fix: 旧订单允许退款 + 移除自动退款 + 改为默认扣除余额/订阅开关

- providerInstanceId 为 null 的旧订单默认允许退款申请
- 移除 AUTO_REFUND_ENABLED 自动退款功能
- 改为 DEFAULT_DEDUCT_BALANCE：控制退款对话框默认勾选状态

src/__tests__/app/api/orders-my-route.test.ts

@@ -164,7 +164,7 @@ describe('GET /api/orders/my - canRefundRequest', () => {
     expect(data.orders[0].canRefundRequest).toBe(false);
   });
 
-  it('canRefundRequest = false when providerInstanceId is null', async () => {
+  it('canRefundRequest = true when providerInstanceId is null (legacy orders)', async () => {
     mockOrderFindMany.mockResolvedValue([
       {
         id: 'order-005',
@@ -184,7 +184,7 @@ describe('GET /api/orders/my - canRefundRequest', () => {
     const res = await GET(createRequest());
     const data = await res.json();
 
-    expect(data.orders[0].canRefundRequest).toBe(false);
+    expect(data.orders[0].canRefundRequest).toBe(true);
   });
 
   it('canRefundRequest = false when instance not found in DB', async () => {

src/app/admin/orders/page.tsx

@@ -162,6 +162,7 @@ function AdminContent() {
   const [refundUserBalance, setRefundUserBalance] = useState<number | undefined>(undefined);
   const [refundSubRemainingDays, setRefundSubRemainingDays] = useState<number | undefined>(undefined);
   const [refundWarning, setRefundWarning] = useState<string | undefined>(undefined);
+  const [defaultDeductBalance, setDefaultDeductBalance] = useState(true);
   const [refundRequireForce, setRefundRequireForce] = useState(false);
 
   const fetchOrders = useCallback(async () => {
@@ -196,6 +197,17 @@ function AdminContent() {
     fetchOrders();
   }, [fetchOrders]);
 
+  useEffect(() => {
+    if (!token) return;
+    fetch(`/api/admin/config?token=${token}`)
+      .then((r) => (r.ok ? r.json() : null))
+      .then((data) => {
+        const val = data?.configs?.find((c: { key: string }) => c.key === 'DEFAULT_DEDUCT_BALANCE');
+        if (val) setDefaultDeductBalance(val.value === 'true');
+      })
+      .catch(() => {});
+  }, [token]);
+
   if (!token) {
     return (
       <div className={`flex min-h-screen items-center justify-center p-4 ${isDark ? 'bg-slate-950' : 'bg-slate-50'}`}>
@@ -482,6 +494,7 @@ function AdminContent() {
           userBalance={refundUserBalance}
           subscriptionDays={refundOrder.subscriptionDays ?? undefined}
           subscriptionRemainingDays={refundSubRemainingDays}
+          defaultDeductBalance={defaultDeductBalance}
           warning={refundWarning}
           requireForce={refundRequireForce}
           onConfirm={handleConfirmRefund}

src/app/admin/payment-config/page.tsx

@@ -69,8 +69,8 @@ function getTexts(locale: Locale) {
         allChannels: 'All Channels',
         sub2apiAdminApiKey: 'Sub2API Admin API Key',
         sub2apiAdminApiKeyHint: 'Leave empty to use environment variable',
-        autoRefund: 'Auto Refund',
-        autoRefundHint: 'When enabled, user refund requests are executed immediately without admin approval',
+        defaultDeductBalance: 'Default Deduct Balance',
+        defaultDeductBalanceHint: 'When enabled, refund approval defaults to deducting balance/subscription',
       }
     : {
         missingToken: '缺少管理员凭证',
@@ -132,8 +132,8 @@ function getTexts(locale: Locale) {
         allChannels: '全部渠道',
         sub2apiAdminApiKey: 'Sub2API Admin API Key',
         sub2apiAdminApiKeyHint: '留空则使用环境变量',
-        autoRefund: '自动退款',
-        autoRefundHint: '开启后，用户提交退款申请会立即执行退款，无需管理员审核',
+        defaultDeductBalance: '默认扣除余额/订阅',
+        defaultDeductBalanceHint: '开启后，退款通过时默认扣除余额/订阅；关闭时默认不扣除',
       };
 }
 
@@ -259,7 +259,7 @@ function PaymentConfigContent() {
   const [rcSaving, setRcSaving] = useState(false);
   const [rcLoadBalanceStrategy, setRcLoadBalanceStrategy] = useState('round-robin');
   const [rcSub2apiKey, setRcSub2apiKey] = useState('');
-  const [rcAutoRefundEnabled, setRcAutoRefundEnabled] = useState(false);
+  const [rcAutoRefundEnabled, setRcAutoRefundEnabled] = useState(true);
 
