feat(admin): Add group filtering for account listings

- Add groupID parameter to ListAccounts and ListWithFilters methods
- Implement account filtering by group ID in repository query
- Add group query parameter parsing in account handler
- Update all ListAccounts/ListWithFilters call sites with groupID parameter
- Add group filter UI component to AccountTableFilters
- Add i18n translations for group filter label in English and Chinese
- Update API contract and test stubs to reflect new signature
- Enable filtering accounts by their assigned groups in admin panel

backend/internal/handler/admin/account_data.go

@@ -341,7 +341,7 @@ func (h *AccountHandler) listAccountsFiltered(ctx context.Context, platform, acc
 	pageSize := dataPageCap
 	var out []service.Account
 	for {
-		items, total, err := h.adminService.ListAccounts(ctx, page, pageSize, platform, accountType, status, search)
+		items, total, err := h.adminService.ListAccounts(ctx, page, pageSize, platform, accountType, status, search, 0)
 		if err != nil {
 			return nil, err
 		}

backend/internal/handler/admin/account_handler.go

@@ -156,7 +156,12 @@ func (h *AccountHandler) List(c *gin.Context) {
 		search = search[:100]
 	}
 
-	accounts, total, err := h.adminService.ListAccounts(c.Request.Context(), page, pageSize, platform, accountType, status, search)
+	var groupID int64
+	if groupIDStr := c.Query("group"); groupIDStr != "" {
+		groupID, _ = strconv.ParseInt(groupIDStr, 10, 64)
+	}
+
+	accounts, total, err := h.adminService.ListAccounts(c.Request.Context(), page, pageSize, platform, accountType, status, search, groupID)
 	if err != nil {
 		response.ErrorFrom(c, err)
 		return
@@ -1429,7 +1434,7 @@ func (h *AccountHandler) BatchRefreshTier(c *gin.Context) {
 	accounts := make([]*service.Account, 0)
 
 	if len(req.AccountIDs) == 0 {
-		allAccounts, _, err := h.adminService.ListAccounts(ctx, 1, 10000, "gemini", "oauth", "", "")
+		allAccounts, _, err := h.adminService.ListAccounts(ctx, 1, 10000, "gemini", "oauth", "", "", 0)
 		if err != nil {
 			response.ErrorFrom(c, err)
 			return

backend/internal/handler/admin/admin_service_stub_test.go

@@ -166,7 +166,7 @@ func (s *stubAdminService) GetGroupAPIKeys(ctx context.Context, groupID int64, p
 	return s.apiKeys, int64(len(s.apiKeys)), nil
 }
 
-func (s *stubAdminService) ListAccounts(ctx context.Context, page, pageSize int, platform, accountType, status, search string) ([]service.Account, int64, error) {
+func (s *stubAdminService) ListAccounts(ctx context.Context, page, pageSize int, platform, accountType, status, search string, groupID int64) ([]service.Account, int64, error) {
 	return s.accounts, int64(len(s.accounts)), nil
 }
 

backend/internal/repository/account_repo.go

@@ -435,10 +435,10 @@ func (r *accountRepository) Delete(ctx context.Context, id int64) error {
 }
 
 func (r *accountRepository) List(ctx context.Context, params pagination.PaginationParams) ([]service.Account, *pagination.PaginationResult, error) {
-	return r.ListWithFilters(ctx, params, "", "", "", "")
+	return r.ListWithFilters(ctx, params, "", "", "", "", 0)
 }
 
