feat: add admin reset subscription quota endpoint and UI

- Add AdminResetQuota service method to reset daily/weekly usage windows
- Add POST /api/v1/admin/subscriptions/:id/reset-quota handler and route
- Add resetQuota API function in frontend subscriptions client
- Add reset quota button, confirmation dialog, and handlers in SubscriptionsView
- Add i18n keys for reset quota feature in zh and en locales

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/internal/handler/admin/subscription_handler.go

@@ -216,6 +216,37 @@ func (h *SubscriptionHandler) Extend(c *gin.Context) {
 	})
 }
 
+// ResetSubscriptionQuotaRequest represents the reset quota request
+type ResetSubscriptionQuotaRequest struct {
+	Daily  bool `json:"daily"`
+	Weekly bool `json:"weekly"`
+}
+
+// ResetQuota resets daily and/or weekly usage for a subscription.
+// POST /api/v1/admin/subscriptions/:id/reset-quota
+func (h *SubscriptionHandler) ResetQuota(c *gin.Context) {
+	subscriptionID, err := strconv.ParseInt(c.Param("id"), 10, 64)
+	if err != nil {
+		response.BadRequest(c, "Invalid subscription ID")
+		return
+	}
+	var req ResetSubscriptionQuotaRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		response.BadRequest(c, "Invalid request: "+err.Error())
+		return
+	}
+	if !req.Daily && !req.Weekly {
+		response.BadRequest(c, "At least one of 'daily' or 'weekly' must be true")
+		return
+	}
+	sub, err := h.subscriptionService.AdminResetQuota(c.Request.Context(), subscriptionID, req.Daily, req.Weekly)
+	if err != nil {
+		response.ErrorFrom(c, err)
+		return
+	}
+	response.Success(c, dto.UserSubscriptionFromServiceAdmin(sub))
+}
+
 // Revoke handles revoking a subscription
 // DELETE /api/v1/admin/subscriptions/:id
 func (h *SubscriptionHandler) Revoke(c *gin.Context) {

backend/internal/server/routes/admin.go

@@ -453,6 +453,7 @@ func registerSubscriptionRoutes(admin *gin.RouterGroup, h *handler.Handlers) {
 		subscriptions.POST("/assign", h.Admin.Subscription.Assign)
 		subscriptions.POST("/bulk-assign", h.Admin.Subscription.BulkAssign)
 		subscriptions.POST("/:id/extend", h.Admin.Subscription.Extend)
+		subscriptions.POST("/:id/reset-quota", h.Admin.Subscription.ResetQuota)
 		subscriptions.DELETE("/:id", h.Admin.Subscription.Revoke)
 	}
 

backend/internal/service/subscription_service.go

@@ -695,6 +695,37 @@ func (s *SubscriptionService) CheckAndActivateWindow(ctx context.Context, sub *U
 	return s.userSubRepo.ActivateWindows(ctx, sub.ID, windowStart)
 }
 
+// AdminResetQuota manually resets the daily and/or weekly usage windows.
+// Uses startOfDay(now) as the new window start, matching automatic resets.
+func (s *SubscriptionService) AdminResetQuota(ctx context.Context, subscriptionID int64, resetDaily, resetWeekly bool) (*UserSubscription, error) {
+	sub, err := s.userSubRepo.GetByID(ctx, subscriptionID)
+	if err != nil {
+		return nil, err
+	}
+	windowStart := startOfDay(time.Now())
+	if resetDaily {
+		if err := s.userSubRepo.ResetDailyUsage(ctx, sub.ID, windowStart); err != nil {
+			return nil, err
+		}
+		sub.DailyWindowStart = &windowStart
+		sub.DailyUsageUSD = 0
+	}
+	if resetWeekly {
+		if err := s.userSubRepo.ResetWeeklyUsage(ctx, sub.ID, windowStart); err != nil {
+			return nil, err
+		}
+		sub.WeeklyWindowStart = &windowStart
+		sub.WeeklyUsageUSD = 0
+	}
+	// Invalidate caches, same as CheckAndResetWindows
+	s.InvalidateSubCache(sub.UserID, sub.GroupID)
+	if s.billingCacheService != nil {
+		_ = s.billingCacheService.InvalidateSubscription(ctx, sub.UserID, sub.GroupID)
+	}
+	// Return the refreshed subscription from DB
+	return s.userSubRepo.GetByID(ctx, subscriptionID)
+}
+
 // CheckAndResetWindows 检查并重置过期的窗口
 func (s *SubscriptionService) CheckAndResetWindows(ctx context.Context, sub *UserSubscription) error {
 	// 使用当天零点作为新窗口起始时间

frontend/src/api/admin/subscriptions.ts

@@ -120,6 +120,23 @@ export async function revoke(id: number): Promise<{ message: string }> {
   return data
 }
 