   // Override env
   const [rcOverrideEnv, setRcOverrideEnv] = useState(false);
@@ -327,7 +327,7 @@ function PaymentConfigContent() {
         if (c.key === 'ORDER_TIMEOUT_MINUTES') setRcOrderTimeout(c.value);
         if (c.key === 'LOAD_BALANCE_STRATEGY') setRcLoadBalanceStrategy(c.value || 'round-robin');
         if (c.key === 'SUB2API_ADMIN_API_KEY') setRcSub2apiKey(/\*{4,}/.test(c.value) ? '' : c.value);
-        if (c.key === 'AUTO_REFUND_ENABLED') setRcAutoRefundEnabled(c.value === 'true');
+        if (c.key === 'DEFAULT_DEDUCT_BALANCE') setRcAutoRefundEnabled(c.value === 'true');
       }
       setRcOverrideEnv(hasOverride);
       setRcOverrideSaved(hasOverride);
@@ -577,7 +577,7 @@ function PaymentConfigContent() {
               label: '余额充值禁用',
             },
             {
-              key: 'AUTO_REFUND_ENABLED',
+              key: 'DEFAULT_DEDUCT_BALANCE',
               value: rcAutoRefundEnabled ? 'true' : 'false',
               group: 'payment',
               label: '自动退款开关',
@@ -775,9 +775,11 @@ function PaymentConfigContent() {
           </div>
           <div className="flex items-center gap-2">
             <Toggle value={rcAutoRefundEnabled} onChange={() => setRcAutoRefundEnabled(!rcAutoRefundEnabled)} />
-            <span className={`text-sm ${isDark ? 'text-slate-300' : 'text-slate-700'}`}>{t.autoRefund}</span>
+            <span className={`text-sm ${isDark ? 'text-slate-300' : 'text-slate-700'}`}>{t.defaultDeductBalance}</span>
           </div>
-          <span className={`text-xs ${isDark ? 'text-slate-400' : 'text-slate-500'}`}>{t.autoRefundHint}</span>
+          <span className={`text-xs ${isDark ? 'text-slate-400' : 'text-slate-500'}`}>
+            {t.defaultDeductBalanceHint}
+          </span>
         </div>
 
         {/* Cancel rate limit */}

src/app/api/admin/config/route.ts

@@ -94,7 +94,7 @@ const ALLOWED_CONFIG_KEYS = new Set([
   'ENABLED_PROVIDERS',
   'SUB2API_ADMIN_API_KEY',
   'OVERRIDE_ENV_ENABLED',
-  'AUTO_REFUND_ENABLED',
+  'DEFAULT_DEDUCT_BALANCE',
 ]);
 
 export async function PUT(request: NextRequest) {

src/app/api/orders/my/route.ts

@@ -79,7 +79,7 @@ export async function GET(request: NextRequest) {
         const derived = deriveOrderState(item);
         const instanceRefundEnabled = item.providerInstanceId
           ? (refundEnabledMap.get(item.providerInstanceId) ?? false)
-          : false;
+          : true;
         return {
           id: item.id,
           amount: Number(item.amount),

src/components/admin/RefundDialog.tsx

@@ -11,6 +11,7 @@ interface RefundDialogProps {
   subscriptionDays?: number;
   subscriptionRemainingDays?: number;
   requestedAmount?: number | null;
+  defaultDeductBalance?: boolean;
   onConfirm: (reason: string, force: boolean, deductBalance: boolean, amount?: number) => Promise<void>;
   onCancel: () => void;
   warning?: string;
@@ -27,6 +28,7 @@ export default function RefundDialog({
   subscriptionDays,
   subscriptionRemainingDays,
   requestedAmount,
+  defaultDeductBalance = true,
   onConfirm,
   onCancel,
   warning,
@@ -37,7 +39,7 @@ export default function RefundDialog({
   const [reason, setReason] = useState('');
   const [refundAmount, setRefundAmount] = useState((requestedAmount ?? amount).toFixed(2));
   const [force, setForce] = useState(false);
-  const [deductBalance, setDeductBalance] = useState(true);
+  const [deductBalance, setDeductBalance] = useState(defaultDeductBalance);
   const [loading, setLoading] = useState(false);
 
   const currency = '¥';

src/lib/order/service.ts

@@ -1173,7 +1173,6 @@ export async function requestRefund(input: RefundRequestInput): Promise<{ succes
     );
   }
 
-  const autoRefundEnabled = (await getSystemConfig('AUTO_REFUND_ENABLED')) === 'true';
   const normalizedReason = input.reason?.trim() || null;
 
   const updated = await prisma.order.updateMany({
@@ -1203,21 +1202,11 @@ export async function requestRefund(input: RefundRequestInput): Promise<{ succes
         amount: refundAmount,
         reason: normalizedReason,
         requestedBy: input.userId,
-        autoRefundEnabled,
       }),
       operator: `user:${input.userId}`,
     },
   });
 
-  if (autoRefundEnabled) {
-    return processRefund({
-      orderId: input.orderId,
-      amount: refundAmount,
-      reason: normalizedReason || undefined,
-      locale,
-    });
-  }
-
   return { success: true };
 }