feat: 分组管理页面新增专属倍率管理

- 后端新增 GET /admin/groups/:id/rate-multipliers API
- 前端新增 GroupRateMultipliersModal 组件，支持查看/添加/修改/删除用户专属倍率
- 分组列表操作列新增"专属倍率"按钮
- 修复 antigravity_gateway_service_test.go 参数不匹配的预存问题

backend/internal/handler/admin/admin_service_stub_test.go

@@ -175,6 +175,10 @@ func (s *stubAdminService) GetGroupAPIKeys(ctx context.Context, groupID int64, p
 	return s.apiKeys, int64(len(s.apiKeys)), nil
 }
 
+func (s *stubAdminService) GetGroupRateMultipliers(_ context.Context, _ int64) ([]service.UserGroupRateEntry, error) {
+	return nil, nil
+}
+
 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/handler/admin/group_handler.go

@@ -339,6 +339,27 @@ func (h *GroupHandler) GetGroupAPIKeys(c *gin.Context) {
 	response.Paginated(c, outKeys, total, page, pageSize)
 }
 
+// GetGroupRateMultipliers handles getting rate multipliers for users in a group
+// GET /api/v1/admin/groups/:id/rate-multipliers
+func (h *GroupHandler) GetGroupRateMultipliers(c *gin.Context) {
+	groupID, err := strconv.ParseInt(c.Param("id"), 10, 64)
+	if err != nil {
+		response.BadRequest(c, "Invalid group ID")
+		return
+	}
+
+	entries, err := h.adminService.GetGroupRateMultipliers(c.Request.Context(), groupID)
+	if err != nil {
+		response.ErrorFrom(c, err)
+		return
+	}
+
+	if entries == nil {
+		entries = []service.UserGroupRateEntry{}
+	}
+	response.Success(c, entries)
+}
+
 // UpdateSortOrderRequest represents the request to update group sort orders
 type UpdateSortOrderRequest struct {
 	Updates []struct {

backend/internal/repository/user_group_rate_repo.go

@@ -95,6 +95,35 @@ func (r *userGroupRateRepository) GetByUserIDs(ctx context.Context, userIDs []in
 	return result, nil
 }
 
+// GetByGroupID 获取指定分组下所有用户的专属倍率
+func (r *userGroupRateRepository) GetByGroupID(ctx context.Context, groupID int64) ([]service.UserGroupRateEntry, error) {
+	query := `
+		SELECT ugr.user_id, u.email, ugr.rate_multiplier
+		FROM user_group_rate_multipliers ugr
+		JOIN users u ON u.id = ugr.user_id
+		WHERE ugr.group_id = $1
+		ORDER BY ugr.user_id
+	`
+	rows, err := r.sql.QueryContext(ctx, query, groupID)
+	if err != nil {
+		return nil, err
+	}
+	defer func() { _ = rows.Close() }()
+
+	var result []service.UserGroupRateEntry
+	for rows.Next() {
+		var entry service.UserGroupRateEntry
+		if err := rows.Scan(&entry.UserID, &entry.UserEmail, &entry.RateMultiplier); err != nil {
+			return nil, err
+		}
+		result = append(result, entry)
+	}
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+	return result, nil
+}
+
 // GetByUserAndGroup 获取用户在特定分组的专属倍率
 func (r *userGroupRateRepository) GetByUserAndGroup(ctx context.Context, userID, groupID int64) (*float64, error) {
 	query := `SELECT rate_multiplier FROM user_group_rate_multipliers WHERE user_id = $1 AND group_id = $2`

backend/internal/server/routes/admin.go

@@ -228,6 +228,7 @@ func registerGroupRoutes(admin *gin.RouterGroup, h *handler.Handlers) {
 		groups.PUT("/:id", h.Admin.Group.Update)
 		groups.DELETE("/:id", h.Admin.Group.Delete)
 		groups.GET("/:id/stats", h.Admin.Group.GetStats)
+		groups.GET("/:id/rate-multipliers", h.Admin.Group.GetGroupRateMultipliers)
 		groups.GET("/:id/api-keys", h.Admin.Group.GetGroupAPIKeys)
 	}
 }

