feat(admin): add user balance/concurrency history modal

- Add new API endpoint GET /admin/users/:id/balance-history with pagination and type filter
- Add SumPositiveBalanceByUser for calculating total recharged amount
- Create UserBalanceHistoryModal component with:
  - User info header (email, username, created_at, current balance, notes, total recharged)
  - Type filter dropdown (all/balance/admin_balance/concurrency/admin_concurrency/subscription)
  - Quick deposit/withdraw buttons
  - Paginated history list with icons and colored values
- Add instant tooltip on balance column for better UX
- Add z-index prop to BaseDialog for modal stacking control
- Update i18n translations (zh/en)

backend/internal/handler/admin/user_handler.go

@@ -277,3 +277,44 @@ func (h *UserHandler) GetUserUsage(c *gin.Context) {
 
 	response.Success(c, stats)
 }
+
+// GetBalanceHistory handles getting user's balance/concurrency change history
+// GET /api/v1/admin/users/:id/balance-history
+// Query params:
+//   - type: filter by record type (balance, admin_balance, concurrency, admin_concurrency, subscription)
+func (h *UserHandler) GetBalanceHistory(c *gin.Context) {
+	userID, err := strconv.ParseInt(c.Param("id"), 10, 64)
+	if err != nil {
+		response.BadRequest(c, "Invalid user ID")
+		return
+	}
+
+	page, pageSize := response.ParsePagination(c)
+	codeType := c.Query("type")
+
+	codes, total, totalRecharged, err := h.adminService.GetUserBalanceHistory(c.Request.Context(), userID, page, pageSize, codeType)
+	if err != nil {
+		response.ErrorFrom(c, err)
+		return
+	}
+
+	// Convert to admin DTO (includes notes field for admin visibility)
+	out := make([]dto.AdminRedeemCode, 0, len(codes))
+	for i := range codes {
+		out = append(out, *dto.RedeemCodeFromServiceAdmin(&codes[i]))
+	}
+
+	// Custom response with total_recharged alongside pagination
+	pages := int((total + int64(pageSize) - 1) / int64(pageSize))
+	if pages < 1 {
+		pages = 1
+	}
+	response.Success(c, gin.H{
+		"items":           out,
+		"total":           total,
+		"page":            page,
+		"page_size":       pageSize,
+		"pages":           pages,
+		"total_recharged": totalRecharged,
+	})
+}

backend/internal/repository/redeem_code_repo.go

@@ -202,6 +202,57 @@ func (r *redeemCodeRepository) ListByUser(ctx context.Context, userID int64, lim
 	return redeemCodeEntitiesToService(codes), nil
 }
 
+// ListByUserPaginated returns paginated balance/concurrency history for a user.
+// Supports optional type filter (e.g. "balance", "admin_balance", "concurrency", "admin_concurrency", "subscription").
+func (r *redeemCodeRepository) ListByUserPaginated(ctx context.Context, userID int64, params pagination.PaginationParams, codeType string) ([]service.RedeemCode, *pagination.PaginationResult, error) {
+	q := r.client.RedeemCode.Query().
+		Where(redeemcode.UsedByEQ(userID))
+
+	// Optional type filter
+	if codeType != "" {
+		q = q.Where(redeemcode.TypeEQ(codeType))
+	}
+
+	total, err := q.Count(ctx)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	codes, err := q.
+		WithGroup().
+		Offset(params.Offset()).
+		Limit(params.Limit()).
+		Order(dbent.Desc(redeemcode.FieldUsedAt)).
+		All(ctx)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	return redeemCodeEntitiesToService(codes), paginationResultFromTotal(int64(total), params), nil
+}
+
+// SumPositiveBalanceByUser returns total recharged amount (sum of value > 0 where type is balance/admin_balance).
+func (r *redeemCodeRepository) SumPositiveBalanceByUser(ctx context.Context, userID int64) (float64, error) {
+	var result []struct {
+		Sum float64 `json:"sum"`
+	}
+	err := r.client.RedeemCode.Query().
+		Where(
+			redeemcode.UsedByEQ(userID),
+			redeemcode.ValueGT(0),
+			redeemcode.TypeIn("balance", "admin_balance"),
+		).
+		Aggregate(dbent.As(dbent.Sum(redeemcode.FieldValue), "sum")).
+		Scan(ctx, &result)
+	if err != nil {
+		return 0, err
+	}
+	if len(result) == 0 {
+		return 0, nil
+	}
+	return result[0].Sum, nil
+}
+
 func redeemCodeEntityToService(m *dbent.RedeemCode) *service.RedeemCode {
 	if m == nil {
 		return nil