+/**
+ * Reset daily and/or weekly usage quota for a subscription
+ * @param id - Subscription ID
+ * @param options - Which windows to reset
+ * @returns Updated subscription
+ */
+export async function resetQuota(
+  id: number,
+  options: { daily: boolean; weekly: boolean }
+): Promise<UserSubscription> {
+  const { data } = await apiClient.post<UserSubscription>(
+    `/admin/subscriptions/${id}/reset-quota`,
+    options
+  )
+  return data
+}
+
 /**
  * List subscriptions by group
  * @param groupId - Group ID
@@ -170,6 +187,7 @@ export const subscriptionsAPI = {
   bulkAssign,
   extend,
   revoke,
+  resetQuota,
   listByGroup,
   listByUser
 }

frontend/src/i18n/locales/en.ts

@@ -1570,6 +1570,11 @@ export default {
       adjust: 'Adjust',
       adjusting: 'Adjusting...',
       revoke: 'Revoke',
+      resetQuota: 'Reset Quota',
+      resetQuotaTitle: 'Reset Usage Quota',
+      resetQuotaConfirm: "Reset the daily and weekly usage quota for '{user}'? Usage will be zeroed and windows restarted from today.",
+      quotaResetSuccess: 'Quota reset successfully',
+      failedToResetQuota: 'Failed to reset quota',
       noSubscriptionsYet: 'No subscriptions yet',
       assignFirstSubscription: 'Assign a subscription to get started.',
       subscriptionAssigned: 'Subscription assigned successfully',

frontend/src/i18n/locales/zh.ts

@@ -1658,6 +1658,11 @@ export default {
       adjust: '调整',
       adjusting: '调整中...',
       revoke: '撤销',
+      resetQuota: '重置配额',
+      resetQuotaTitle: '重置用量配额',
+      resetQuotaConfirm: "确定要重置 '{user}' 的每日和每周用量配额吗？用量将归零并从今天开始重新计算。",
+      quotaResetSuccess: '配额重置成功',
+      failedToResetQuota: '重置配额失败',
       noSubscriptionsYet: '暂无订阅',
       assignFirstSubscription: '分配一个订阅以开始使用。',
       subscriptionAssigned: '订阅分配成功',

frontend/src/views/admin/SubscriptionsView.vue

@@ -370,6 +370,14 @@
                 <Icon name="calendar" size="sm" />
                 <span class="text-xs">{{ t('admin.subscriptions.adjust') }}</span>
               </button>
+              <button
+                v-if="row.status === 'active'"
+                @click="handleResetQuota(row)"
+                class="flex flex-col items-center gap-0.5 rounded-lg p-1.5 text-gray-500 transition-colors hover:bg-orange-50 hover:text-orange-600 dark:hover:bg-orange-900/20 dark:hover:text-orange-400"
+              >
+                <Icon name="refresh" size="sm" />
+                <span class="text-xs">{{ t('admin.subscriptions.resetQuota') }}</span>
+              </button>
               <button
                 v-if="row.status === 'active'"
                 @click="handleRevoke(row)"
@@ -618,6 +626,17 @@
       @confirm="confirmRevoke"
       @cancel="showRevokeDialog = false"
     />
+
+    <!-- Reset Quota Confirmation Dialog -->
+    <ConfirmDialog
+      :show="showResetQuotaConfirm"
+      :title="t('admin.subscriptions.resetQuotaTitle')"
+      :message="t('admin.subscriptions.resetQuotaConfirm', { user: resettingSubscription?.user?.email })"
+      :confirm-text="t('admin.subscriptions.resetQuota')"
+      :cancel-text="t('common.cancel')"
+      @confirm="confirmResetQuota"
+      @cancel="showResetQuotaConfirm = false"
+    />
   </AppLayout>
 </template>
 
@@ -812,7 +831,10 @@ const pagination = reactive({
 const showAssignModal = ref(false)
 const showExtendModal = ref(false)
 const showRevokeDialog = ref(false)
+const showResetQuotaConfirm = ref(false)
 const submitting = ref(false)
+const resettingSubscription = ref<UserSubscription | null>(null)
+const resettingQuota = ref(false)
 const extendingSubscription = ref<UserSubscription | null>(null)
 const revokingSubscription = ref<UserSubscription | null>(null)
 
@@ -1121,6 +1143,28 @@ const confirmRevoke = async () => {
   }
 }
 
+const handleResetQuota = (subscription: UserSubscription) => {
+  resettingSubscription.value = subscription
+  showResetQuotaConfirm.value = true
+}
+
+const confirmResetQuota = async () => {
+  if (!resettingSubscription.value) return
+  resettingQuota.value = true
+  try {
+    await adminAPI.subscriptions.resetQuota(resettingSubscription.value.id, { daily: true, weekly: true })
+    appStore.showSuccess(t('admin.subscriptions.quotaResetSuccess'))
+    showResetQuotaConfirm.value = false
+    resettingSubscription.value = null
+    await loadSubscriptions()
+  } catch (error: any) {
+    appStore.showError(error.response?.data?.detail || t('admin.subscriptions.failedToResetQuota'))
+    console.error('Error resetting quota:', error)
+  } finally {
+    resettingQuota.value = false
+  }
+}
+
 // Helper functions
 const getDaysRemaining = (expiresAt: string): number | null => {
   const now = new Date()