merge: 合并 upstream/main 并保留本地图片计费功能

frontend/src/components/admin/usage/UsageExportProgress.vue

@@ -0,0 +1,16 @@
+<template>
+  <ExportProgressDialog
+    :show="show"
+    :progress="progress"
+    :current="current"
+    :total="total"
+    :estimated-time="estimatedTime"
+    @cancel="$emit('cancel')"
+  />
+</template>
+
+<script setup lang="ts">
+import ExportProgressDialog from '@/components/common/ExportProgressDialog.vue'
+defineProps<{ show: boolean, progress: number, current: number, total: number, estimatedTime: string }>()
+defineEmits(['cancel'])
+</script>

frontend/src/components/admin/usage/UsageFilters.vue

@@ -0,0 +1,353 @@
+<template>
+  <div class="card p-6">
+    <!-- Toolbar: left filters (multi-line) + right actions -->
+    <div class="flex flex-wrap items-end justify-between gap-4">
+      <!-- Left: filters (allowed to wrap to multiple rows) -->
+      <div class="flex flex-1 flex-wrap items-end gap-4">
+        <!-- User Search -->
+        <div ref="userSearchRef" class="usage-filter-dropdown relative w-full sm:w-auto sm:min-w-[240px]">
+          <label class="input-label">{{ t('admin.usage.userFilter') }}</label>
+          <input
+            v-model="userKeyword"
+            type="text"
+            class="input pr-8"
+            :placeholder="t('admin.usage.searchUserPlaceholder')"
+            @input="debounceUserSearch"
+            @focus="showUserDropdown = true"
+          />
+          <button
+            v-if="filters.user_id"
+            type="button"
+            @click="clearUser"
+            class="absolute right-2 top-9 text-gray-400"
+            aria-label="Clear user filter"
+          >
+            ✕
+          </button>
+          <div
+            v-if="showUserDropdown && (userResults.length > 0 || userKeyword)"
+            class="absolute z-50 mt-1 max-h-60 w-full overflow-auto rounded-lg border bg-white shadow-lg dark:bg-gray-800"
+          >
+            <button
+              v-for="u in userResults"
+              :key="u.id"
+              type="button"
+              @click="selectUser(u)"
+              class="w-full px-4 py-2 text-left hover:bg-gray-100 dark:hover:bg-gray-700"
+            >
+              <span>{{ u.email }}</span>
+              <span class="ml-2 text-xs text-gray-400">#{{ u.id }}</span>
+            </button>
+          </div>
+        </div>
+
+        <!-- API Key Search -->
+        <div ref="apiKeySearchRef" class="usage-filter-dropdown relative w-full sm:w-auto sm:min-w-[240px]">
+          <label class="input-label">{{ t('usage.apiKeyFilter') }}</label>
+          <input
+            v-model="apiKeyKeyword"
+            type="text"
+            class="input pr-8"
+            :placeholder="t('admin.usage.searchApiKeyPlaceholder')"
+            @input="debounceApiKeySearch"
+            @focus="showApiKeyDropdown = true"
+          />
+          <button
+            v-if="filters.api_key_id"
+            type="button"
+            @click="onClearApiKey"
+            class="absolute right-2 top-9 text-gray-400"
+            aria-label="Clear API key filter"
+          >
+            ✕
+          </button>
+          <div
+            v-if="showApiKeyDropdown && (apiKeyResults.length > 0 || apiKeyKeyword)"
+            class="absolute z-50 mt-1 max-h-60 w-full overflow-auto rounded-lg border bg-white shadow-lg dark:bg-gray-800"
+          >
+            <button
+              v-for="k in apiKeyResults"
+              :key="k.id"
+              type="button"
+              @click="selectApiKey(k)"
+              class="w-full px-4 py-2 text-left hover:bg-gray-100 dark:hover:bg-gray-700"
+            >
+              <span class="truncate">{{ k.name || `#${k.id}` }}</span>
+              <span class="ml-2 text-xs text-gray-400">#{{ k.id }}</span>
+            </button>
+          </div>
+        </div>
+
+        <!-- Model Filter -->
