feat(计费): 支持账号计费倍率快照与统计展示

- 新增 accounts.rate_multiplier（默认 1.0，允许 0）
- 使用 usage_logs.account_rate_multiplier 记录倍率快照，避免历史回算
- 统计/导出/管理端展示账号口径费用（total_cost * account_rate_multiplier）

frontend/src/components/admin/account/AccountStatsModal.vue

@@ -61,11 +61,12 @@
             </p>
             <p class="mt-1 text-xs text-gray-500 dark:text-gray-400">
               {{ t('admin.accounts.stats.accumulatedCost') }}
-              <span class="text-gray-400 dark:text-gray-500"
-                >({{ t('admin.accounts.stats.standardCost') }}: ${{
+              <span class="text-gray-400 dark:text-gray-500">
+                ({{ t('usage.userBilled') }}: ${{ formatCost(stats.summary.total_user_cost) }} ·
+                {{ t('admin.accounts.stats.standardCost') }}: ${{
                   formatCost(stats.summary.total_standard_cost)
-                }})</span
-              >
+                }})
+              </span>
             </p>
           </div>
 
@@ -114,6 +115,9 @@
                   days: stats.summary.actual_days_used
                 })
               }}
+              <span class="text-gray-400 dark:text-gray-500">
+                ({{ t('usage.userBilled') }}: ${{ formatCost(stats.summary.avg_daily_user_cost) }})
+              </span>
             </p>
           </div>
 
@@ -164,13 +168,17 @@
             </div>
             <div class="space-y-2">
               <div class="flex items-center justify-between">
-                <span class="text-xs text-gray-500 dark:text-gray-400">{{
-                  t('admin.accounts.stats.cost')
-                }}</span>
+                <span class="text-xs text-gray-500 dark:text-gray-400">{{ t('usage.accountBilled') }}</span>
                 <span class="text-sm font-semibold text-gray-900 dark:text-white"
                   >${{ formatCost(stats.summary.today?.cost || 0) }}</span
                 >
               </div>
+              <div class="flex items-center justify-between">
+                <span class="text-xs text-gray-500 dark:text-gray-400">{{ t('usage.userBilled') }}</span>
+                <span class="text-sm font-semibold text-gray-900 dark:text-white"
+                  >${{ formatCost(stats.summary.today?.user_cost || 0) }}</span
+                >
+              </div>
               <div class="flex items-center justify-between">
                 <span class="text-xs text-gray-500 dark:text-gray-400">{{
                   t('admin.accounts.stats.requests')
@@ -210,13 +218,17 @@
                 }}</span>
               </div>
               <div class="flex items-center justify-between">
-                <span class="text-xs text-gray-500 dark:text-gray-400">{{
-                  t('admin.accounts.stats.cost')
-                }}</span>
+                <span class="text-xs text-gray-500 dark:text-gray-400">{{ t('usage.accountBilled') }}</span>
                 <span class="text-sm font-semibold text-orange-600 dark:text-orange-400"
                   >${{ formatCost(stats.summary.highest_cost_day?.cost || 0) }}</span
                 >
               </div>
+              <div class="flex items-center justify-between">
+                <span class="text-xs text-gray-500 dark:text-gray-400">{{ t('usage.userBilled') }}</span>
+                <span class="text-sm font-semibold text-gray-900 dark:text-white"
+                  >${{ formatCost(stats.summary.highest_cost_day?.user_cost || 0) }}</span
+                >
+              </div>
               <div class="flex items-center justify-between">
                 <span class="text-xs text-gray-500 dark:text-gray-400">{{
                   t('admin.accounts.stats.requests')
@@ -260,13 +272,17 @@
                 }}</span>
               </div>
               <div class="flex items-center justify-between">
-                <span class="text-xs text-gray-500 dark:text-gray-400">{{
-                  t('admin.accounts.stats.cost')
-                }}</span>
+                <span class="text-xs text-gray-500 dark:text-gray-400">{{ t('usage.accountBilled') }}</span>
                 <span class="text-sm font-semibold text-gray-900 dark:text-white"
                   >${{ formatCost(stats.summary.highest_request_day?.cost || 0) }}</span
                 >
               </div>
+              <div class="flex items-center justify-between">
+                <span class="text-xs text-gray-500 dark:text-gray-400">{{ t('usage.userBilled') }}</span>
+                <span class="text-sm font-semibold text-gray-900 dark:text-white"
+                  >${{ formatCost(stats.summary.highest_request_day?.user_cost || 0) }}</span
+                >
+              </div>
             </div>
           </div>
         </div>
@@ -485,14 +501,24 @@ const trendChartData = computed(() => {
     labels: stats.value.history.map((h) => h.label),
     datasets: [
       {
-        label: t('admin.accounts.stats.cost') + ' (USD)',
-        data: stats.value.history.map((h) => h.cost),
+        label: t('usage.accountBilled') + ' (USD)',
+        data: stats.value.history.map((h) => h.actual_cost),
         borderColor: '#3b82f6',
         backgroundColor: 'rgba(59, 130, 246, 0.1)',
         fill: true,
         tension: 0.3,
         yAxisID: 'y'
       },
+      {
+        label: t('usage.userBilled') + ' (USD)',
+        data: stats.value.history.map((h) => h.user_cost),
+        borderColor: '#10b981',
+        backgroundColor: 'rgba(16, 185, 129, 0.08)',
+        fill: false,
+        tension: 0.3,
+        borderDash: [5, 5],
+        yAxisID: 'y'
+      },
       {
         label: t('admin.accounts.stats.requests'),
         data: stats.value.history.map((h) => h.requests),
@@ -570,7 +596,7 @@ const lineChartOptions = computed(() => ({
       },
       title: {
         display: true,
-        text: t('admin.accounts.stats.cost') + ' (USD)',
+        text: t('usage.accountBilled') + ' (USD)',
         color: '#3b82f6',
         font: {
           size: 11