backend/internal/service/admin_service.go

@@ -42,6 +42,7 @@ type AdminService interface {
 	UpdateGroup(ctx context.Context, id int64, input *UpdateGroupInput) (*Group, error)
 	DeleteGroup(ctx context.Context, id int64) error
 	GetGroupAPIKeys(ctx context.Context, groupID int64, page, pageSize int) ([]APIKey, int64, error)
+	GetGroupRateMultipliers(ctx context.Context, groupID int64) ([]UserGroupRateEntry, error)
 	UpdateGroupSortOrders(ctx context.Context, updates []GroupSortOrderUpdate) error
 
 	// API Key management (admin)
@@ -1263,6 +1264,13 @@ func (s *adminServiceImpl) GetGroupAPIKeys(ctx context.Context, groupID int64, p
 	return keys, result.Total, nil
 }
 
+func (s *adminServiceImpl) GetGroupRateMultipliers(ctx context.Context, groupID int64) ([]UserGroupRateEntry, error) {
+	if s.userGroupRateRepo == nil {
+		return nil, nil
+	}
+	return s.userGroupRateRepo.GetByGroupID(ctx, groupID)
+}
+
 func (s *adminServiceImpl) UpdateGroupSortOrders(ctx context.Context, updates []GroupSortOrderUpdate) error {
 	return s.groupRepo.UpdateSortOrders(ctx, updates)
 }

backend/internal/service/admin_service_list_users_test.go

@@ -68,6 +68,10 @@ func (s *userGroupRateRepoStubForListUsers) SyncUserGroupRates(_ context.Context
 	panic("unexpected SyncUserGroupRates call")
 }
 
+func (s *userGroupRateRepoStubForListUsers) GetByGroupID(_ context.Context, groupID int64) ([]UserGroupRateEntry, error) {
+	panic("unexpected GetByGroupID call")
+}
+
 func (s *userGroupRateRepoStubForListUsers) DeleteByGroupID(_ context.Context, groupID int64) error {
 	panic("unexpected DeleteByGroupID call")
 }

backend/internal/service/antigravity_gateway_service_test.go

@@ -1022,7 +1022,7 @@ func TestHandleClaudeStreamingResponse_EmptyStream(t *testing.T) {
 		fmt.Fprintln(pw, "")
 	}()
 
-	_, err := svc.handleClaudeStreamingResponse(c, resp, time.Now(), "claude-sonnet-4-5")
+	_, err := svc.handleClaudeStreamingResponse(c, resp, time.Now(), "claude-sonnet-4-5", 0)
 	_ = pr.Close()
 
 	// 应当返回 UpstreamFailoverError 而非 nil，以便上层触发 failover

backend/internal/service/user_group_rate.go

@@ -2,6 +2,13 @@ package service
 
 import "context"
 
+// UserGroupRateEntry 分组下用户专属倍率条目
+type UserGroupRateEntry struct {
+	UserID         int64   `json:"user_id"`
+	UserEmail      string  `json:"user_email"`
+	RateMultiplier float64 `json:"rate_multiplier"`
+}
+
 // UserGroupRateRepository 用户专属分组倍率仓储接口
 // 允许管理员为特定用户设置分组的专属计费倍率，覆盖分组默认倍率
 type UserGroupRateRepository interface {
@@ -13,6 +20,9 @@ type UserGroupRateRepository interface {
 	// 如果未设置专属倍率，返回 nil
 	GetByUserAndGroup(ctx context.Context, userID, groupID int64) (*float64, error)
 
