feat(payment): add complete payment system with multi-provider support

Add a full payment and subscription system supporting EasyPay (Alipay/WeChat),
Stripe, and direct Alipay/WeChat Pay providers with multi-instance load balancing.

frontend/src/views/user/PaymentResultView.vue

+<template>
+  <div class="flex min-h-screen items-center justify-center bg-gray-50 px-4 dark:bg-dark-900">
+    <div class="w-full max-w-md space-y-6">
+      <!-- Loading -->
+      <div v-if="loading" class="flex items-center justify-center py-20">
+        <div class="h-8 w-8 animate-spin rounded-full border-4 border-primary-500 border-t-transparent"></div>
+      </div>
+      <template v-else>
+        <!-- Status Icon -->
+        <div class="text-center">
+          <div v-if="isSuccess"
+            class="mx-auto flex h-20 w-20 items-center justify-center rounded-full bg-green-100 dark:bg-green-900/30">
+            <svg class="h-10 w-10 text-green-500" fill="none" viewBox="0 0 24 24" stroke="currentColor"
+              stroke-width="2">
+              <path stroke-linecap="round" stroke-linejoin="round" d="M5 13l4 4L19 7" />
+            </svg>
+          </div>
+          <div v-else
+            class="mx-auto flex h-20 w-20 items-center justify-center rounded-full bg-red-100 dark:bg-red-900/30">
+            <svg class="h-10 w-10 text-red-500" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="2">
+              <path stroke-linecap="round" stroke-linejoin="round" d="M6 18L18 6M6 6l12 12" />
+            </svg>
+          </div>
+          <h2 class="mt-4 text-2xl font-bold text-gray-900 dark:text-white">
+            {{ isSuccess ? t('payment.result.success') : t('payment.result.failed') }}
+          </h2>
+        </div>
+        <!-- Order Info -->
+        <div v-if="order" class="rounded-xl bg-white p-5 shadow-sm dark:bg-dark-800">
+          <div class="space-y-3 text-sm">
+            <div class="flex justify-between">
+              <span class="text-gray-500 dark:text-gray-400">{{ t('payment.orders.orderId') }}</span>
+              <span class="font-medium text-gray-900 dark:text-white">#{{ order.id }}</span>
+            </div>
+            <div v-if="order.out_trade_no" class="flex justify-between">
+              <span class="text-gray-500 dark:text-gray-400">{{ t('payment.orders.orderNo') }}</span>
+              <span class="font-medium text-gray-900 dark:text-white">{{ order.out_trade_no }}</span>
+            </div>
+            <div class="flex justify-between">
+              <span class="text-gray-500 dark:text-gray-400">{{ t('payment.orders.amount') }}</span>
+              <span class="font-medium text-gray-900 dark:text-white">&#165;{{ order.pay_amount.toFixed(2) }}</span>
+            </div>
+            <div class="flex justify-between">
+              <span class="text-gray-500 dark:text-gray-400">{{ t('payment.orders.paymentMethod') }}</span>
+              <span class="font-medium text-gray-900 dark:text-white">{{ t('payment.methods.' + order.payment_type, order.payment_type) }}</span>
+            </div>
+            <div class="flex justify-between">
+              <span class="text-gray-500 dark:text-gray-400">{{ t('payment.orders.status') }}</span>
+              <OrderStatusBadge :status="order.status" />
+            </div>
+          </div>
+        </div>
+        <!-- EasyPay return info (when no order loaded) -->
+        <div v-else-if="returnInfo" class="rounded-xl bg-white p-5 shadow-sm dark:bg-dark-800">
+          <div class="space-y-3 text-sm">
+            <div v-if="returnInfo.outTradeNo" class="flex justify-between">
+              <span class="text-gray-500 dark:text-gray-400">{{ t('payment.orders.orderId') }}</span>
+              <span class="font-medium text-gray-900 dark:text-white">{{ returnInfo.outTradeNo }}</span>
+            </div>
+            <div v-if="returnInfo.money" class="flex justify-between">
+              <span class="text-gray-500 dark:text-gray-400">{{ t('payment.orders.amount') }}</span>
+              <span class="font-medium text-gray-900 dark:text-white">&#165;{{ returnInfo.money }}</span>
+            </div>
+            <div v-if="returnInfo.type" class="flex justify-between">
+              <span class="text-gray-500 dark:text-gray-400">{{ t('payment.orders.paymentMethod') }}</span>
+              <span class="font-medium text-gray-900 dark:text-white">{{ t('payment.methods.' + returnInfo.type, returnInfo.type) }}</span>
+            </div>
+          </div>
+        </div>
+        <!-- Actions -->
+        <div class="flex gap-3">
+          <button class="btn btn-secondary flex-1" @click="router.push('/purchase')">{{ t('payment.result.backToRecharge') }}</button>
+          <button class="btn btn-primary flex-1" @click="router.push('/orders')">{{ t('payment.result.viewOrders') }}</button>
+        </div>
+      </template>
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { ref, computed, onMounted } from 'vue'
+import { useI18n } from 'vue-i18n'
+import { useRoute, useRouter } from 'vue-router'
+import OrderStatusBadge from '@/components/payment/OrderStatusBadge.vue'
+import { usePaymentStore } from '@/stores/payment'
+import { paymentAPI } from '@/api/payment'
+import type { PaymentOrder } from '@/types/payment'
+
+const { t } = useI18n()
+const route = useRoute()
+const router = useRouter()
+const paymentStore = usePaymentStore()
+
+const order = ref<PaymentOrder | null>(null)
+const loading = ref(true)
+
+interface ReturnInfo {
+  outTradeNo: string
+  money: string
+  type: string
+  tradeStatus: string
+}
+const returnInfo = ref<ReturnInfo | null>(null)
+
+const SUCCESS_STATUSES = new Set(['COMPLETED', 'PAID', 'RECHARGING'])
+
+const isSuccess = computed(() => {
+  // Always prioritize actual order status from backend
+  if (order.value) {
+    return SUCCESS_STATUSES.has(order.value.status)
+  }
+  // Fallback only when order not loaded
+  if (route.query.status === 'success') return true
+  if (route.query.trade_status === 'TRADE_SUCCESS') return true
+  return false
+})
+
+/** Extract numeric order ID from out_trade_no like "sub2_46" → 46 */
+function parseOutTradeNo(outTradeNo: string): number {
+  const match = outTradeNo.match(/_(\d+)$/)
+  return match ? Number(match[1]) : 0
+}
+
+onMounted(async () => {
+  // Try order_id first (internal navigation from QRCode/Stripe pages)
+  let orderId = Number(route.query.order_id) || 0
+  const outTradeNo = String(route.query.out_trade_no || '')
+
+  // Fallback: EasyPay return URL with out_trade_no
+  if (!orderId && outTradeNo) {
+    orderId = parseOutTradeNo(outTradeNo)
+    // Store return info for display when order lookup fails
+    returnInfo.value = {
+      outTradeNo,
+      money: String(route.query.money || ''),
+      type: String(route.query.type || ''),
+      tradeStatus: String(route.query.trade_status || ''),
+    }
+  }
+
+  // Verify payment via public endpoint (works without login)
+  if (outTradeNo) {
+    try {
+      const result = await paymentAPI.verifyOrderPublic(outTradeNo)
+      order.value = result.data
+    } catch (_err: unknown) {
+      // Public verify failed, try authenticated endpoint if logged in
+      try {
+        const result = await paymentAPI.verifyOrder(outTradeNo)
+        order.value = result.data
+      } catch (_e: unknown) { /* fall through */ }
+    }
+  }
+
+  // Normal order lookup by ID (if verify didn't load the order)
+  if (!order.value && orderId) {
+    try {
+      order.value = await paymentStore.pollOrderStatus(orderId)
+    } catch (_err: unknown) {
+      // Order lookup failed, will show returnInfo fallback
+    }
+  }
+  loading.value = false
+})
+</script>