backend/internal/server/routes/admin.go

@@ -172,6 +172,7 @@ func registerUserManagementRoutes(admin *gin.RouterGroup, h *handler.Handlers) {
 		users.POST("/:id/balance", h.Admin.User.UpdateBalance)
 		users.GET("/:id/api-keys", h.Admin.User.GetUserAPIKeys)
 		users.GET("/:id/usage", h.Admin.User.GetUserUsage)
+		users.GET("/:id/balance-history", h.Admin.User.GetBalanceHistory)
 
 		// User attribute values
 		users.GET("/:id/attributes", h.Admin.UserAttribute.GetUserAttributes)

backend/internal/service/admin_service.go

@@ -22,6 +22,10 @@ type AdminService interface {
 	UpdateUserBalance(ctx context.Context, userID int64, balance float64, operation string, notes string) (*User, error)
 	GetUserAPIKeys(ctx context.Context, userID int64, page, pageSize int) ([]APIKey, int64, error)
 	GetUserUsageStats(ctx context.Context, userID int64, period string) (any, error)
+	// GetUserBalanceHistory returns paginated balance/concurrency change records for a user.
+	// codeType is optional - pass empty string to return all types.
+	// Also returns totalRecharged (sum of all positive balance top-ups).
+	GetUserBalanceHistory(ctx context.Context, userID int64, page, pageSize int, codeType string) ([]RedeemCode, int64, float64, error)
 
 	// Group management
 	ListGroups(ctx context.Context, page, pageSize int, platform, status, search string, isExclusive *bool) ([]Group, int64, error)
@@ -522,6 +526,21 @@ func (s *adminServiceImpl) GetUserUsageStats(ctx context.Context, userID int64,
 	}, nil
 }
 
+// GetUserBalanceHistory returns paginated balance/concurrency change records for a user.
+func (s *adminServiceImpl) GetUserBalanceHistory(ctx context.Context, userID int64, page, pageSize int, codeType string) ([]RedeemCode, int64, float64, error) {
+	params := pagination.PaginationParams{Page: page, PageSize: pageSize}
+	codes, result, err := s.redeemCodeRepo.ListByUserPaginated(ctx, userID, params, codeType)
+	if err != nil {
+		return nil, 0, 0, err
+	}
+	// Aggregate total recharged amount (only once, regardless of type filter)
+	totalRecharged, err := s.redeemCodeRepo.SumPositiveBalanceByUser(ctx, userID)
+	if err != nil {
+		return nil, 0, 0, err
+	}
+	return codes, result.Total, totalRecharged, nil
+}
+
 // Group management implementations
 func (s *adminServiceImpl) ListGroups(ctx context.Context, page, pageSize int, platform, status, search string, isExclusive *bool) ([]Group, int64, error) {
 	params := pagination.PaginationParams{Page: page, PageSize: pageSize}

backend/internal/service/redeem_service.go

@@ -49,6 +49,11 @@ type RedeemCodeRepository interface {
 	List(ctx context.Context, params pagination.PaginationParams) ([]RedeemCode, *pagination.PaginationResult, error)
 	ListWithFilters(ctx context.Context, params pagination.PaginationParams, codeType, status, search string) ([]RedeemCode, *pagination.PaginationResult, error)
 	ListByUser(ctx context.Context, userID int64, limit int) ([]RedeemCode, error)
+	// ListByUserPaginated returns paginated balance/concurrency history for a specific user.
+	// codeType filter is optional - pass empty string to return all types.
+	ListByUserPaginated(ctx context.Context, userID int64, params pagination.PaginationParams, codeType string) ([]RedeemCode, *pagination.PaginationResult, error)
+	// SumPositiveBalanceByUser returns the total recharged amount (sum of positive balance values) for a user.
+	SumPositiveBalanceByUser(ctx context.Context, userID int64) (float64, error)
 }
 