+	// GetByGroupID 获取指定分组下所有用户的专属倍率
+	GetByGroupID(ctx context.Context, groupID int64) ([]UserGroupRateEntry, error)
+
 	// SyncUserGroupRates 同步用户的分组专属倍率
 	// rates: map[groupID]*rateMultiplier，nil 表示删除该分组的专属倍率
 	SyncUserGroupRates(ctx context.Context, userID int64, rates map[int64]*float64) error

frontend/src/api/admin/groups.ts

@@ -153,6 +153,27 @@ export async function getGroupApiKeys(
   return data
 }
 
+/**
+ * Rate multiplier entry for a user in a group
+ */
+export interface GroupRateMultiplierEntry {
+  user_id: number
+  user_email: string
+  rate_multiplier: number
+}
+
+/**
+ * Get rate multipliers for users in a group
+ * @param id - Group ID
+ * @returns List of user rate multiplier entries
+ */
+export async function getGroupRateMultipliers(id: number): Promise<GroupRateMultiplierEntry[]> {
+  const { data } = await apiClient.get<GroupRateMultiplierEntry[]>(
+    `/admin/groups/${id}/rate-multipliers`
+  )
+  return data
+}
+
 /**
  * Update group sort orders
  * @param updates - Array of { id, sort_order } objects
@@ -178,6 +199,7 @@ export const groupsAPI = {
   toggleStatus,
   getStats,
   getGroupApiKeys,
+  getGroupRateMultipliers,
   updateSortOrder
 }
 