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

@@ -27,9 +27,18 @@
       </div>
       <div class="min-w-0 flex-1">
         <p class="text-xs font-medium text-gray-500">{{ t('usage.totalCost') }}</p>
-        <p class="text-xl font-bold text-green-600">${{ (stats?.total_actual_cost || 0).toFixed(4) }}</p>
-        <p class="text-xs text-gray-400">
-          {{ t('usage.standardCost') }}: <span class="line-through">${{ (stats?.total_cost || 0).toFixed(4) }}</span>
+        <p class="text-xl font-bold text-green-600">
+          ${{ ((stats?.total_account_cost ?? stats?.total_actual_cost) || 0).toFixed(4) }}
+        </p>
+        <p class="text-xs text-gray-400" v-if="stats?.total_account_cost != null">
+          {{ t('usage.userBilled') }}:
+          <span class="text-gray-300">${{ (stats?.total_actual_cost || 0).toFixed(4) }}</span>
+          · {{ t('usage.standardCost') }}:
+          <span class="text-gray-300">${{ (stats?.total_cost || 0).toFixed(4) }}</span>
+        </p>
+        <p class="text-xs text-gray-400" v-else>
+          {{ t('usage.standardCost') }}:
+          <span class="line-through">${{ (stats?.total_cost || 0).toFixed(4) }}</span>
         </p>
       </div>
     </div>

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

@@ -81,7 +81,8 @@
         </template>
 
         <template #cell-cost="{ row }">
-          <div class="flex items-center gap-1.5 text-sm">
+          <div class="text-sm">
+            <div class="flex items-center gap-1.5">
               <span class="font-medium text-green-600 dark:text-green-400">${{ row.actual_cost?.toFixed(6) || '0.000000' }}</span>
               <!-- Cost Detail Tooltip -->
               <div
@@ -94,6 +95,10 @@
                 </div>
               </div>
             </div>
+            <div v-if="row.account_rate_multiplier != null" class="mt-0.5 text-[11px] text-gray-400">
+              A ${{ (row.total_cost * row.account_rate_multiplier).toFixed(6) }}
+            </div>
+          </div>
         </template>
 