 // GenerateCodesRequest 生成兑换码请求

frontend/src/api/admin/index.ts

@@ -59,3 +59,6 @@ export {
 }
 
 export default adminAPI
+
+// Re-export types used by components
+export type { BalanceHistoryItem } from './users'

frontend/src/api/admin/users.ts

@@ -174,6 +174,53 @@ export async function getUserUsageStats(
   return data
 }
 
+/**
+ * Balance history item returned from the API
+ */
+export interface BalanceHistoryItem {
+  id: number
+  code: string
+  type: string
+  value: number
+  status: string
+  used_by: number | null
+  used_at: string | null
+  created_at: string
+  group_id: number | null
+  validity_days: number
+  notes: string
+  user?: { id: number; email: string } | null
+  group?: { id: number; name: string } | null
+}
+
+// Balance history response extends pagination with total_recharged summary
+export interface BalanceHistoryResponse extends PaginatedResponse<BalanceHistoryItem> {
+  total_recharged: number
+}
+
+/**
+ * Get user's balance/concurrency change history
+ * @param id - User ID
+ * @param page - Page number
+ * @param pageSize - Items per page
+ * @param type - Optional type filter (balance, admin_balance, concurrency, admin_concurrency, subscription)
+ * @returns Paginated balance history with total_recharged
+ */
+export async function getUserBalanceHistory(
+  id: number,
+  page: number = 1,
+  pageSize: number = 20,
+  type?: string
+): Promise<BalanceHistoryResponse> {
+  const params: Record<string, any> = { page, page_size: pageSize }
+  if (type) params.type = type
+  const { data } = await apiClient.get<BalanceHistoryResponse>(
+    `/admin/users/${id}/balance-history`,
+    { params }
+  )
+  return data
+}
+
 export const usersAPI = {
   list,
   getById,
@@ -184,7 +231,8 @@ export const usersAPI = {
   updateConcurrency,
   toggleStatus,
   getUserApiKeys,
-  getUserUsageStats
+  getUserUsageStats,
+  getUserBalanceHistory
 }
 
