feat: add quota limit for API key accounts

- Add configurable spending limit (quota_limit) for apikey-type accounts
- Atomic quota accumulation via PostgreSQL JSONB operations on TotalCost
- Scheduler filters out over-quota accounts with outbox-triggered snapshot refresh
- Display quota usage ($used / $limit) in account capacity column
- Add "Reset Quota" action in account menu to reset usage to zero
- Editing account settings preserves quota_used (no accidental reset)
- Covers all 3 billing paths: Anthropic, Gemini, OpenAI RecordUsage

chore: bump version to 0.1.90.4

frontend/src/i18n/locales/en.ts

@@ -1734,6 +1734,10 @@ export default {
           stickyExemptWarning: 'RPM limit (Sticky Exempt) - Approaching limit',
           stickyExemptOver: 'RPM limit (Sticky Exempt) - Over limit, sticky only'
         },
+        quota: {
+          exceeded: 'Quota exceeded, account paused',
+          normal: 'Quota normal'
+        },
       },
       tempUnschedulable: {
         title: 'Temp Unschedulable',
@@ -1779,6 +1783,10 @@ export default {
         }
       },
       clearRateLimit: 'Clear Rate Limit',
+      resetQuota: 'Reset Quota',
+      quotaLimit: 'Quota Limit',
+      quotaLimitPlaceholder: '0 means unlimited',
+      quotaLimitHint: 'Set max spending limit (USD). Account will be paused when reached. Changing limit won\'t reset usage.',
       testConnection: 'Test Connection',
       reAuthorize: 'Re-Authorize',
       refreshToken: 'Refresh Token',

frontend/src/i18n/locales/zh.ts

@@ -1784,8 +1784,16 @@ export default {
           stickyExemptWarning: 'RPM 限制 (粘性豁免) - 接近阈值',
           stickyExemptOver: 'RPM 限制 (粘性豁免) - 超限，仅粘性会话'
         },
+        quota: {
+          exceeded: '配额已用完，账号暂停调度',
+          normal: '配额正常'
+        },
       },
       clearRateLimit: '清除速率限制',
+      resetQuota: '重置配额',
+      quotaLimit: '配额限制',
+      quotaLimitPlaceholder: '0 表示不限制',
+      quotaLimitHint: '设置最大使用额度（美元），达到后账号暂停调度。修改限额不会重置已用额度。',
       testConnection: '测试连接',
       reAuthorize: '重新授权',
       refreshToken: '刷新令牌',

frontend/src/types/index.ts

@@ -705,6 +705,10 @@ export interface Account {
   cache_ttl_override_enabled?: boolean | null
   cache_ttl_override_target?: string | null
 
+  // API Key 账号配额限制
+  quota_limit?: number | null
+  quota_used?: number | null
+
   // 运行时状态（仅当启用对应限制时返回）
   current_window_cost?: number | null // 当前窗口费用
   active_sessions?: number | null // 当前活跃会话数

frontend/src/views/admin/AccountsView.vue

@@ -261,7 +261,7 @@
     <AccountTestModal :show="showTest" :account="testingAcc" @close="closeTestModal" />
     <AccountStatsModal :show="showStats" :account="statsAcc" @close="closeStatsModal" />
     <ScheduledTestsPanel :show="showSchedulePanel" :account-id="scheduleAcc?.id ?? null" :model-options="scheduleModelOptions" @close="closeSchedulePanel" />
-    <AccountActionMenu :show="menu.show" :account="menu.acc" :position="menu.pos" @close="menu.show = false" @test="handleTest" @stats="handleViewStats" @schedule="handleSchedule" @reauth="handleReAuth" @refresh-token="handleRefresh" @reset-status="handleResetStatus" @clear-rate-limit="handleClearRateLimit" />
+    <AccountActionMenu :show="menu.show" :account="menu.acc" :position="menu.pos" @close="menu.show = false" @test="handleTest" @stats="handleViewStats" @schedule="handleSchedule" @reauth="handleReAuth" @refresh-token="handleRefresh" @reset-status="handleResetStatus" @clear-rate-limit="handleClearRateLimit" @reset-quota="handleResetQuota" />
     <SyncFromCrsModal :show="showSync" @close="showSync = false" @synced="reload" />
     <ImportDataModal :show="showImportData" @close="showImportData = false" @imported="handleDataImported" />
     <BulkEditAccountModal :show="showBulkEdit" :account-ids="selIds" :selected-platforms="selPlatforms" :selected-types="selTypes" :proxies="proxies" :groups="groups" @close="showBulkEdit = false" @updated="handleBulkUpdated" />
@@ -1125,6 +1125,16 @@ const handleClearRateLimit = async (a: Account) => {
     console.error('Failed to clear rate limit:', error)
   }
 }
+const handleResetQuota = async (a: Account) => {
+  try {
+    const updated = await adminAPI.accounts.resetAccountQuota(a.id)
+    patchAccountInList(updated)
+    enterAutoRefreshSilentWindow()
+    appStore.showSuccess(t('common.success'))
+  } catch (error) {
+    console.error('Failed to reset quota:', error)
+  }
+}
 const handleDelete = (a: Account) => { deletingAcc.value = a; showDeleteDialog.value = true }
 const confirmDelete = async () => { if(!deletingAcc.value) return; try { await adminAPI.accounts.delete(deletingAcc.value.id); showDeleteDialog.value = false; deletingAcc.value = null; reload() } catch (error) { console.error('Failed to delete account:', error) } }
 const handleToggleSchedulable = async (a: Account) => {