         <template #cell-first_token="{ row }">
@@ -202,14 +207,24 @@
             <span class="text-gray-400">{{ t('usage.rate') }}</span>
             <span class="font-semibold text-blue-400">{{ (tooltipData?.rate_multiplier || 1).toFixed(2) }}x</span>
           </div>
+          <div class="flex items-center justify-between gap-6">
+            <span class="text-gray-400">{{ t('usage.accountMultiplier') }}</span>
+            <span class="font-semibold text-blue-400">{{ (tooltipData?.account_rate_multiplier ?? 1).toFixed(2) }}x</span>
+          </div>
           <div class="flex items-center justify-between gap-6">
             <span class="text-gray-400">{{ t('usage.original') }}</span>
             <span class="font-medium text-white">${{ tooltipData?.total_cost?.toFixed(6) || '0.000000' }}</span>
           </div>
-          <div class="flex items-center justify-between gap-6 border-t border-gray-700 pt-1.5">
-            <span class="text-gray-400">{{ t('usage.billed') }}</span>
+          <div class="flex items-center justify-between gap-6">
+            <span class="text-gray-400">{{ t('usage.userBilled') }}</span>
             <span class="font-semibold text-green-400">${{ tooltipData?.actual_cost?.toFixed(6) || '0.000000' }}</span>
           </div>
+          <div class="flex items-center justify-between gap-6 border-t border-gray-700 pt-1.5">
+            <span class="text-gray-400">{{ t('usage.accountBilled') }}</span>
+            <span class="font-semibold text-green-400">
+              ${{ (((tooltipData?.total_cost || 0) * (tooltipData?.account_rate_multiplier ?? 1)) || 0).toFixed(6) }}
+            </span>
+          </div>
         </div>
         <div class="absolute right-full top-1/2 h-0 w-0 -translate-y-1/2 border-b-[6px] border-r-[6px] border-t-[6px] border-b-transparent border-r-gray-900 border-t-transparent dark:border-r-gray-800"></div>
       </div>

frontend/src/i18n/locales/en.ts

@@ -429,6 +429,9 @@ export default {
     totalCost: 'Total Cost',
     standardCost: 'Standard',
     actualCost: 'Actual',
+    userBilled: 'User billed',
+    accountBilled: 'Account billed',
+    accountMultiplier: 'Account rate',
     avgDuration: 'Avg Duration',
     inSelectedRange: 'in selected range',
     perRequest: 'per request',
@@ -1058,6 +1061,7 @@ export default {
         concurrencyStatus: 'Concurrency',
         notes: 'Notes',
         priority: 'Priority',
+        billingRateMultiplier: 'Billing Rate',
         weight: 'Weight',
         status: 'Status',
         schedulable: 'Schedulable',
@@ -1225,6 +1229,8 @@ export default {
       concurrency: 'Concurrency',
       priority: 'Priority',
       priorityHint: 'Lower value accounts are used first',
+      billingRateMultiplier: 'Billing Rate Multiplier',
+      billingRateMultiplierHint: '>=0, 0 means free. Affects account billing only',
       expiresAt: 'Expires At',
       expiresAtHint: 'Leave empty for no expiration',
       higherPriorityFirst: 'Lower value means higher priority',

frontend/src/i18n/locales/zh.ts

@@ -426,6 +426,9 @@ export default {
     totalCost: '总消费',
     standardCost: '标准',
     actualCost: '实际',
+    userBilled: '用户扣费',
+    accountBilled: '账号计费',
+    accountMultiplier: '账号倍率',
     avgDuration: '平均耗时',
     inSelectedRange: '所选范围内',
     perRequest: '每次请求',
@@ -1108,6 +1111,7 @@ export default {
         concurrencyStatus: '并发',
         notes: '备注',
         priority: '优先级',
+        billingRateMultiplier: '账号倍率',
         weight: '权重',
         status: '状态',
         schedulable: '调度',
@@ -1359,6 +1363,8 @@ export default {
       concurrency: '并发数',
       priority: '优先级',
       priorityHint: '优先级越小的账号优先使用',
+      billingRateMultiplier: '账号计费倍率',
+      billingRateMultiplierHint: '>=0，0 表示该账号计费为 0；仅影响账号计费口径',
       expiresAt: '过期时间',
       expiresAtHint: '留空表示不过期',
       higherPriorityFirst: '数值越小优先级越高',

frontend/src/types/index.ts

@@ -428,6 +428,7 @@ export interface Account {
   concurrency: number
   current_concurrency?: number // Real-time concurrency count from Redis
   priority: number
+  rate_multiplier?: number // Account billing multiplier (>=0, 0 means free)
   status: 'active' | 'inactive' | 'error'
   error_message: string | null
   last_used_at: string | null
@@ -457,7 +458,9 @@ export interface Account {
 export interface WindowStats {
   requests: number
   tokens: number
-  cost: number
+  cost: number // Account cost (account multiplier)
+  standard_cost?: number
+  user_cost?: number
 }
 