+        <div class="w-full sm:w-auto sm:min-w-[220px]">
+          <label class="input-label">{{ t('usage.model') }}</label>
+          <Select v-model="filters.model" :options="modelOptions" searchable @change="emitChange" />
+        </div>
+
+        <!-- Account Filter -->
+        <div class="w-full sm:w-auto sm:min-w-[220px]">
+          <label class="input-label">{{ t('admin.usage.account') }}</label>
+          <Select v-model="filters.account_id" :options="accountOptions" searchable @change="emitChange" />
+        </div>
+
+        <!-- Stream Type Filter -->
+        <div class="w-full sm:w-auto sm:min-w-[180px]">
+          <label class="input-label">{{ t('usage.type') }}</label>
+          <Select v-model="filters.stream" :options="streamTypeOptions" @change="emitChange" />
+        </div>
+
+        <!-- Billing Type Filter -->
+        <div class="w-full sm:w-auto sm:min-w-[180px]">
+          <label class="input-label">{{ t('usage.billingType') }}</label>
+          <Select v-model="filters.billing_type" :options="billingTypeOptions" @change="emitChange" />
+        </div>
+
+        <!-- Group Filter -->
+        <div class="w-full sm:w-auto sm:min-w-[200px]">
+          <label class="input-label">{{ t('admin.usage.group') }}</label>
+          <Select v-model="filters.group_id" :options="groupOptions" searchable @change="emitChange" />
+        </div>
+
+        <!-- Date Range Filter -->
+        <div class="w-full sm:w-auto [&_.date-picker-trigger]:w-full">
+          <label class="input-label">{{ t('usage.timeRange') }}</label>
+          <DateRangePicker
+            :start-date="startDate"
+            :end-date="endDate"
+            @update:startDate="updateStartDate"
+            @update:endDate="updateEndDate"
+            @change="emitChange"
+          />
+        </div>
+      </div>
+
+      <!-- Right: actions -->
+      <div class="flex w-full flex-wrap items-center justify-end gap-3 sm:w-auto">
+        <button type="button" @click="$emit('reset')" class="btn btn-secondary">
+          {{ t('common.reset') }}
+        </button>
+        <button type="button" @click="$emit('export')" :disabled="exporting" class="btn btn-primary">
+          {{ t('usage.exportExcel') }}
+        </button>
+      </div>
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { ref, onMounted, onUnmounted, toRef, watch } from 'vue'
+import { useI18n } from 'vue-i18n'
+import { adminAPI } from '@/api/admin'
+import Select, { type SelectOption } from '@/components/common/Select.vue'
+import DateRangePicker from '@/components/common/DateRangePicker.vue'
+import type { SimpleApiKey, SimpleUser } from '@/api/admin/usage'
+
+type ModelValue = Record<string, any>
+
+interface Props {
+  modelValue: ModelValue
+  exporting: boolean
+  startDate: string
+  endDate: string
+}
+
+const props = defineProps<Props>()
+const emit = defineEmits([
+  'update:modelValue',
+  'update:startDate',
+  'update:endDate',
+  'change',
+  'reset',
+  'export'
+])
+
+const { t } = useI18n()
+const filters = toRef(props, 'modelValue')
+
+const userSearchRef = ref<HTMLElement | null>(null)
+const apiKeySearchRef = ref<HTMLElement | null>(null)
+
+const userKeyword = ref('')
+const userResults = ref<SimpleUser[]>([])
+const showUserDropdown = ref(false)
+let userSearchTimeout: ReturnType<typeof setTimeout> | null = null
+
+const apiKeyKeyword = ref('')
+const apiKeyResults = ref<SimpleApiKey[]>([])
+const showApiKeyDropdown = ref(false)
+let apiKeySearchTimeout: ReturnType<typeof setTimeout> | null = null
+
+const modelOptions = ref<SelectOption[]>([{ value: null, label: t('admin.usage.allModels') }])
+const groupOptions = ref<SelectOption[]>([{ value: null, label: t('admin.usage.allGroups') }])
+const accountOptions = ref<SelectOption[]>([{ value: null, label: t('admin.usage.allAccounts') }])
+
+const streamTypeOptions = ref<SelectOption[]>([
+  { value: null, label: t('admin.usage.allTypes') },
