feat: 用户列表显示订阅分组及剩余天数

- User模型新增Subscriptions关联
- 用户列表批量加载订阅信息避免N+1查询
- GroupBadge组件支持显示剩余天数（过期红色、<=3天红色、<=7天橙色）
- 用户管理页面新增订阅分组列

Author: Wei-Shaw

backend/internal/model/user.go

@@ -22,7 +22,8 @@ type User struct {
 	DeletedAt     gorm.DeletedAt `gorm:"index" json:"-"`
 
 	// 关联
-	ApiKeys []ApiKey `gorm:"foreignKey:UserID" json:"api_keys,omitempty"`
+	ApiKeys       []ApiKey           `gorm:"foreignKey:UserID" json:"api_keys,omitempty"`
+	Subscriptions []UserSubscription `gorm:"foreignKey:UserID" json:"subscriptions,omitempty"`
 }
 
 func (User) TableName() string {

backend/internal/repository/user_repo.go

@@ -73,10 +73,37 @@ func (r *UserRepository) ListWithFilters(ctx context.Context, params pagination.
 		return nil, nil, err
 	}
 
+	// Query users with pagination (reuse the same db with filters applied)
 	if err := db.Offset(params.Offset()).Limit(params.Limit()).Order("id DESC").Find(&users).Error; err != nil {
 		return nil, nil, err
 	}
 
+	// Batch load subscriptions for all users (avoid N+1)
+	if len(users) > 0 {
+		userIDs := make([]int64, len(users))
+		userMap := make(map[int64]*model.User, len(users))
+		for i := range users {
+			userIDs[i] = users[i].ID
+			userMap[users[i].ID] = &users[i]
+		}
+
+		// Query active subscriptions with groups in one query
+		var subscriptions []model.UserSubscription
+		if err := r.db.WithContext(ctx).
+			Preload("Group").
+			Where("user_id IN ? AND status = ?", userIDs, model.SubscriptionStatusActive).
+			Find(&subscriptions).Error; err != nil {
+			return nil, nil, err
+		}
+
+		// Associate subscriptions with users
+		for i := range subscriptions {
+			if user, ok := userMap[subscriptions[i].UserID]; ok {
+				user.Subscriptions = append(user.Subscriptions, subscriptions[i])
+			}
+		}
+	}
+
 	pages := int(total) / params.Limit()
 	if int(total)%params.Limit() > 0 {
 		pages++

frontend/src/components/common/GroupBadge.vue

@@ -9,9 +9,9 @@
     <PlatformIcon v-if="platform" :platform="platform" size="sm" />
     <!-- Group name -->
     <span class="truncate">{{ name }}</span>
-    <!-- Right side label: subscription shows "订阅", standard shows rate multiplier -->
+    <!-- Right side label -->
     <span
-      v-if="showRate"
+      v-if="showLabel"
       :class="labelClass"
     >
       {{ labelText }}
@@ -31,39 +31,73 @@ interface Props {
   subscriptionType?: SubscriptionType
   rateMultiplier?: number
   showRate?: boolean
+  daysRemaining?: number | null  // 剩余天数（订阅类型时使用）
 }
 
 const props = withDefaults(defineProps<Props>(), {
   subscriptionType: 'standard',
-  showRate: true
+  showRate: true,
+  daysRemaining: null
 })
 
 const { t } = useI18n()
 
 const isSubscription = computed(() => props.subscriptionType === 'subscription')
 
-// Label text: subscription shows localized text, standard shows rate
+// 是否显示右侧标签
+const showLabel = computed(() => {
+  if (!props.showRate) return false
+  // 订阅类型：显示天数或"订阅"
+  if (isSubscription.value) return true
+  // 标准类型：显示倍率
+  return props.rateMultiplier !== undefined
+})
+
+// Label text
 const labelText = computed(() => {
   if (isSubscription.value) {
+    // 如果有剩余天数，显示天数
+    if (props.daysRemaining !== null && props.daysRemaining !== undefined) {
+      if (props.daysRemaining <= 0) {
+        return t('admin.users.expired')
+      }
+      return t('admin.users.daysRemaining', { days: props.daysRemaining })
+    }
+    // 否则显示"订阅"
     return t('groups.subscription')
   }
   return props.rateMultiplier !== undefined ? `${props.rateMultiplier}x` : ''
 })
 
-// Label style based on type
+// Label style based on type and days remaining
 const labelClass = computed(() => {
   const base = 'px-1.5 py-0.5 rounded text-[10px] font-semibold'
-  if (isSubscription.value) {
-    // Subscription: more prominent style with border
-    if (props.platform === 'anthropic') {
-      return `${base} bg-orange-200/60 text-orange-800 dark:bg-orange-800/40 dark:text-orange-300`
-    } else if (props.platform === 'openai') {
-      return `${base} bg-emerald-200/60 text-emerald-800 dark:bg-emerald-800/40 dark:text-emerald-300`
+
+  if (!isSubscription.value) {
+    // Standard: subtle background
+    return `${base} bg-black/10 dark:bg-white/10`
+  }
+
+  // 订阅类型：根据剩余天数显示不同颜色
+  if (props.daysRemaining !== null && props.daysRemaining !== undefined) {
+    if (props.daysRemaining <= 0 || props.daysRemaining <= 3) {
+      // 已过期或紧急（<=3天）：红色
+      return `${base} bg-red-200/80 text-red-800 dark:bg-red-800/50 dark:text-red-300`
+    }
+    if (props.daysRemaining <= 7) {
+      // 警告（<=7天）：橙色
+      return `${base} bg-amber-200/80 text-amber-800 dark:bg-amber-800/50 dark:text-amber-300`
     }
-    return `${base} bg-violet-200/60 text-violet-800 dark:bg-violet-800/40 dark:text-violet-300`
   }
-  // Standard: subtle background
-  return `${base} bg-black/10 dark:bg-white/10`
+
+  // 正常状态或无天数：根据平台显示主题色
+  if (props.platform === 'anthropic') {
+    return `${base} bg-orange-200/60 text-orange-800 dark:bg-orange-800/40 dark:text-orange-300`
+  }
+  if (props.platform === 'openai') {
+    return `${base} bg-emerald-200/60 text-emerald-800 dark:bg-emerald-800/40 dark:text-emerald-300`
+  }
+  return `${base} bg-violet-200/60 text-violet-800 dark:bg-violet-800/40 dark:text-violet-300`
 })
 