 export default usersAPI

frontend/src/components/admin/user/UserBalanceHistoryModal.vue

@@ -0,0 +1,320 @@
+<template>
+  <BaseDialog :show="show" :title="t('admin.users.balanceHistoryTitle')" width="wide" :close-on-click-outside="true" :z-index="40" @close="$emit('close')">
+    <div v-if="user" class="space-y-4">
+      <!-- User header: two-row layout with full user info -->
+      <div class="rounded-xl bg-gray-50 p-4 dark:bg-dark-700">
+        <!-- Row 1: avatar + email/username/created_at (left) + current balance (right) -->
+        <div class="flex items-center gap-3">
+          <div class="flex h-10 w-10 flex-shrink-0 items-center justify-center rounded-full bg-primary-100 dark:bg-primary-900/30">
+            <span class="text-lg font-medium text-primary-700 dark:text-primary-300">
+              {{ user.email.charAt(0).toUpperCase() }}
+            </span>
+          </div>
+          <div class="min-w-0 flex-1">
+            <div class="flex items-center gap-2">
+              <p class="truncate font-medium text-gray-900 dark:text-white">{{ user.email }}</p>
+              <span
+                v-if="user.username"
+                class="flex-shrink-0 rounded bg-primary-50 px-1.5 py-0.5 text-xs text-primary-600 dark:bg-primary-900/20 dark:text-primary-400"
+              >
+                {{ user.username }}
+              </span>
+            </div>
+            <p class="text-xs text-gray-400 dark:text-dark-500">
+              {{ t('admin.users.createdAt') }}: {{ formatDateTime(user.created_at) }}
+            </p>
+          </div>
+          <!-- Current balance: prominent display on the right -->
+          <div class="flex-shrink-0 text-right">
+            <p class="text-xs text-gray-500 dark:text-dark-400">{{ t('admin.users.currentBalance') }}</p>
+            <p class="text-xl font-bold text-gray-900 dark:text-white">
+              ${{ user.balance?.toFixed(2) || '0.00' }}
+            </p>
+          </div>
+        </div>
+        <!-- Row 2: notes + total recharged -->
+        <div class="mt-2.5 flex items-center justify-between border-t border-gray-200/60 pt-2.5 dark:border-dark-600/60">
+          <p class="min-w-0 flex-1 truncate text-xs text-gray-500 dark:text-dark-400" :title="user.notes || ''">
+            <template v-if="user.notes">{{ t('admin.users.notes') }}: {{ user.notes }}</template>
+            <template v-else>&nbsp;</template>
+          </p>
+          <p class="ml-4 flex-shrink-0 text-xs text-gray-500 dark:text-dark-400">
+            {{ t('admin.users.totalRecharged') }}: <span class="font-semibold text-emerald-600 dark:text-emerald-400">${{ totalRecharged.toFixed(2) }}</span>
+          </p>
+        </div>
+      </div>
+
+      <!-- Type filter + Action buttons -->
+      <div class="flex items-center gap-3">
+        <Select
+          v-model="typeFilter"
+          :options="typeOptions"
+          class="w-56"
+          @change="loadHistory(1)"
+        />
+        <!-- Deposit button - matches menu style -->
+        <button
+          @click="emit('deposit')"
+          class="flex items-center gap-2 rounded-lg border border-gray-200 bg-white px-3 py-2 text-sm text-gray-700 transition-colors hover:bg-gray-50 dark:border-dark-600 dark:bg-dark-800 dark:text-gray-300 dark:hover:bg-dark-700"
+        >
+          <Icon name="plus" size="sm" class="text-emerald-500" :stroke-width="2" />
+          {{ t('admin.users.deposit') }}
+        </button>
+        <!-- Withdraw button - matches menu style -->
+        <button
+          @click="emit('withdraw')"
+          class="flex items-center gap-2 rounded-lg border border-gray-200 bg-white px-3 py-2 text-sm text-gray-700 transition-colors hover:bg-gray-50 dark:border-dark-600 dark:bg-dark-800 dark:text-gray-300 dark:hover:bg-dark-700"
+        >
+          <svg class="h-4 w-4 text-amber-500" fill="none" viewBox="0 0 24 24" stroke="currentColor">
+            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M20 12H4" />
+          </svg>
+          {{ t('admin.users.withdraw') }}
+        </button>
+      </div>
+
+      <!-- Loading -->
+      <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" />