+  { value: true, label: t('usage.stream') },
+  { value: false, label: t('usage.sync') }
+])
+
+const billingTypeOptions = ref<SelectOption[]>([
+  { value: null, label: t('admin.usage.allBillingTypes') },
+  { value: 1, label: t('usage.subscription') },
+  { value: 0, label: t('usage.balance') }
+])
+
+const emitChange = () => emit('change')
+
+const updateStartDate = (value: string) => {
+  emit('update:startDate', value)
+  filters.value.start_date = value
+}
+
+const updateEndDate = (value: string) => {
+  emit('update:endDate', value)
+  filters.value.end_date = value
+}
+
+const debounceUserSearch = () => {
+  if (userSearchTimeout) clearTimeout(userSearchTimeout)
+  userSearchTimeout = setTimeout(async () => {
+    if (!userKeyword.value) {
+      userResults.value = []
+      return
+    }
+    try {
+      userResults.value = await adminAPI.usage.searchUsers(userKeyword.value)
+    } catch {
+      userResults.value = []
+    }
+  }, 300)
+}
+
+const debounceApiKeySearch = () => {
+  if (apiKeySearchTimeout) clearTimeout(apiKeySearchTimeout)
+  apiKeySearchTimeout = setTimeout(async () => {
+    if (!apiKeyKeyword.value) {
+      apiKeyResults.value = []
+      return
+    }
+    try {
+      apiKeyResults.value = await adminAPI.usage.searchApiKeys(
+        filters.value.user_id,
+        apiKeyKeyword.value
+      )
+    } catch {
+      apiKeyResults.value = []
+    }
+  }, 300)
+}
+
+const selectUser = (u: SimpleUser) => {
+  userKeyword.value = u.email
+  showUserDropdown.value = false
+  filters.value.user_id = u.id
+  clearApiKey()
+  emitChange()
+}
+
+const clearUser = () => {
+  userKeyword.value = ''
+  userResults.value = []
+  showUserDropdown.value = false
+  filters.value.user_id = undefined
+  clearApiKey()
+  emitChange()
+}
+
+const selectApiKey = (k: SimpleApiKey) => {
+  apiKeyKeyword.value = k.name || String(k.id)
+  showApiKeyDropdown.value = false
+  filters.value.api_key_id = k.id
+  emitChange()
+}
+
+const clearApiKey = () => {
+  apiKeyKeyword.value = ''
+  apiKeyResults.value = []
+  showApiKeyDropdown.value = false
+  filters.value.api_key_id = undefined
+}
+
+const onClearApiKey = () => {
+  clearApiKey()
+  emitChange()
+}
+
+const onDocumentClick = (e: MouseEvent) => {
+  const target = e.target as Node | null
+  if (!target) return
+
+  const clickedInsideUser = userSearchRef.value?.contains(target) ?? false
+  const clickedInsideApiKey = apiKeySearchRef.value?.contains(target) ?? false
+
+  if (!clickedInsideUser) showUserDropdown.value = false
+  if (!clickedInsideApiKey) showApiKeyDropdown.value = false
+}
+
+watch(
+  () => props.startDate,
+  (value) => {
+    filters.value.start_date = value
+  },
+  { immediate: true }
+)
+
+watch(
+  () => props.endDate,
+  (value) => {
+    filters.value.end_date = value
+  },
+  { immediate: true }
+)
+
+watch(
+  () => filters.value.user_id,
+  (userId) => {
+    if (!userId) {
+      userKeyword.value = ''
+      userResults.value = []
+    }
+  }
+)
+
+watch(
+  () => filters.value.api_key_id,
+  (apiKeyId) => {
+    if (!apiKeyId) {
+      apiKeyKeyword.value = ''
+      apiKeyResults.value = []
+    }
+  }
+)
+
+onMounted(async () => {
+  document.addEventListener('click', onDocumentClick)
+
+  try {
+    const [gs, ms, as] = await Promise.all([
+      adminAPI.groups.list(1, 1000),
+      adminAPI.dashboard.getModelStats({ start_date: props.startDate, end_date: props.endDate }),
+      adminAPI.accounts.list(1, 1000)
+    ])
+
+    groupOptions.value.push(...gs.items.map((g: any) => ({ value: g.id, label: g.name })))
+
+    accountOptions.value.push(...as.items.map((a: any) => ({ value: a.id, label: a.name })))
+
+    const uniqueModels = new Set<string>()
+    ms.models?.forEach((s: any) => s.model && uniqueModels.add(s.model))
+    modelOptions.value.push(
+      ...Array.from(uniqueModels)
+        .sort()
+        .map((m) => ({ value: m, label: m }))