 export interface UsageProgress {
@@ -522,6 +525,7 @@ export interface CreateAccountRequest {
   proxy_id?: number | null
   concurrency?: number
   priority?: number
+  rate_multiplier?: number // Account billing multiplier (>=0, 0 means free)
   group_ids?: number[]
   expires_at?: number | null
   auto_pause_on_expired?: boolean
@@ -537,6 +541,7 @@ export interface UpdateAccountRequest {
   proxy_id?: number | null
   concurrency?: number
   priority?: number
+  rate_multiplier?: number // Account billing multiplier (>=0, 0 means free)
   schedulable?: boolean
   status?: 'active' | 'inactive'
   group_ids?: number[]
@@ -593,6 +598,7 @@ export interface UsageLog {
   total_cost: number
   actual_cost: number
   rate_multiplier: number
+  account_rate_multiplier?: number | null
 
   stream: boolean
   duration_ms: number
@@ -852,23 +858,27 @@ export interface AccountUsageHistory {
   requests: number
   tokens: number
   cost: number
-  actual_cost: number
+  actual_cost: number // Account cost (account multiplier)
+  user_cost: number // User/API key billed cost (group multiplier)
 }
 
 export interface AccountUsageSummary {
   days: number
   actual_days_used: number
-  total_cost: number
+  total_cost: number // Account cost (account multiplier)
+  total_user_cost: number
   total_standard_cost: number
   total_requests: number
   total_tokens: number
-  avg_daily_cost: number
+  avg_daily_cost: number // Account cost
+  avg_daily_user_cost: number
   avg_daily_requests: number
   avg_daily_tokens: number
   avg_duration_ms: number
   today: {
     date: string
     cost: number
+    user_cost: number
     requests: number
     tokens: number
   } | null
@@ -876,6 +886,7 @@ export interface AccountUsageSummary {
     date: string
     label: string
     cost: number
+    user_cost: number
     requests: number
   } | null
   highest_request_day: {
@@ -883,6 +894,7 @@ export interface AccountUsageSummary {
     label: string
     requests: number
     cost: number
+    user_cost: number
   } | null
 }
 

frontend/src/views/admin/AccountsView.vue

@@ -61,6 +61,11 @@
           <template #cell-usage="{ row }">
             <AccountUsageCell :account="row" />
           </template>
+          <template #cell-rate_multiplier="{ row }">
+            <span class="text-sm font-mono text-gray-700 dark:text-gray-300">
+              {{ (row.rate_multiplier ?? 1).toFixed(2) }}x
+            </span>
+          </template>
           <template #cell-priority="{ value }">
             <span class="text-sm text-gray-700 dark:text-gray-300">{{ value }}</span>
           </template>
@@ -193,6 +198,7 @@ const cols = computed(() => {
     c.push(
       { key: 'usage', label: t('admin.accounts.columns.usageWindows'), sortable: false },
       { key: 'priority', label: t('admin.accounts.columns.priority'), sortable: true },
+      { key: 'rate_multiplier', label: t('admin.accounts.columns.billingRateMultiplier'), sortable: true },
       { key: 'last_used_at', label: t('admin.accounts.columns.lastUsed'), sortable: true },
     { key: 'expires_at', label: t('admin.accounts.columns.expiresAt'), sortable: true },
     { key: 'notes', label: t('admin.accounts.columns.notes'), sortable: false },

frontend/src/views/admin/UsageView.vue

@@ -94,7 +94,7 @@ const exportToExcel = async () => {
         t('admin.usage.cacheReadTokens'), t('admin.usage.cacheCreationTokens'),
         t('admin.usage.inputCost'), t('admin.usage.outputCost'),
         t('admin.usage.cacheReadCost'), t('admin.usage.cacheCreationCost'),
-        t('usage.rate'), t('usage.original'), t('usage.billed'),
+        t('usage.rate'), t('usage.accountMultiplier'), t('usage.original'), t('usage.userBilled'), t('usage.accountBilled'),
         t('usage.firstToken'), t('usage.duration'),
         t('admin.usage.requestId'), t('usage.userAgent'), t('admin.usage.ipAddress')
       ]
@@ -115,8 +115,10 @@ const exportToExcel = async () => {
         log.cache_read_cost?.toFixed(6) || '0.000000',
         log.cache_creation_cost?.toFixed(6) || '0.000000',
         log.rate_multiplier?.toFixed(2) || '1.00',
+        (log.account_rate_multiplier ?? 1).toFixed(2),
         log.total_cost?.toFixed(6) || '0.000000',
         log.actual_cost?.toFixed(6) || '0.000000',
+        (log.total_cost * (log.account_rate_multiplier ?? 1)).toFixed(6),
         log.first_token_ms ?? '',
         log.duration_ms,
         log.request_id || '',