+          <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" />
+        </svg>
+      </div>
+
+      <!-- Empty state -->
+      <div v-else-if="history.length === 0" class="py-8 text-center">
+        <p class="text-sm text-gray-500">{{ t('admin.users.noBalanceHistory') }}</p>
+      </div>
+
+      <!-- History list -->
+      <div v-else class="max-h-[28rem] space-y-3 overflow-y-auto">
+        <div
+          v-for="item in history"
+          :key="item.id"
+          class="rounded-xl border border-gray-200 bg-white p-4 dark:border-dark-600 dark:bg-dark-800"
+        >
+          <div class="flex items-start justify-between">
+            <!-- Left: type icon + description -->
+            <div class="flex items-start gap-3">
+              <div
+                :class="[
+                  'flex h-9 w-9 flex-shrink-0 items-center justify-center rounded-lg',
+                  getIconBg(item)
+                ]"
+              >
+                <Icon :name="getIconName(item)" size="sm" :class="getIconColor(item)" />
+              </div>
+              <div>
+                <p class="text-sm font-medium text-gray-900 dark:text-white">
+                  {{ getItemTitle(item) }}
+                </p>
+                <!-- Notes (admin adjustment reason) -->
+                <p
+                  v-if="item.notes"
+                  class="mt-0.5 text-xs text-gray-500 dark:text-dark-400"
+                  :title="item.notes"
+                >
+                  {{ item.notes.length > 60 ? item.notes.substring(0, 55) + '...' : item.notes }}
+                </p>
+                <p class="mt-0.5 text-xs text-gray-400 dark:text-dark-500">
+                  {{ formatDateTime(item.used_at || item.created_at) }}
+                </p>
+              </div>
+            </div>
+            <!-- Right: value -->
+            <div class="text-right">
+              <p :class="['text-sm font-semibold', getValueColor(item)]">
+                {{ formatValue(item) }}
+              </p>
+              <p
+                v-if="isAdminType(item.type)"
+                class="text-xs text-gray-400 dark:text-dark-500"
+              >
+                {{ t('redeem.adminAdjustment') }}
+              </p>
+              <p
+                v-else
+                class="font-mono text-xs text-gray-400 dark:text-dark-500"
+              >
+                {{ item.code.slice(0, 8) }}...
+              </p>
+            </div>
+          </div>
+        </div>
+      </div>
+
+      <!-- Pagination -->
+      <div v-if="totalPages > 1" class="flex items-center justify-center gap-2 pt-2">
+        <button
+          :disabled="currentPage <= 1"
+          class="btn btn-secondary px-3 py-1 text-sm"
+          @click="loadHistory(currentPage - 1)"
+        >
+          {{ t('pagination.previous') }}
+        </button>
+        <span class="text-sm text-gray-500 dark:text-dark-400">
+          {{ currentPage }} / {{ totalPages }}
+        </span>
+        <button
+          :disabled="currentPage >= totalPages"
+          class="btn btn-secondary px-3 py-1 text-sm"
+          @click="loadHistory(currentPage + 1)"
+        >
+          {{ t('pagination.next') }}
+        </button>
+      </div>
+    </div>
+  </BaseDialog>
+</template>
+
+<script setup lang="ts">
+import { ref, computed, watch } from 'vue'
+import { useI18n } from 'vue-i18n'
+import { adminAPI, type BalanceHistoryItem } from '@/api/admin'
+import { formatDateTime } from '@/utils/format'
+import type { AdminUser } from '@/types'
+import BaseDialog from '@/components/common/BaseDialog.vue'
+import Select from '@/components/common/Select.vue'
+import Icon from '@/components/icons/Icon.vue'
+
+const props = defineProps<{ show: boolean; user: AdminUser | null }>()
+const emit = defineEmits(['close', 'deposit', 'withdraw'])
+const { t } = useI18n()
+
+const history = ref<BalanceHistoryItem[]>([])
+const loading = ref(false)
+const currentPage = ref(1)
+const total = ref(0)
+const totalRecharged = ref(0)
+const pageSize = 15
+const typeFilter = ref('')
+
+const totalPages = computed(() => Math.ceil(total.value / pageSize) || 1)
+
+// Type filter options
+const typeOptions = computed(() => [