-func (r *accountRepository) ListWithFilters(ctx context.Context, params pagination.PaginationParams, platform, accountType, status, search string) ([]service.Account, *pagination.PaginationResult, error) {
+func (r *accountRepository) ListWithFilters(ctx context.Context, params pagination.PaginationParams, platform, accountType, status, search string, groupID int64) ([]service.Account, *pagination.PaginationResult, error) {
 	q := r.client.Account.Query()
 
 	if platform != "" {
@@ -458,6 +458,9 @@ func (r *accountRepository) ListWithFilters(ctx context.Context, params paginati
 	if search != "" {
 		q = q.Where(dbaccount.NameContainsFold(search))
 	}
+	if groupID > 0 {
+		q = q.Where(dbaccount.HasAccountGroupsWith(dbaccountgroup.GroupIDEQ(groupID)))
+	}
 
 	total, err := q.Count(ctx)
 	if err != nil {

backend/internal/repository/account_repo_integration_test.go

@@ -238,7 +238,7 @@ func (s *AccountRepoSuite) TestListWithFilters() {
 
 			tt.setup(client)
 
-			accounts, _, err := repo.ListWithFilters(ctx, pagination.PaginationParams{Page: 1, PageSize: 10}, tt.platform, tt.accType, tt.status, tt.search)
+			accounts, _, err := repo.ListWithFilters(ctx, pagination.PaginationParams{Page: 1, PageSize: 10}, tt.platform, tt.accType, tt.status, tt.search, 0)
 			s.Require().NoError(err)
 			s.Require().Len(accounts, tt.wantCount)
 			if tt.validate != nil {
@@ -305,7 +305,7 @@ func (s *AccountRepoSuite) TestPreload_And_VirtualFields() {
 	s.Require().Len(got.Groups, 1, "expected Groups to be populated")
 	s.Require().Equal(group.ID, got.Groups[0].ID)
 
-	accounts, page, err := s.repo.ListWithFilters(s.ctx, pagination.PaginationParams{Page: 1, PageSize: 10}, "", "", "", "acc")
+	accounts, page, err := s.repo.ListWithFilters(s.ctx, pagination.PaginationParams{Page: 1, PageSize: 10}, "", "", "", "acc", 0)
 	s.Require().NoError(err, "ListWithFilters")
 	s.Require().Equal(int64(1), page.Total)
 	s.Require().Len(accounts, 1)

backend/internal/server/api_contract_test.go

@@ -936,7 +936,7 @@ func (s *stubAccountRepo) List(ctx context.Context, params pagination.Pagination
 	return nil, nil, errors.New("not implemented")
 }
 
-func (s *stubAccountRepo) ListWithFilters(ctx context.Context, params pagination.PaginationParams, platform, accountType, status, search string) ([]service.Account, *pagination.PaginationResult, error) {
+func (s *stubAccountRepo) ListWithFilters(ctx context.Context, params pagination.PaginationParams, platform, accountType, status, search string, groupID int64) ([]service.Account, *pagination.PaginationResult, error) {
 	return nil, nil, errors.New("not implemented")
 }
 

backend/internal/service/account_service.go

@@ -32,7 +32,7 @@ type AccountRepository interface {
 	Delete(ctx context.Context, id int64) error
 
 	List(ctx context.Context, params pagination.PaginationParams) ([]Account, *pagination.PaginationResult, error)
-	ListWithFilters(ctx context.Context, params pagination.PaginationParams, platform, accountType, status, search string) ([]Account, *pagination.PaginationResult, error)
+	ListWithFilters(ctx context.Context, params pagination.PaginationParams, platform, accountType, status, search string, groupID int64) ([]Account, *pagination.PaginationResult, error)
 	ListByGroup(ctx context.Context, groupID int64) ([]Account, error)
 	ListActive(ctx context.Context) ([]Account, error)
 	ListByPlatform(ctx context.Context, platform string) ([]Account, error)

backend/internal/service/account_service_delete_test.go

@@ -75,7 +75,7 @@ func (s *accountRepoStub) List(ctx context.Context, params pagination.Pagination
 	panic("unexpected List call")
 }
 
