feat: resolve payment results by resume token

frontend/src/views/user/PaymentResultView.vue

@@ -150,7 +150,17 @@ onMounted(async () => {
     }
   }
 
-  if (orderId) {
+  if (!order.value && !orderId && resumeToken) {
+    try {
+      const result = await paymentAPI.resolveOrderPublicByResumeToken(resumeToken)
+      order.value = result.data
+      orderId = result.data.id
+    } catch (_err: unknown) {
+      // Resume token recovery failed, continue to legacy fallback paths.
+    }
+  }
+
+  if (!order.value && orderId) {
     try {
       order.value = await paymentStore.pollOrderStatus(orderId)
     } catch (_err: unknown) {

frontend/src/views/user/__tests__/PaymentResultView.spec.ts

@@ -9,6 +9,7 @@ const routerPush = vi.hoisted(() => vi.fn())
 const pollOrderStatus = vi.hoisted(() => vi.fn())
 const verifyOrderPublic = vi.hoisted(() => vi.fn())
 const verifyOrder = vi.hoisted(() => vi.fn())
+const resolveOrderPublicByResumeToken = vi.hoisted(() => vi.fn())
 
 vi.mock('vue-router', async () => {
   const actual = await vi.importActual<typeof import('vue-router')>('vue-router')
@@ -39,6 +40,7 @@ vi.mock('@/api/payment', () => ({
   paymentAPI: {
     verifyOrderPublic,
     verifyOrder,
+    resolveOrderPublicByResumeToken,
   },
 }))
 
@@ -67,6 +69,7 @@ describe('PaymentResultView', () => {
     pollOrderStatus.mockReset()
     verifyOrderPublic.mockReset()
     verifyOrder.mockReset()
+    resolveOrderPublicByResumeToken.mockReset()
     window.localStorage.clear()
   })
 
@@ -129,4 +132,27 @@ describe('PaymentResultView', () => {
     expect(verifyOrderPublic).toHaveBeenCalledWith('legacy-123')
     expect(wrapper.text()).toContain('payment.result.success')
   })
+
+  it('resolves order by resume token when local recovery snapshot is missing', async () => {
+    routeState.query = {
+      resume_token: 'resume-77',
+    }
+    resolveOrderPublicByResumeToken.mockResolvedValue({
+      data: orderFactory('PAID'),
+    })
+
+    const wrapper = mount(PaymentResultView, {
+      global: {
+        stubs: {
+          OrderStatusBadge: true,
+        },
+      },
+    })
+
+    await flushPromises()
+
+    expect(resolveOrderPublicByResumeToken).toHaveBeenCalledWith('resume-77')
+    expect(wrapper.text()).toContain('payment.result.success')
+    expect(verifyOrderPublic).not.toHaveBeenCalled()
+  })
 })