+  { value: '', label: t('admin.users.allTypes') },
+  { value: 'balance', label: t('admin.users.typeBalance') },
+  { value: 'admin_balance', label: t('admin.users.typeAdminBalance') },
+  { value: 'concurrency', label: t('admin.users.typeConcurrency') },
+  { value: 'admin_concurrency', label: t('admin.users.typeAdminConcurrency') },
+  { value: 'subscription', label: t('admin.users.typeSubscription') }
+])
+
+// Watch modal open
+watch(() => props.show, (v) => {
+  if (v && props.user) {
+    typeFilter.value = ''
+    loadHistory(1)
+  }
+})
+
+const loadHistory = async (page: number) => {
+  if (!props.user) return
+  loading.value = true
+  currentPage.value = page
+  try {
+    const res = await adminAPI.users.getUserBalanceHistory(
+      props.user.id,
+      page,
+      pageSize,
+      typeFilter.value || undefined
+    )
+    history.value = res.items || []
+    total.value = res.total || 0
+    totalRecharged.value = res.total_recharged || 0
+  } catch (error) {
+    console.error('Failed to load balance history:', error)
+  } finally {
+    loading.value = false
+  }
+}
+
+// Helper: check if admin type
+const isAdminType = (type: string) => type === 'admin_balance' || type === 'admin_concurrency'
+
+// Helper: check if balance type (includes admin_balance)
+const isBalanceType = (type: string) => type === 'balance' || type === 'admin_balance'
+
+// Helper: check if subscription type
+const isSubscriptionType = (type: string) => type === 'subscription'
+
+// Icon name based on type
+const getIconName = (item: BalanceHistoryItem) => {
+  if (isBalanceType(item.type)) return 'dollar'
+  if (isSubscriptionType(item.type)) return 'badge'
+  return 'bolt' // concurrency
+}
+
+// Icon background color
+const getIconBg = (item: BalanceHistoryItem) => {
+  if (isBalanceType(item.type)) {
+    return item.value >= 0
+      ? 'bg-emerald-100 dark:bg-emerald-900/30'
+      : 'bg-red-100 dark:bg-red-900/30'
+  }
+  if (isSubscriptionType(item.type)) return 'bg-purple-100 dark:bg-purple-900/30'
+  return item.value >= 0
+    ? 'bg-blue-100 dark:bg-blue-900/30'
+    : 'bg-orange-100 dark:bg-orange-900/30'
+}
+
+// Icon text color
+const getIconColor = (item: BalanceHistoryItem) => {
+  if (isBalanceType(item.type)) {
+    return item.value >= 0
+      ? 'text-emerald-600 dark:text-emerald-400'
+      : 'text-red-600 dark:text-red-400'
+  }
+  if (isSubscriptionType(item.type)) return 'text-purple-600 dark:text-purple-400'
+  return item.value >= 0
+    ? 'text-blue-600 dark:text-blue-400'
+    : 'text-orange-600 dark:text-orange-400'
+}
+
+// Value text color
+const getValueColor = (item: BalanceHistoryItem) => {
+  if (isBalanceType(item.type)) {
+    return item.value >= 0
+      ? 'text-emerald-600 dark:text-emerald-400'
+      : 'text-red-600 dark:text-red-400'
+  }
+  if (isSubscriptionType(item.type)) return 'text-purple-600 dark:text-purple-400'
+  return item.value >= 0
+    ? 'text-blue-600 dark:text-blue-400'
+    : 'text-orange-600 dark:text-orange-400'
+}
+
+// Item title
+const getItemTitle = (item: BalanceHistoryItem) => {
+  switch (item.type) {
+    case 'balance':
+      return t('redeem.balanceAddedRedeem')
+    case 'admin_balance':
+      return item.value >= 0 ? t('redeem.balanceAddedAdmin') : t('redeem.balanceDeductedAdmin')
+    case 'concurrency':
+      return t('redeem.concurrencyAddedRedeem')
+    case 'admin_concurrency':
+      return item.value >= 0 ? t('redeem.concurrencyAddedAdmin') : t('redeem.concurrencyReducedAdmin')
+    case 'subscription':
+      return t('redeem.subscriptionAssigned')
+    default:
+      return t('common.unknown')
+  }
+}
+
+// Format display value
+const formatValue = (item: BalanceHistoryItem) => {
+  if (isBalanceType(item.type)) {
+    const sign = item.value >= 0 ? '+' : ''
+    return `${sign}$${item.value.toFixed(2)}`
+  }
+  if (isSubscriptionType(item.type)) {
+    const days = item.validity_days || Math.round(item.value)
+    const groupName = item.group?.name || ''
+    return groupName ? `${days}d - ${groupName}` : `${days}d`
+  }
+  // concurrency types
+  const sign = item.value >= 0 ? '+' : ''
+  return `${sign}${item.value}`
+}
+</script>

