fix: merge general improvements from release branch

Backend:
- gateway_handler: pass subject.UserID instead of int64(0) for user-level routing
- setting_handler: add missing BalanceLowNotifyRechargeURL to UpdateSettings response
- openai_gateway_service: use applyAccountStatsCost for account stats pricing integration
- embed_on: add local file override (data/public/) for embedded frontend assets

Frontend:
- useTableSelection: add batchUpdate method for batch operations
- AccountsView: virtual scrolling params, Set-based isSelected, swipe virtualization
- ProxiesView: add batchUpdate to selection and swipe-select
- BulkEditAccountModal: fix submit handler to prevent event object as argument
- SettingsView: move payload construction outside try block
- i18n: add general translation keys (saved, deleted, view, validation, allowUserRefund)
- api/client: reorder error fields for consistency
- stores/payment: clarify pollOrderStatus JSDoc

frontend/src/api/client.ts

@@ -270,9 +270,9 @@ apiClient.interceptors.response.use(
       return Promise.reject({
         status,
         code: apiData.code,
+        reason: apiData.reason,
         error: apiData.error,
         message: apiData.message || apiData.detail || error.message,
-        reason: apiData.reason,
         metadata: apiData.metadata,
       })
     }

frontend/src/components/account/BulkEditAccountModal.vue

@@ -5,7 +5,7 @@
     width="wide"
     @close="handleClose"
   >
-    <form id="bulk-edit-account-form" class="space-y-5" @submit.prevent="handleSubmit">
+    <form id="bulk-edit-account-form" class="space-y-5" @submit.prevent="() => handleSubmit()">
       <!-- Info -->
       <div class="rounded-lg bg-blue-50 p-4 dark:bg-blue-900/20">
         <p class="text-sm text-blue-700 dark:text-blue-400">

frontend/src/composables/useTableSelection.ts

@@ -76,6 +76,12 @@ export function useTableSelection<T>({ rows, getId }: UseTableSelectionOptions<T
     replaceSelectedSet(next)
   }
 
+  const batchUpdate = (updater: (draft: Set<number>) => void) => {
+    const draft = new Set(selectedSet.value)
+    updater(draft)
+    replaceSelectedSet(draft)
+  }
+
   const selectVisible = () => {
     toggleVisible(true)
   }
@@ -93,6 +99,7 @@ export function useTableSelection<T>({ rows, getId }: UseTableSelectionOptions<T
     clear,
     removeMany,
     toggleVisible,
-    selectVisible
+    selectVisible,
+    batchUpdate
   }
 }

frontend/src/i18n/locales/en.ts

@@ -247,6 +247,8 @@ export default {
     loading: 'Loading...',
     justNow: 'just now',
     save: 'Save',
+    saved: 'Saved successfully',
+    deleted: 'Deleted successfully',
     cancel: 'Cancel',
     delete: 'Delete',
     edit: 'Edit',
@@ -304,6 +306,7 @@ export default {
     saving: 'Saving...',
     selectedCount: '({count} selected)',
     refresh: 'Refresh',
+    view: 'View',
     settings: 'Settings',
     chooseFile: 'Choose File',
     notAvailable: 'N/A',
@@ -5487,6 +5490,7 @@ export default {
       refundSuccess: 'Refund successful',
       refundInfo: 'Refund Info',
       refundEnabled: 'Refund Enabled',
+      allowUserRefund: 'Allow User Refund',
       alreadyRefunded: 'Already Refunded',
       deductBalance: 'Deduct Balance',
       deductBalanceHint: 'Subtract recharged amount from user balance',
@@ -5556,6 +5560,9 @@ export default {
       tabPlanConfig: 'Plan Configuration',
       tabUserSubs: 'User Subscriptions',
       selectGroup: 'Select a group',
+      groupRequired: 'Please select a subscription group',
+      priceRequired: 'Price must be greater than 0',
+      validityDaysRequired: 'Validity days must be greater than 0',
       groupMissing: 'Missing',
       groupInfo: 'Group Info',
       platform: 'Platform',