-func (s *accountRepoStub) ListWithFilters(ctx context.Context, params pagination.PaginationParams, platform, accountType, status, search string) ([]Account, *pagination.PaginationResult, error) {
+func (s *accountRepoStub) ListWithFilters(ctx context.Context, params pagination.PaginationParams, platform, accountType, status, search string, groupID int64) ([]Account, *pagination.PaginationResult, error) {
 	panic("unexpected ListWithFilters call")
 }
 

backend/internal/service/admin_service.go

@@ -39,7 +39,7 @@ type AdminService interface {
 	UpdateGroupSortOrders(ctx context.Context, updates []GroupSortOrderUpdate) error
 
 	// Account management
-	ListAccounts(ctx context.Context, page, pageSize int, platform, accountType, status, search string) ([]Account, int64, error)
+	ListAccounts(ctx context.Context, page, pageSize int, platform, accountType, status, search string, groupID int64) ([]Account, int64, error)
 	GetAccount(ctx context.Context, id int64) (*Account, error)
 	GetAccountsByIDs(ctx context.Context, ids []int64) ([]*Account, error)
 	CreateAccount(ctx context.Context, input *CreateAccountInput) (*Account, error)
@@ -1021,9 +1021,9 @@ func (s *adminServiceImpl) UpdateGroupSortOrders(ctx context.Context, updates []
 }
 
 // Account management implementations
-func (s *adminServiceImpl) ListAccounts(ctx context.Context, page, pageSize int, platform, accountType, status, search string) ([]Account, int64, error) {
+func (s *adminServiceImpl) ListAccounts(ctx context.Context, page, pageSize int, platform, accountType, status, search string, groupID int64) ([]Account, int64, error) {
 	params := pagination.PaginationParams{Page: page, PageSize: pageSize}
-	accounts, result, err := s.accountRepo.ListWithFilters(ctx, params, platform, accountType, status, search)
+	accounts, result, err := s.accountRepo.ListWithFilters(ctx, params, platform, accountType, status, search, groupID)
 	if err != nil {
 		return nil, 0, err
 	}

backend/internal/service/admin_service_search_test.go

@@ -24,7 +24,7 @@ type accountRepoStubForAdminList struct {
 	listWithFiltersErr      error
 }
 
-func (s *accountRepoStubForAdminList) ListWithFilters(_ context.Context, params pagination.PaginationParams, platform, accountType, status, search string) ([]Account, *pagination.PaginationResult, error) {
+func (s *accountRepoStubForAdminList) ListWithFilters(_ context.Context, params pagination.PaginationParams, platform, accountType, status, search string, groupID int64) ([]Account, *pagination.PaginationResult, error) {
 	s.listWithFiltersCalls++
 	s.listWithFiltersParams = params
 	s.listWithFiltersPlatform = platform
@@ -168,7 +168,7 @@ func TestAdminService_ListAccounts_WithSearch(t *testing.T) {
 		}
 		svc := &adminServiceImpl{accountRepo: repo}
 
-		accounts, total, err := svc.ListAccounts(context.Background(), 1, 20, PlatformGemini, AccountTypeOAuth, StatusActive, "acc")
+		accounts, total, err := svc.ListAccounts(context.Background(), 1, 20, PlatformGemini, AccountTypeOAuth, StatusActive, "acc", 0)
 		require.NoError(t, err)
 		require.Equal(t, int64(10), total)
 		require.Equal(t, []Account{{ID: 1, Name: "acc"}}, accounts)

backend/internal/service/gateway_multiplatform_test.go

@@ -87,7 +87,7 @@ func (m *mockAccountRepoForPlatform) Delete(ctx context.Context, id int64) error
 func (m *mockAccountRepoForPlatform) List(ctx context.Context, params pagination.PaginationParams) ([]Account, *pagination.PaginationResult, error) {
 	return nil, nil, nil
 }
-func (m *mockAccountRepoForPlatform) ListWithFilters(ctx context.Context, params pagination.PaginationParams, platform, accountType, status, search string) ([]Account, *pagination.PaginationResult, error) {
+func (m *mockAccountRepoForPlatform) ListWithFilters(ctx context.Context, params pagination.PaginationParams, platform, accountType, status, search string, groupID int64) ([]Account, *pagination.PaginationResult, error) {
 	return nil, nil, nil
 }
 func (m *mockAccountRepoForPlatform) ListByGroup(ctx context.Context, groupID int64) ([]Account, error) {