frontend/src/components/common/BaseDialog.vue

@@ -4,6 +4,7 @@
       <div
         v-if="show"
         class="modal-overlay"
+        :style="zIndexStyle"
         :aria-labelledby="dialogId"
         role="dialog"
         aria-modal="true"
@@ -60,6 +61,7 @@ interface Props {
   width?: DialogWidth
   closeOnEscape?: boolean
   closeOnClickOutside?: boolean
+  zIndex?: number
 }
 
 interface Emits {
@@ -69,11 +71,17 @@ interface Emits {
 const props = withDefaults(defineProps<Props>(), {
   width: 'normal',
   closeOnEscape: true,
-  closeOnClickOutside: false
+  closeOnClickOutside: false,
+  zIndex: 50
 })
 
 const emit = defineEmits<Emits>()
 
+// Custom z-index style (overrides the default z-50 from CSS)
+const zIndexStyle = computed(() => {
+  return props.zIndex !== 50 ? { zIndex: props.zIndex } : undefined
+})
+
 const widthClasses = computed(() => {
   // Width guidance: narrow=confirm/short prompts, normal=standard forms,
   // wide=multi-section forms or rich content, extra-wide=analytics/tables,

frontend/src/i18n/locales/en.ts

@@ -832,6 +832,20 @@ export default {
       failedToDeposit: 'Failed to deposit',
       failedToWithdraw: 'Failed to withdraw',
       useDepositWithdrawButtons: 'Please use deposit/withdraw buttons to adjust balance',
+      // Balance History
+      balanceHistory: 'Recharge History',
+      balanceHistoryTip: 'Click to open recharge history',
+      balanceHistoryTitle: 'User Recharge & Concurrency History',
+      noBalanceHistory: 'No records found for this user',
+      allTypes: 'All Types',
+      typeBalance: 'Balance (Redeem)',
+      typeAdminBalance: 'Balance (Admin)',
+      typeConcurrency: 'Concurrency (Redeem)',
+      typeAdminConcurrency: 'Concurrency (Admin)',
+      typeSubscription: 'Subscription',
+      failedToLoadBalanceHistory: 'Failed to load balance history',
+      createdAt: 'Created',
+      totalRecharged: 'Total Recharged',
       roles: {
         admin: 'Admin',
         user: 'User'

frontend/src/i18n/locales/zh.ts

@@ -883,6 +883,20 @@ export default {
       failedToDeposit: '充值失败',
       failedToWithdraw: '退款失败',
       useDepositWithdrawButtons: '请使用充值/退款按钮调整余额',
+      // 余额变动记录
+      balanceHistory: '充值记录',
+      balanceHistoryTip: '点击查看充值记录',
+      balanceHistoryTitle: '用户充值和并发变动记录',
+      noBalanceHistory: '暂无变动记录',
+      allTypes: '全部类型',
+      typeBalance: '余额（兑换码）',
+      typeAdminBalance: '余额（管理员调整）',
+      typeConcurrency: '并发（兑换码）',
+      typeAdminConcurrency: '并发（管理员调整）',
+      typeSubscription: '订阅',
+      failedToLoadBalanceHistory: '加载余额记录失败',
+      createdAt: '创建时间',
+      totalRecharged: '总充值',
       // Settings Dropdowns
       filterSettings: '筛选设置',
       columnSettings: '列设置',

frontend/src/views/admin/UsersView.vue

@@ -300,8 +300,29 @@
             </span>
           </template>
 
-          <template #cell-balance="{ value }">
+          <template #cell-balance="{ value, row }">
-            <span class="font-medium text-gray-900 dark:text-white">${{ value.toFixed(2) }}</span>
+            <div class="flex items-center gap-2">
+              <div class="group relative">
+                <button
+                  class="font-medium text-gray-900 underline decoration-dashed decoration-gray-300 underline-offset-4 transition-colors hover:text-primary-600 dark:text-white dark:decoration-dark-500 dark:hover:text-primary-400"
+                  @click="handleBalanceHistory(row)"
+                >
+                  ${{ value.toFixed(2) }}
+                </button>
+                <!-- Instant tooltip -->
+                <div class="pointer-events-none absolute bottom-full left-1/2 z-50 mb-1.5 -translate-x-1/2 whitespace-nowrap rounded bg-gray-900 px-2 py-1 text-xs text-white opacity-0 shadow-lg transition-opacity duration-75 group-hover:opacity-100 dark:bg-dark-600">
+                  {{ t('admin.users.balanceHistoryTip') }}
+                  <div class="absolute left-1/2 top-full -translate-x-1/2 border-4 border-transparent border-t-gray-900 dark:border-t-dark-600"></div>
+                </div>
+              </div>
+              <button
+                @click.stop="handleDeposit(row)"
+                class="rounded px-2 py-0.5 text-xs font-medium text-emerald-600 transition-colors hover:bg-emerald-50 dark:text-emerald-400 dark:hover:bg-emerald-900/20"
+                :title="t('admin.users.deposit')"
+              >
+                {{ t('admin.users.deposit') }}
+              </button>
+            </div>
           </template>
 