+    )
+  } catch {
+    // Ignore filter option loading errors (page still usable)
+  }
+})
+
+onUnmounted(() => {
+  document.removeEventListener('click', onDocumentClick)
+})
+</script>

frontend/src/components/admin/usage/UsageStatsCards.vue

@@ -0,0 +1,46 @@
+<template>
+  <div class="grid grid-cols-2 gap-4 lg:grid-cols-4">
+    <div class="card p-4 flex items-center gap-3">
+      <div class="rounded-lg bg-blue-100 p-2 dark:bg-blue-900/30 text-blue-600">
+        <Icon name="document" size="md" />
+      </div>
+      <div><p class="text-xs font-medium text-gray-500">{{ t('usage.totalRequests') }}</p><p class="text-xl font-bold">{{ stats?.total_requests?.toLocaleString() || '0' }}</p></div>
+    </div>
+    <div class="card p-4 flex items-center gap-3">
+      <div class="rounded-lg bg-amber-100 p-2 dark:bg-amber-900/30 text-amber-600"><svg class="h-5 w-5" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="m21 7.5-9-5.25L3 7.5m18 0-9 5.25m9-5.25v9l-9 5.25M3 7.5l9 5.25M3 7.5v9l9 5.25m0-9v9" /></svg></div>
+      <div><p class="text-xs font-medium text-gray-500">{{ t('usage.totalTokens') }}</p><p class="text-xl font-bold">{{ formatTokens(stats?.total_tokens || 0) }}</p></div>
+    </div>
+    <div class="card p-4 flex items-center gap-3">
+      <div class="rounded-lg bg-green-100 p-2 dark:bg-green-900/30 text-green-600">
+        <Icon name="dollar" size="md" />
+      </div>
+      <div><p class="text-xs font-medium text-gray-500">{{ t('usage.totalCost') }}</p><p class="text-xl font-bold text-green-600">${{ (stats?.total_actual_cost || 0).toFixed(4) }}</p></div>
+    </div>
+    <div class="card p-4 flex items-center gap-3">
+      <div class="rounded-lg bg-purple-100 p-2 dark:bg-purple-900/30 text-purple-600">
+        <Icon name="clock" size="md" />
+      </div>
+      <div><p class="text-xs font-medium text-gray-500">{{ t('usage.avgDuration') }}</p><p class="text-xl font-bold">{{ formatDuration(stats?.average_duration_ms || 0) }}</p></div>
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { useI18n } from 'vue-i18n'
+import type { AdminUsageStatsResponse } from '@/api/admin/usage'
+import Icon from '@/components/icons/Icon.vue'
+
+defineProps<{ stats: AdminUsageStatsResponse | null }>()
+
+const { t } = useI18n()
+
+const formatDuration = (ms: number) =>
+  ms < 1000 ? `${ms.toFixed(0)}ms` : `${(ms / 1000).toFixed(2)}s`
+
+const formatTokens = (value: number) => {
+  if (value >= 1e9) return (value / 1e9).toFixed(2) + 'B'
+  if (value >= 1e6) return (value / 1e6).toFixed(2) + 'M'
+  if (value >= 1e3) return (value / 1e3).toFixed(2) + 'K'
+  return value.toLocaleString()
+}
+</script>

frontend/src/components/admin/usage/UsageTable.vue

@@ -0,0 +1,163 @@
+<template>
+  <div class="card overflow-hidden">
+    <div class="overflow-auto">
+      <DataTable :columns="cols" :data="data" :loading="loading">
+        <template #cell-user="{ row }">
+          <div class="text-sm">
+            <span class="font-medium text-gray-900 dark:text-white">{{ row.user?.email || '-' }}</span>
+            <span class="ml-1 text-gray-500 dark:text-gray-400">#{{ row.user_id }}</span>
+          </div>
+        </template>
+
+        <template #cell-api_key="{ row }">
+          <span class="text-sm text-gray-900 dark:text-white">{{ row.api_key?.name || '-' }}</span>
+        </template>
+
+        <template #cell-account="{ row }">
+          <span class="text-sm text-gray-900 dark:text-white">{{ row.account?.name || '-' }}</span>
+        </template>
+
+        <template #cell-model="{ value }">
+          <span class="font-medium text-gray-900 dark:text-white">{{ value }}</span>
+        </template>
+
+        <template #cell-group="{ row }">
+          <span v-if="row.group" class="inline-flex items-center rounded px-2 py-0.5 text-xs font-medium bg-indigo-100 text-indigo-800 dark:bg-indigo-900 dark:text-indigo-200">