frontend/src/components/admin/group/GroupRateMultipliersModal.vue

@@ -0,0 +1,271 @@
+<template>
+  <BaseDialog :show="show" :title="t('admin.groups.rateMultipliersTitle')" width="normal" @close="$emit('close')">
+    <div v-if="group" class="space-y-5">
+      <!-- 分组信息 -->
+      <div class="flex flex-wrap items-center gap-3 rounded-lg bg-gray-50 px-4 py-3 text-sm dark:bg-dark-700">
+        <span class="font-medium text-gray-900 dark:text-white">{{ group.name }}</span>
+        <span class="text-gray-400">|</span>
+        <span class="text-gray-600 dark:text-gray-400">{{ t('admin.groups.platforms.' + group.platform) }}</span>
+        <span class="text-gray-400">|</span>
+        <span class="text-gray-600 dark:text-gray-400">
+          {{ t('admin.groups.columns.rateMultiplier') }}: {{ group.rate_multiplier }}x
+        </span>
+      </div>
+
+      <!-- 添加用户 -->
+      <div class="rounded-lg border border-gray-200 p-4 dark:border-dark-600">
+        <h4 class="mb-3 text-sm font-medium text-gray-700 dark:text-gray-300">
+          {{ t('admin.groups.addUserRate') }}
+        </h4>
+        <div class="flex items-end gap-3">
+          <div class="relative flex-1">
+            <input
+              v-model="searchQuery"
+              type="text"
+              class="input w-full"
+              :placeholder="t('admin.groups.searchUserPlaceholder')"
+              @input="handleSearchUsers"
+              @focus="showDropdown = true"
+            />
+            <!-- 搜索结果下拉 -->
+            <div
+              v-if="showDropdown && searchResults.length > 0"
+              class="absolute left-0 right-0 top-full z-10 mt-1 max-h-48 overflow-y-auto rounded-lg border border-gray-200 bg-white shadow-lg dark:border-dark-500 dark:bg-dark-700"
+            >
+              <button
+                v-for="user in searchResults"
+                :key="user.id"
+                type="button"
+                class="flex w-full items-center px-3 py-2 text-left text-sm hover:bg-gray-50 dark:hover:bg-dark-600"
+                @click="selectUser(user)"
+              >
+                <span class="text-gray-900 dark:text-white">{{ user.email }}</span>
+              </button>
+            </div>
+          </div>
+          <div class="w-28">
+            <input
+              v-model.number="newRate"
+              type="number"
+              step="0.001"
+              min="0"
+              class="hide-spinner input w-full"
+              placeholder="1.0"
+            />
+          </div>
+          <button
+            type="button"
+            class="btn btn-primary shrink-0"
+            :disabled="!selectedUser || !newRate || addingRate"
+            @click="handleAddRate"
+          >
+            <Icon v-if="addingRate" name="refresh" size="sm" class="mr-1 animate-spin" />
+            {{ t('common.add') }}
+          </button>
+        </div>
+      </div>
+
+      <!-- 加载状态 -->
+      <div v-if="loading" class="flex justify-center py-8">
+        <svg class="h-8 w-8 animate-spin text-primary-500" fill="none" viewBox="0 0 24 24">
+          <circle class="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" stroke-width="4"></circle>
+          <path class="opacity-75" fill="currentColor" d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4zm2 5.291A7.962 7.962 0 014 12H0c0 3.042 1.135 5.824 3 7.938l3-2.647z"></path>
+        </svg>
+      </div>
+
+      <!-- 已设置的用户列表 -->
+      <div v-else>
+        <h4 class="mb-3 text-sm font-medium text-gray-700 dark:text-gray-300">
+          {{ t('admin.groups.rateMultipliers') }} ({{ entries.length }})
+        </h4>
+
+        <div v-if="entries.length === 0" class="py-8 text-center text-sm text-gray-400 dark:text-gray-500">
+          {{ t('admin.groups.noRateMultipliers') }}
+        </div>
+
+        <div v-else class="space-y-2">
+          <div
+            v-for="entry in entries"
+            :key="entry.user_id"
+            class="flex items-center gap-3 rounded-lg border border-gray-200 px-4 py-3 dark:border-dark-600"
+          >
+            <span class="flex-1 text-sm text-gray-900 dark:text-white">{{ entry.user_email }}</span>
+            <input
+              type="number"
+              step="0.001"
+              min="0"
+              :value="entry.rate_multiplier"
+              class="hide-spinner w-24 rounded-lg border border-gray-300 bg-white px-3 py-2 text-sm font-medium transition-colors focus:border-primary-500 focus:outline-none focus:ring-2 focus:ring-primary-500/20 dark:border-dark-500 dark:bg-dark-700 dark:focus:border-primary-500"
+              @blur="handleUpdateRate(entry, ($event.target as HTMLInputElement).value)"
+              @keydown.enter="($event.target as HTMLInputElement).blur()"
+            />