           <template #cell-usage="{ row }">
@@ -456,6 +477,15 @@
                 {{ t('admin.users.withdraw') }}
               </button>
 
+              <!-- Balance History -->
+              <button
+                @click="handleBalanceHistory(user); closeActionMenu()"
+                class="flex w-full items-center gap-2 px-4 py-2 text-sm text-gray-700 hover:bg-gray-100 dark:text-gray-300 dark:hover:bg-dark-700"
+              >
+                <Icon name="dollar" size="sm" class="text-gray-400" :stroke-width="2" />
+                {{ t('admin.users.balanceHistory') }}
+              </button>
+
               <div class="my-1 border-t border-gray-100 dark:border-dark-700"></div>
 
               <!-- Delete (not for admin) -->
@@ -479,6 +509,7 @@
     <UserApiKeysModal :show="showApiKeysModal" :user="viewingUser" @close="closeApiKeysModal" />
     <UserAllowedGroupsModal :show="showAllowedGroupsModal" :user="allowedGroupsUser" @close="closeAllowedGroupsModal" @success="loadUsers" />
     <UserBalanceModal :show="showBalanceModal" :user="balanceUser" :operation="balanceOperation" @close="closeBalanceModal" @success="loadUsers" />
+    <UserBalanceHistoryModal :show="showBalanceHistoryModal" :user="balanceHistoryUser" @close="closeBalanceHistoryModal" @deposit="handleDepositFromHistory" @withdraw="handleWithdrawFromHistory" />
     <UserAttributesConfigModal :show="showAttributesModal" @close="handleAttributesModalClose" />
   </AppLayout>
 </template>
@@ -509,6 +540,7 @@ import UserEditModal from '@/components/admin/user/UserEditModal.vue'
 import UserApiKeysModal from '@/components/admin/user/UserApiKeysModal.vue'
 import UserAllowedGroupsModal from '@/components/admin/user/UserAllowedGroupsModal.vue'
 import UserBalanceModal from '@/components/admin/user/UserBalanceModal.vue'
+import UserBalanceHistoryModal from '@/components/admin/user/UserBalanceHistoryModal.vue'
 
 const appStore = useAppStore()
 
@@ -828,6 +860,10 @@ const showBalanceModal = ref(false)
 const balanceUser = ref<AdminUser | null>(null)
 const balanceOperation = ref<'add' | 'subtract'>('add')
 
+// Balance History modal state
+const showBalanceHistoryModal = ref(false)
+const balanceHistoryUser = ref<AdminUser | null>(null)
+
 // 计算剩余天数
 const getDaysRemaining = (expiresAt: string): number => {
   const now = new Date()
@@ -1078,6 +1114,30 @@ const closeBalanceModal = () => {
   balanceUser.value = null
 }
 
+const handleBalanceHistory = (user: AdminUser) => {
+  balanceHistoryUser.value = user
+  showBalanceHistoryModal.value = true
+}
+
+const closeBalanceHistoryModal = () => {
+  showBalanceHistoryModal.value = false
+  balanceHistoryUser.value = null
+}
+
+// Handle deposit from balance history modal
+const handleDepositFromHistory = () => {
+  if (balanceHistoryUser.value) {
+    handleDeposit(balanceHistoryUser.value)
+  }
+}
+
+// Handle withdraw from balance history modal
+const handleWithdrawFromHistory = () => {
+  if (balanceHistoryUser.value) {
+    handleWithdraw(balanceHistoryUser.value)
+  }
+}
+
 // 滚动时关闭菜单
 const handleScroll = () => {
   closeActionMenu()