+            {{ row.group.name }}
+          </span>
+          <span v-else class="text-sm text-gray-400 dark:text-gray-500">-</span>
+        </template>
+
+        <template #cell-stream="{ row }">
+          <span class="inline-flex items-center rounded px-2 py-0.5 text-xs font-medium" :class="row.stream ? 'bg-blue-100 text-blue-800 dark:bg-blue-900 dark:text-blue-200' : 'bg-gray-100 text-gray-800 dark:bg-gray-700 dark:text-gray-200'">
+            {{ row.stream ? t('usage.stream') : t('usage.sync') }}
+          </span>
+        </template>
+
+        <template #cell-tokens="{ row }">
+          <!-- 图片生成请求 -->
+          <div v-if="row.image_count > 0" class="flex items-center gap-1.5">
+            <svg class="h-4 w-4 text-indigo-500" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+              <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4 16l4.586-4.586a2 2 0 012.828 0L16 16m-2-2l1.586-1.586a2 2 0 012.828 0L20 14m-6-6h.01M6 20h12a2 2 0 002-2V6a2 2 0 00-2-2H6a2 2 0 00-2 2v12a2 2 0 002 2z" />
+            </svg>
+            <span class="font-medium text-gray-900 dark:text-white">{{ row.image_count }}{{ t('usage.imageUnit') }}</span>
+            <span class="text-gray-400">({{ row.image_size || '2K' }})</span>
+          </div>
+          <!-- Token 请求 -->
+          <div v-else class="space-y-1 text-sm">
+            <div class="flex items-center gap-2">
+              <div class="inline-flex items-center gap-1">
+                <Icon name="arrowDown" size="sm" class="h-3.5 w-3.5 text-emerald-500" />
+                <span class="font-medium text-gray-900 dark:text-white">{{ row.input_tokens?.toLocaleString() || 0 }}</span>
+              </div>
+              <div class="inline-flex items-center gap-1">
+                <Icon name="arrowUp" size="sm" class="h-3.5 w-3.5 text-violet-500" />
+                <span class="font-medium text-gray-900 dark:text-white">{{ row.output_tokens?.toLocaleString() || 0 }}</span>
+              </div>
+            </div>
+            <div v-if="row.cache_read_tokens > 0 || row.cache_creation_tokens > 0" class="flex items-center gap-2">
+              <div v-if="row.cache_read_tokens > 0" class="inline-flex items-center gap-1">
+                <svg class="h-3.5 w-3.5 text-sky-500" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M5 8h14M5 8a2 2 0 110-4h14a2 2 0 110 4M5 8v10a2 2 0 002 2h10a2 2 0 002-2V8m-9 4h4" /></svg>
+                <span class="font-medium text-sky-600 dark:text-sky-400">{{ formatCacheTokens(row.cache_read_tokens) }}</span>
+              </div>
+              <div v-if="row.cache_creation_tokens > 0" class="inline-flex items-center gap-1">
+                <svg class="h-3.5 w-3.5 text-amber-500" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M11 5H6a2 2 0 00-2 2v11a2 2 0 002 2h11a2 2 0 002-2v-5m-1.414-9.414a2 2 0 112.828 2.828L11.828 15H9v-2.828l8.586-8.586z" /></svg>
+                <span class="font-medium text-amber-600 dark:text-amber-400">{{ formatCacheTokens(row.cache_creation_tokens) }}</span>
+              </div>
+            </div>
+          </div>
+        </template>
+
+        <template #cell-cost="{ row }">
+          <span class="font-medium text-green-600 dark:text-green-400">${{ row.actual_cost?.toFixed(6) || '0.000000' }}</span>
+        </template>
+
+        <template #cell-billing_type="{ row }">
+          <span class="inline-flex items-center rounded px-2 py-0.5 text-xs font-medium" :class="row.billing_type === 1 ? 'bg-purple-100 text-purple-800 dark:bg-purple-900 dark:text-purple-200' : 'bg-emerald-100 text-emerald-800 dark:bg-emerald-900 dark:text-emerald-200'">
+            {{ row.billing_type === 1 ? t('usage.subscription') : t('usage.balance') }}
+          </span>
+        </template>
+
+        <template #cell-first_token="{ row }">
+          <span v-if="row.first_token_ms != null" class="text-sm text-gray-600 dark:text-gray-400">{{ formatDuration(row.first_token_ms) }}</span>
