value
-  return groups.value.filter((group) => {
-    const name = group.name?.toLowerCase?.() ?? ''
-    const description = group.description?.toLowerCase?.() ?? ''
-    return name.includes(q) || description.includes(q)
-  })
-})
-
 const showCreateModal = ref(false)
 const showEditModal = ref(false)
 const showDeleteDialog = ref(false)
@@ -1011,7 +1002,8 @@ const loadGroups = async () => {
     const response = await adminAPI.groups.list(pagination.page, pagination.page_size, {
       platform: (filters.platform as GroupPlatform) || undefined,
       status: filters.status as any,
-      is_exclusive: filters.is_exclusive ? filters.is_exclusive === 'true' : undefined
+      is_exclusive: filters.is_exclusive ? filters.is_exclusive === 'true' : undefined,
+      search: searchQuery.value.trim() || undefined
     }, { signal })
     if (signal.aborted) return
     groups.value = response.items
@@ -1030,6 +1022,15 @@ const loadGroups = async () => {
   }
 }
 
+let searchTimeout: ReturnType<typeof setTimeout>
+const handleSearch = () => {
+  clearTimeout(searchTimeout)
+  searchTimeout = setTimeout(() => {
+    pagination.page = 1
+    loadGroups()
+  }, 300)
+}
+
 const handlePageChange = (page: number) => {
   pagination.page = page
   loadGroups()