 // Badge color based on platform and subscription type

frontend/src/i18n/locales/en.ts

@@ -449,6 +449,7 @@ export default {
       columns: {
         user: 'User',
         role: 'Role',
+        subscriptions: 'Subscriptions',
         balance: 'Balance',
         usage: 'Usage',
         concurrency: 'Concurrency',
@@ -458,6 +459,9 @@ export default {
       },
       today: 'Today',
       total: 'Total',
+      noSubscription: 'No subscription',
+      daysRemaining: '{days}d',
+      expired: 'Expired',
       disableUser: 'Disable User',
       enableUser: 'Enable User',
       viewApiKeys: 'View API Keys',

frontend/src/i18n/locales/zh.ts

@@ -467,15 +467,20 @@ export default {
       columns: {
         email: '邮箱',
         role: '角色',
+        subscriptions: '订阅分组',
         balance: '余额',
         usage: '用量',
         concurrency: '并发数',
         status: '状态',
         created: '创建时间',
         actions: '操作',
+        user: '用户',
       },
       today: '今日',
       total: '累计',
+      noSubscription: '暂无订阅',
+      daysRemaining: '{days}天',
+      expired: '已过期',
       roles: {
         admin: '管理员',
         user: '用户',

frontend/src/types/index.ts

@@ -13,6 +13,7 @@ export interface User {
   concurrency: number; // Allowed concurrent requests
   status: 'active' | 'disabled'; // Account status
   allowed_groups: number[] | null; // Allowed group IDs (null = all non-exclusive groups)
+  subscriptions?: UserSubscription[]; // User's active subscriptions
   created_at: string;
   updated_at: string;
 }

frontend/src/views/admin/UsersView.vue

@@ -84,6 +84,27 @@
             </span>
           </template>
 
+          <template #cell-subscriptions="{ row }">
+            <div v-if="row.subscriptions && row.subscriptions.length > 0" class="flex flex-wrap gap-1.5">
+              <GroupBadge
+                v-for="sub in row.subscriptions"
+                :key="sub.id"
+                :name="sub.group?.name || ''"
+                :platform="sub.group?.platform"
+                :subscription-type="sub.group?.subscription_type"
+                :rate-multiplier="sub.group?.rate_multiplier"
+                :days-remaining="sub.expires_at ? getDaysRemaining(sub.expires_at) : null"
+                :title="sub.expires_at ? formatExpiresAt(sub.expires_at) : ''"
+              />
+            </div>
+            <span v-else class="inline-flex items-center gap-1.5 px-2 py-1 rounded-md text-xs text-gray-400 dark:text-dark-500 bg-gray-50 dark:bg-dark-700/50">
+              <svg class="w-3.5 h-3.5" fill="none" stroke="currentColor" viewBox="0 0 24 24" stroke-width="1.5">
+                <path stroke-linecap="round" stroke-linejoin="round" d="M18.364 18.364A9 9 0 005.636 5.636m12.728 12.728A9 9 0 015.636 5.636m12.728 12.728L5.636 5.636" />
+              </svg>
+              <span>{{ t('admin.users.noSubscription') }}</span>
+            </span>
+          </template>
+
           <template #cell-balance="{ value }">
             <span class="font-medium text-gray-900 dark:text-white">${{ value.toFixed(2) }}</span>
           </template>
@@ -662,12 +683,14 @@ import Modal from '@/components/common/Modal.vue'
 import ConfirmDialog from '@/components/common/ConfirmDialog.vue'
 import EmptyState from '@/components/common/EmptyState.vue'
 import Select from '@/components/common/Select.vue'
+import GroupBadge from '@/components/common/GroupBadge.vue'
 
 const appStore = useAppStore()
 
 const columns = computed<Column[]>(() => [
   { key: 'email', label: t('admin.users.columns.user'), sortable: true },
   { key: 'role', label: t('admin.users.columns.role'), sortable: true },
+  { key: 'subscriptions', label: t('admin.users.columns.subscriptions'), sortable: false },
   { key: 'balance', label: t('admin.users.columns.balance'), sortable: true },
   { key: 'usage', label: t('admin.users.columns.usage'), sortable: false },
   { key: 'concurrency', label: t('admin.users.columns.concurrency'), sortable: true },
@@ -749,6 +772,20 @@ const formatDate = (dateString: string): string => {
   })
 }
 
+// 计算剩余天数
+const getDaysRemaining = (expiresAt: string): number => {
+  const now = new Date()
+  const expires = new Date(expiresAt)
+  const diffMs = expires.getTime() - now.getTime()
+  return Math.ceil(diffMs / (1000 * 60 * 60 * 24))
+}
+
+// 格式化过期时间（用于 tooltip）
+const formatExpiresAt = (expiresAt: string): string => {
+  const date = new Date(expiresAt)
+  return date.toLocaleString()
+}
+
 const generateRandomPasswordStr = () => {
   const chars = 'ABCDEFGHJKLMNPQRSTUVWXYZabcdefghjkmnpqrstuvwxyz23456789!@#$%^&*'
   let password = ''