+          <span v-else class="text-sm text-gray-400 dark:text-gray-500">-</span>
+        </template>
+
+        <template #cell-duration="{ row }">
+          <span class="text-sm text-gray-600 dark:text-gray-400">{{ formatDuration(row.duration_ms) }}</span>
+        </template>
+
+        <template #cell-created_at="{ value }">
+          <span class="text-sm text-gray-600 dark:text-gray-400">{{ formatDateTime(value) }}</span>
+        </template>
+
+        <template #cell-request_id="{ row }">
+          <div v-if="row.request_id" class="flex items-center gap-1.5 max-w-[120px]">
+            <span class="font-mono text-xs text-gray-500 dark:text-gray-400 truncate" :title="row.request_id">{{ row.request_id }}</span>
+            <button @click="copyRequestId(row.request_id)" class="flex-shrink-0 rounded p-0.5 transition-colors hover:bg-gray-100 dark:hover:bg-dark-700" :class="copiedRequestId === row.request_id ? 'text-green-500' : 'text-gray-400 hover:text-gray-600 dark:hover:text-gray-300'" :title="copiedRequestId === row.request_id ? t('keys.copied') : t('keys.copyToClipboard')">
+              <svg v-if="copiedRequestId === row.request_id" class="h-3.5 w-3.5" fill="none" stroke="currentColor" viewBox="0 0 24 24" stroke-width="2"><path stroke-linecap="round" stroke-linejoin="round" d="M5 13l4 4L19 7" /></svg>
+              <Icon v-else name="copy" size="sm" class="h-3.5 w-3.5" />
+            </button>
+          </div>
+          <span v-else class="text-gray-400 dark:text-gray-500">-</span>
+        </template>
+
+        <template #empty><EmptyState :message="t('usage.noRecords')" /></template>
+      </DataTable>
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { ref, computed } from 'vue'
+import { useI18n } from 'vue-i18n'
+import { formatDateTime } from '@/utils/format'
+import { useAppStore } from '@/stores/app'
+import DataTable from '@/components/common/DataTable.vue'
+import EmptyState from '@/components/common/EmptyState.vue'
+import Icon from '@/components/icons/Icon.vue'
+
+defineProps(['data', 'loading'])
+const { t } = useI18n()
+const appStore = useAppStore()
+const copiedRequestId = ref<string | null>(null)
+
+const cols = computed(() => [
+  { key: 'user', label: t('admin.usage.user'), sortable: false },
+  { key: 'api_key', label: t('usage.apiKeyFilter'), sortable: false },
+  { key: 'account', label: t('admin.usage.account'), sortable: false },
+  { key: 'model', label: t('usage.model'), sortable: true },
+  { key: 'group', label: t('admin.usage.group'), sortable: false },
+  { key: 'stream', label: t('usage.type'), sortable: false },
+  { key: 'tokens', label: t('usage.tokens'), sortable: false },
+  { key: 'cost', label: t('usage.cost'), sortable: false },
+  { key: 'billing_type', label: t('usage.billingType'), sortable: false },
+  { key: 'first_token', label: t('usage.firstToken'), sortable: false },
+  { key: 'duration', label: t('usage.duration'), sortable: false },
+  { key: 'created_at', label: t('usage.time'), sortable: true },
+  { key: 'request_id', label: t('admin.usage.requestId'), sortable: false }
+])
+
+const formatCacheTokens = (tokens: number): string => {
+  if (tokens >= 1000000) return `${(tokens / 1000000).toFixed(1)}M`
+  if (tokens >= 1000) return `${(tokens / 1000).toFixed(1)}K`
+  return tokens.toString()
+}
+
+const formatDuration = (ms: number | null | undefined): string => {
+  if (ms == null) return '-'
+  if (ms < 1000) return `${ms}ms`
+  return `${(ms / 1000).toFixed(2)}s`
+}
+
+const copyRequestId = async (requestId: string) => {
+  try {
+    await navigator.clipboard.writeText(requestId)
+    copiedRequestId.value = requestId
+    appStore.showSuccess(t('admin.usage.requestIdCopied'))
+    setTimeout(() => { copiedRequestId.value = null }, 2000)
+  } catch {
+    appStore.showError(t('common.copyFailed'))
+  }
+}
+</script>