+            <button
+              type="button"
+              class="rounded-lg p-1.5 text-gray-400 transition-colors hover:bg-red-50 hover:text-red-600 dark:hover:bg-red-900/20 dark:hover:text-red-400"
+              @click="handleDeleteRate(entry)"
+            >
+              <Icon name="trash" size="sm" />
+            </button>
+          </div>
+        </div>
+      </div>
+    </div>
+  </BaseDialog>
+</template>
+
+<script setup lang="ts">
+import { ref, watch } from 'vue'
+import { useI18n } from 'vue-i18n'
+import { useAppStore } from '@/stores/app'
+import { adminAPI } from '@/api/admin'
+import type { GroupRateMultiplierEntry } from '@/api/admin/groups'
+import type { AdminGroup, AdminUser } from '@/types'
+import BaseDialog from '@/components/common/BaseDialog.vue'
+import Icon from '@/components/icons/Icon.vue'
+
+const props = defineProps<{
+  show: boolean
+  group: AdminGroup | null
+}>()
+
+const emit = defineEmits<{
+  close: []
+  success: []
+}>()
+
+const { t } = useI18n()
+const appStore = useAppStore()
+
+const loading = ref(false)
+const entries = ref<GroupRateMultiplierEntry[]>([])
+const searchQuery = ref('')
+const searchResults = ref<AdminUser[]>([])
+const showDropdown = ref(false)
+const selectedUser = ref<AdminUser | null>(null)
+const newRate = ref<number | null>(null)
+const addingRate = ref(false)
+
+let searchTimeout: ReturnType<typeof setTimeout>
+
+const loadEntries = async () => {
+  if (!props.group) return
+  loading.value = true
+  try {
+    entries.value = await adminAPI.groups.getGroupRateMultipliers(props.group.id)
+  } catch (error) {
+    appStore.showError(t('admin.groups.failedToLoad'))
+    console.error('Error loading group rate multipliers:', error)
+  } finally {
+    loading.value = false
+  }
+}
+
+watch(() => props.show, (val) => {
+  if (val && props.group) {
+    loadEntries()
+    searchQuery.value = ''
+    searchResults.value = []
+    selectedUser.value = null
+    newRate.value = null
+  }
+})
+
+const handleSearchUsers = () => {
+  clearTimeout(searchTimeout)
+  selectedUser.value = null
+  if (!searchQuery.value.trim()) {
+    searchResults.value = []
+    showDropdown.value = false
+    return
+  }
+  searchTimeout = setTimeout(async () => {
+    try {
+      const res = await adminAPI.users.list(1, 10, { search: searchQuery.value.trim() })
+      searchResults.value = res.items
+      showDropdown.value = true
+    } catch {
+      searchResults.value = []
+    }
+  }, 300)
+}
+
+const selectUser = (user: AdminUser) => {
+  selectedUser.value = user
+  searchQuery.value = user.email
+  showDropdown.value = false
+  searchResults.value = []
+}
+
+const handleAddRate = async () => {
+  if (!selectedUser.value || !newRate.value || !props.group) return
+  addingRate.value = true
+  try {
+    await adminAPI.users.update(selectedUser.value.id, {
+      group_rates: { [props.group.id]: newRate.value }
+    })
+    appStore.showSuccess(t('admin.groups.rateAdded'))
+    searchQuery.value = ''
+    selectedUser.value = null
+    newRate.value = null
+    await loadEntries()
+    emit('success')
+  } catch (error) {
+    appStore.showError(t('admin.groups.failedToSave'))
+    console.error('Error adding rate multiplier:', error)
+  } finally {
+    addingRate.value = false
+  }
+}
+
+const handleUpdateRate = async (entry: GroupRateMultiplierEntry, value: string) => {
+  if (!props.group) return
+  const numValue = parseFloat(value)
+  if (isNaN(numValue) || numValue === entry.rate_multiplier) return
+  try {
+    await adminAPI.users.update(entry.user_id, {
+      group_rates: { [props.group.id]: numValue }
+    })
+    appStore.showSuccess(t('admin.groups.rateUpdated'))
+    await loadEntries()
+    emit('success')
+  } catch (error) {
+    appStore.showError(t('admin.groups.failedToSave'))
+    console.error('Error updating rate multiplier:', error)
+  }
+}
+
+const handleDeleteRate = async (entry: GroupRateMultiplierEntry) => {
+  if (!props.group) return
+  try {
+    await adminAPI.users.update(entry.user_id, {
+      group_rates: { [props.group.id]: null }
+    })
+    appStore.showSuccess(t('admin.groups.rateDeleted'))
+    await loadEntries()
+    emit('success')
+  } catch (error) {
+    appStore.showError(t('admin.groups.failedToSave'))
+    console.error('Error deleting rate multiplier:', error)
+  }
+}
+
+// 点击外部关闭下拉
+const handleClickOutside = () => {
+  showDropdown.value = false
+}
+
+if (typeof document !== 'undefined') {
+  document.addEventListener('click', handleClickOutside)
+}
+</script>
+
+<style scoped>
+.hide-spinner::-webkit-outer-spin-button,
+.hide-spinner::-webkit-inner-spin-button {
+  -webkit-appearance: none;
+  margin: 0;
+}
+.hide-spinner {
+  -moz-appearance: textfield;
+}
+</style>