frontend/src/i18n/locales/zh.ts

@@ -247,6 +247,8 @@ export default {
     loading: '加载中...',
     justNow: '刚刚',
     save: '保存',
+    saved: '保存成功',
+    deleted: '删除成功',
     cancel: '取消',
     delete: '删除',
     edit: '编辑',
@@ -304,6 +306,7 @@ export default {
     saving: '保存中...',
     selectedCount: '（已选 {count} 个）',
     refresh: '刷新',
+    view: '查看',
     settings: '设置',
     chooseFile: '选择文件',
     notAvailable: '不可用',
@@ -5744,6 +5747,9 @@ export default {
       tabPlanConfig: '套餐配置',
       tabUserSubs: '用户订阅',
       selectGroup: '请选择分组',
+      groupRequired: '请选择订阅分组',
+      priceRequired: '价格必须大于 0',
+      validityDaysRequired: '有效期天数必须大于 0',
       groupMissing: '缺失',
       groupInfo: '分组信息',
       platform: '平台',

frontend/src/stores/payment.ts

@@ -66,7 +66,7 @@ export const usePaymentStore = defineStore('payment', () => {
     return response.data
   }
 
-  /** Poll order status by ID */
+  /** Poll order status by ID (read-only, no upstream check) */
   async function pollOrderStatus(orderId: number): Promise<PaymentOrder | null> {
     try {
       const response = await paymentAPI.getOrder(orderId)

frontend/src/views/admin/AccountsView.vue

@@ -144,6 +144,7 @@
         <AccountBulkActionsBar :selected-ids="selIds" @delete="handleBulkDelete" @reset-status="handleBulkResetStatus" @refresh-token="handleBulkRefreshToken" @edit="showBulkEdit = true" @clear="clearSelection" @select-page="selectPage" @toggle-schedulable="handleBulkToggleSchedulable" />
         <div ref="accountTableRef" class="flex min-h-0 flex-1 flex-col overflow-hidden">
         <DataTable
+          ref="dataTableRef"
           :columns="cols"
           :data="accounts"
           :loading="loading"
@@ -153,6 +154,8 @@
           default-sort-key="name"
           default-sort-order="asc"
           :sort-storage-key="ACCOUNT_SORT_STORAGE_KEY"
+          :estimate-row-height="72"
+          :overscan="5"
         >
           <template #header-select>
             <input
@@ -164,7 +167,7 @@
             />
           </template>
           <template #cell-select="{ row }">
-            <input type="checkbox" :checked="selIds.includes(row.id)" @change="toggleSel(row.id)" class="rounded border-gray-300 text-primary-600 focus:ring-primary-500" />
+            <input type="checkbox" :checked="isSelected(row.id)" @change="toggleSel(row.id)" class="rounded border-gray-300 text-primary-600 focus:ring-primary-500" />
           </template>
           <template #cell-name="{ row, value }">
             <div class="flex flex-col">
@@ -197,7 +200,9 @@
             <AccountCapacityCell :account="row" />
           </template>
           <template #cell-status="{ row }">
-            <AccountStatusIndicator :account="row" @show-temp-unsched="handleShowTempUnsched" />
+            <div class="flex items-center gap-1.5">
+              <AccountStatusIndicator :account="row" @show-temp-unsched="handleShowTempUnsched" />
+            </div>
           </template>
           <template #cell-schedulable="{ row }">
             <button @click="handleToggleSchedulable(row)" :disabled="togglingSchedulable === row.id" class="relative inline-flex h-5 w-9 flex-shrink-0 cursor-pointer rounded-full border-2 border-transparent transition-colors duration-200 ease-in-out focus:outline-none focus:ring-2 focus:ring-primary-500 focus:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-50 dark:focus:ring-offset-dark-800" :class="[row.schedulable ? 'bg-primary-500 hover:bg-primary-600' : 'bg-gray-200 hover:bg-gray-300 dark:bg-dark-600 dark:hover:bg-dark-500']" :title="row.schedulable ? t('admin.accounts.schedulableEnabled') : t('admin.accounts.schedulableDisabled')">
@@ -313,7 +318,7 @@ import { useAppStore } from '@/stores/app'
 import { useAuthStore } from '@/stores/auth'
 import { adminAPI } from '@/api/admin'
 import { useTableLoader } from '@/composables/useTableLoader'
-import { useSwipeSelect } from '@/composables/useSwipeSelect'
+import { useSwipeSelect, type SwipeSelectVirtualContext } from '@/composables/useSwipeSelect'
 import { useTableSelection } from '@/composables/useTableSelection'
 import AppLayout from '@/components/layout/AppLayout.vue'
 import TablePageLayout from '@/components/layout/TablePageLayout.vue'
@@ -351,6 +356,7 @@ const authStore = useAuthStore()
 const proxies = ref<AccountProxy[]>([])
 const groups = ref<AdminGroup[]>([])
 const accountTableRef = ref<HTMLElement | null>(null)
+const dataTableRef = ref<InstanceType<typeof DataTable> | null>(null)
 const selPlatforms = computed<AccountPlatform[]>(() => {
   const platforms = new Set(
     accounts.value
@@ -650,17 +656,25 @@ const {
   clear: clearSelection,
   removeMany: removeSelectedAccounts,
   toggleVisible,
-  selectVisible: selectPage
+  selectVisible: selectPage,
+  batchUpdate
 } = useTableSelection<Account>({
   rows: accounts,
   getId: (account) => account.id
 })
 