backend/internal/service/gemini_multiplatform_test.go

@@ -74,7 +74,7 @@ func (m *mockAccountRepoForGemini) Delete(ctx context.Context, id int64) error
 func (m *mockAccountRepoForGemini) List(ctx context.Context, params pagination.PaginationParams) ([]Account, *pagination.PaginationResult, error) {
 	return nil, nil, nil
 }
-func (m *mockAccountRepoForGemini) ListWithFilters(ctx context.Context, params pagination.PaginationParams, platform, accountType, status, search string) ([]Account, *pagination.PaginationResult, error) {
+func (m *mockAccountRepoForGemini) ListWithFilters(ctx context.Context, params pagination.PaginationParams, platform, accountType, status, search string, groupID int64) ([]Account, *pagination.PaginationResult, error) {
 	return nil, nil, nil
 }
 func (m *mockAccountRepoForGemini) ListByGroup(ctx context.Context, groupID int64) ([]Account, error) {

backend/internal/service/ops_concurrency.go

@@ -24,7 +24,7 @@ func (s *OpsService) listAllAccountsForOps(ctx context.Context, platformFilter s
 		accounts, pageInfo, err := s.accountRepo.ListWithFilters(ctx, pagination.PaginationParams{
 			Page:     page,
 			PageSize: opsAccountsPageSize,
-		}, platformFilter, "", "", "")
+		}, platformFilter, "", "", "", 0)
 		if err != nil {
 			return nil, err
 		}

frontend/src/api/admin/accounts.ts

@@ -32,6 +32,7 @@ export async function list(
     platform?: string
     type?: string
     status?: string
+    group?: string
     search?: string
   },
   options?: {

frontend/src/components/account/AccountGroupsCell.vue

@@ -41,7 +41,7 @@
         >
           <div class="mb-2 flex items-center justify-between">
             <span class="text-xs font-medium text-gray-500 dark:text-gray-400">
-              {{ t('admin.accounts.allGroups', { count: groups.length }) }}
+              {{ t('admin.accounts.groupCountTotal', { count: groups.length }) }}
             </span>
             <button
               @click="showPopover = false"

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

@@ -10,16 +10,21 @@
     <Select :model-value="filters.platform" class="w-40" :options="pOpts" @update:model-value="updatePlatform" @change="$emit('change')" />
     <Select :model-value="filters.type" class="w-40" :options="tOpts" @update:model-value="updateType" @change="$emit('change')" />
     <Select :model-value="filters.status" class="w-40" :options="sOpts" @update:model-value="updateStatus" @change="$emit('change')" />
+    <Select :model-value="filters.group" class="w-40" :options="gOpts" @update:model-value="updateGroup" @change="$emit('change')" />
   </div>
 </template>
 