frontend/src/i18n/locales/en.ts

@@ -1409,6 +1409,14 @@ export default {
       failedToUpdate: 'Failed to update group',
       failedToDelete: 'Failed to delete group',
       nameRequired: 'Please enter group name',
+      rateMultipliers: 'Rate Multipliers',
+      rateMultipliersTitle: 'Group Rate Multipliers',
+      addUserRate: 'Add User Rate Multiplier',
+      searchUserPlaceholder: 'Search user email...',
+      noRateMultipliers: 'No user rate multipliers configured',
+      rateUpdated: 'Rate multiplier updated',
+      rateDeleted: 'Rate multiplier removed',
+      rateAdded: 'Rate multiplier added',
       platforms: {
         all: 'All Platforms',
         anthropic: 'Anthropic',

frontend/src/i18n/locales/zh.ts

@@ -1508,6 +1508,14 @@ export default {
       failedToCreate: '创建分组失败',
       failedToUpdate: '更新分组失败',
       nameRequired: '请输入分组名称',
+      rateMultipliers: '专属倍率',
+      rateMultipliersTitle: '分组专属倍率管理',
+      addUserRate: '添加用户专属倍率',
+      searchUserPlaceholder: '搜索用户邮箱...',
+      noRateMultipliers: '暂无用户设置了专属倍率',
+      rateUpdated: '专属倍率已更新',
+      rateDeleted: '专属倍率已删除',
+      rateAdded: '专属倍率已添加',
       subscription: {
         title: '订阅设置',
         type: '计费类型',

frontend/src/views/admin/GroupsView.vue

@@ -181,6 +181,13 @@
                 <Icon name="edit" size="sm" />
                 <span class="text-xs">{{ t('common.edit') }}</span>
               </button>
+              <button
+                @click="handleRateMultipliers(row)"
+                class="flex flex-col items-center gap-0.5 rounded-lg p-1.5 text-gray-500 transition-colors hover:bg-gray-100 hover:text-purple-600 dark:hover:bg-dark-700 dark:hover:text-purple-400"
+              >
+                <Icon name="dollar" size="sm" />
+                <span class="text-xs">{{ t('admin.groups.rateMultipliers') }}</span>
+              </button>
               <button
                 @click="handleDelete(row)"
                 class="flex flex-col items-center gap-0.5 rounded-lg p-1.5 text-gray-500 transition-colors hover:bg-red-50 hover:text-red-600 dark:hover:bg-red-900/20 dark:hover:text-red-400"
@@ -1879,6 +1886,14 @@
         </div>
       </template>
     </BaseDialog>
+
+    <!-- Group Rate Multipliers Modal -->
+    <GroupRateMultipliersModal
+      :show="showRateMultipliersModal"
+      :group="rateMultipliersGroup"
+      @close="showRateMultipliersModal = false"
+      @success="loadGroups"
+    />
   </AppLayout>
 </template>
 
@@ -1900,6 +1915,7 @@ import EmptyState from '@/components/common/EmptyState.vue'
 import Select from '@/components/common/Select.vue'
 import PlatformIcon from '@/components/common/PlatformIcon.vue'
 import Icon from '@/components/icons/Icon.vue'
+import GroupRateMultipliersModal from '@/components/admin/group/GroupRateMultipliersModal.vue'
 import { VueDraggable } from 'vue-draggable-plus'
 import { createStableObjectKeyResolver } from '@/utils/stableObjectKey'
 import { useKeyedDebouncedSearch } from '@/composables/useKeyedDebouncedSearch'
@@ -2074,6 +2090,8 @@ const submitting = ref(false)
 const sortSubmitting = ref(false)
 const editingGroup = ref<AdminGroup | null>(null)
 const deletingGroup = ref<AdminGroup | null>(null)
+const showRateMultipliersModal = ref(false)
+const rateMultipliersGroup = ref<AdminGroup | null>(null)
 const sortableGroups = ref<AdminGroup[]>([])
 
 const createForm = reactive({
@@ -2574,6 +2592,11 @@ const handleUpdateGroup = async () => {
   }
 }
 
+const handleRateMultipliers = (group: AdminGroup) => {
+  rateMultipliersGroup.value = group
+  showRateMultipliersModal.value = true
+}
+
 const handleDelete = (group: AdminGroup) => {
   deletingGroup.value = group
   showDeleteDialog.value = true