+const swipeVirtualContext: SwipeSelectVirtualContext = {
+  getVirtualizer: () => dataTableRef.value?.virtualizer ?? null,
+  getSortedData: () => dataTableRef.value?.sortedData ?? accounts.value,
+  getRowId: (row: any) => row.id,
+}
+
 useSwipeSelect(accountTableRef, {
   isSelected,
   select,
-  deselect
-})
+  deselect,
+  batchUpdate
+}, swipeVirtualContext)
 
 const resetAutoRefreshCache = () => {
   autoRefreshETag.value = null

frontend/src/views/admin/ProxiesView.vue

@@ -985,7 +985,8 @@ const {
   deselect,
   clear: clearSelectedProxies,
   removeMany: removeSelectedProxies,
-  toggleVisible
+  toggleVisible,
+  batchUpdate
 } = useTableSelection<Proxy>({
   rows: proxies,
   getId: (proxy) => proxy.id
@@ -993,7 +994,8 @@ const {
 useSwipeSelect(proxyTableRef, {
   isSelected,
   select,
-  deselect
+  deselect,
+  batchUpdate
 })
 const accountsProxy = ref<Proxy | null>(null)
 const proxyAccounts = ref<ProxyAccountSummary[]>([])

frontend/src/views/admin/SettingsView.vue

@@ -4116,12 +4116,13 @@ async function handleToggleField(provider: ProviderInstance, field: 'enabled' |
   if (field === 'enabled') newValue = !provider.enabled
   else if (field === 'refund_enabled') newValue = !provider.refund_enabled
   else newValue = !provider.allow_user_refund
+
+  const payload: Record<string, boolean> = { [field]: newValue }
+  // Cascade: turning off refund_enabled also turns off allow_user_refund
+  if (field === 'refund_enabled' && !newValue) {
+    payload.allow_user_refund = false
+  }
   try {
-    const payload: Record<string, boolean> = { [field]: newValue }
-    // Cascade: turning off refund_enabled also disables allow_user_refund
-    if (field === 'refund_enabled' && !newValue) {
-      payload.allow_user_refund = false
-    }
     await adminAPI.payment.updateProvider(provider.id, payload)
     if (field === 'enabled') provider.enabled = newValue
     else if (field === 'refund_enabled') {