 <script setup lang="ts">
 import { computed } from 'vue'; import { useI18n } from 'vue-i18n'; import Select from '@/components/common/Select.vue'; import SearchInput from '@/components/common/SearchInput.vue'
-const props = defineProps(['searchQuery', 'filters']); const emit = defineEmits(['update:searchQuery', 'update:filters', 'change']); const { t } = useI18n()
+import type { AdminGroup } from '@/types'
+const props = defineProps<{ searchQuery: string; filters: Record<string, any>; groups?: AdminGroup[] }>()
+const emit = defineEmits(['update:searchQuery', 'update:filters', 'change']); const { t } = useI18n()
 const updatePlatform = (value: string | number | boolean | null) => { emit('update:filters', { ...props.filters, platform: value }) }
 const updateType = (value: string | number | boolean | null) => { emit('update:filters', { ...props.filters, type: value }) }
 const updateStatus = (value: string | number | boolean | null) => { emit('update:filters', { ...props.filters, status: value }) }
+const updateGroup = (value: string | number | boolean | null) => { emit('update:filters', { ...props.filters, group: value }) }
 const pOpts = computed(() => [{ value: '', label: t('admin.accounts.allPlatforms') }, { value: 'anthropic', label: 'Anthropic' }, { value: 'openai', label: 'OpenAI' }, { value: 'gemini', label: 'Gemini' }, { value: 'antigravity', label: 'Antigravity' }])
 const tOpts = computed(() => [{ value: '', label: t('admin.accounts.allTypes') }, { value: 'oauth', label: t('admin.accounts.oauthType') }, { value: 'setup-token', label: t('admin.accounts.setupToken') }, { value: 'apikey', label: t('admin.accounts.apiKey') }])
 const sOpts = computed(() => [{ value: '', label: t('admin.accounts.allStatus') }, { value: 'active', label: t('admin.accounts.status.active') }, { value: 'inactive', label: t('admin.accounts.status.inactive') }, { value: 'error', label: t('admin.accounts.status.error') }, { value: 'rate_limited', label: t('admin.accounts.status.rateLimited') }])
+const gOpts = computed(() => [{ value: '', label: t('admin.accounts.allGroups') }, ...(props.groups || []).map(g => ({ value: String(g.id), label: g.name }))])
 </script>

frontend/src/i18n/locales/en.ts

@@ -1335,6 +1335,7 @@ export default {
       allPlatforms: 'All Platforms',
       allTypes: 'All Types',
       allStatus: 'All Status',
+      allGroups: 'All Groups',
       oauthType: 'OAuth',
       setupToken: 'Setup Token',
       apiKey: 'API Key',
@@ -1344,7 +1345,7 @@ export default {
       schedulableEnabled: 'Scheduling enabled',
       schedulableDisabled: 'Scheduling disabled',
       failedToToggleSchedulable: 'Failed to toggle scheduling status',
-      allGroups: '{count} groups total',
+      groupCountTotal: '{count} groups total',
       platforms: {
         anthropic: 'Anthropic',
         claude: 'Claude',

frontend/src/i18n/locales/zh.ts

@@ -1426,6 +1426,7 @@ export default {
       allPlatforms: '全部平台',
       allTypes: '全部类型',
       allStatus: '全部状态',
+      allGroups: '全部分组',
       oauthType: 'OAuth',
       // Schedulable toggle
       schedulable: '参与调度',
@@ -1433,7 +1434,7 @@ export default {
       schedulableEnabled: '调度已开启',
       schedulableDisabled: '调度已关闭',
       failedToToggleSchedulable: '切换调度状态失败',
-      allGroups: '共 {count} 个分组',
+      groupCountTotal: '共 {count} 个分组',
       columns: {
         name: '名称',
         platformType: '平台/类型',

frontend/src/views/admin/AccountsView.vue

@@ -6,6 +6,7 @@
           <AccountTableFilters
             v-model:searchQuery="params.search"
             :filters="params"
+            :groups="groups"
             @update:filters="(newFilters) => Object.assign(params, newFilters)"
             @change="debouncedReload"
             @update:searchQuery="debouncedReload"
@@ -439,7 +440,7 @@ const isColumnVisible = (key: string) => !hiddenColumns.has(key)
 
 const { items: accounts, loading, params, pagination, load, reload, debouncedReload, handlePageChange, handlePageSizeChange } = useTableLoader<Account, any>({
   fetchFn: adminAPI.accounts.list,
-  initialParams: { platform: '', type: '', status: '', search: '' }
+  initialParams: { platform: '', type: '', status: '', group: '', search: '' }
 })
 
 const isAnyModalOpen = computed(() => {