frontend/src/views/user/PaymentView.vue

+<template>
+  <AppLayout>
+    <div class="mx-auto max-w-4xl space-y-6">
+      <div v-if="loading" class="flex items-center justify-center py-20">
+        <div class="h-8 w-8 animate-spin rounded-full border-4 border-primary-500 border-t-transparent"></div>
+      </div>
+      <template v-else>
+        <!-- Tab Switcher (hide during payment and subscription confirm) -->
+        <div v-if="tabs.length > 1 && paymentPhase === 'select' && !selectedPlan" class="flex space-x-1 rounded-xl bg-gray-100 p-1 dark:bg-dark-800">
+          <button v-for="tab in tabs" :key="tab.key"
+            class="flex-1 rounded-lg px-4 py-2.5 text-sm font-medium transition-all"
+            :class="activeTab === tab.key ? 'bg-white text-gray-900 shadow dark:bg-dark-700 dark:text-white' : 'text-gray-500 hover:text-gray-700 dark:text-gray-400 dark:hover:text-gray-300'"
+            @click="activeTab = tab.key">{{ tab.label }}</button>
+        </div>
+        <!-- Payment in progress (shared by recharge and subscription) -->
+        <template v-if="paymentPhase === 'paying'">
+          <PaymentStatusPanel
+            :order-id="paymentState.orderId"
+            :qr-code="paymentState.qrCode"
+            :expires-at="paymentState.expiresAt"
+            :payment-type="paymentState.paymentType"
+            :pay-url="paymentState.payUrl"
+            :order-type="paymentState.orderType"
+            @done="onPaymentDone"
+            @success="onPaymentSuccess"
+          />
+        </template>
+        <template v-else-if="paymentPhase === 'stripe'">
+          <StripePaymentInline
+            :order-id="paymentState.orderId"
+            :client-secret="paymentState.clientSecret"
+            :publishable-key="checkout.stripe_publishable_key"
+            :pay-amount="paymentState.payAmount"
+            @success="onPaymentSuccess"
+            @done="onStripeDone"
+            @back="resetPayment"
+            @redirect="onStripeRedirect"
+          />
+        </template>
+        <!-- Tab content (select phase) -->
+        <template v-else>
+          <!-- Top-up Tab -->
+          <template v-if="activeTab === 'recharge'">
+            <!-- Recharge Account Card -->
+            <div class="card p-5">
+              <p class="text-xs font-medium text-gray-400 dark:text-gray-500">{{ t('payment.rechargeAccount') }}</p>
+              <p class="mt-1 text-base font-semibold text-gray-900 dark:text-white">{{ user?.username || '' }}</p>
+              <p class="mt-0.5 text-sm font-medium text-green-600 dark:text-green-400">{{ t('payment.currentBalance') }}: {{ user?.balance?.toFixed(2) || '0.00' }}</p>
+            </div>
+            <div v-if="enabledMethods.length === 0" class="card py-16 text-center">
+              <p class="text-gray-500 dark:text-gray-400">{{ t('payment.notAvailable') }}</p>
+            </div>
+            <template v-else>
+            <div class="card p-6">
+              <AmountInput
+                v-model="amount"
+                :amounts="[10, 20, 50, 100, 200, 500, 1000, 2000, 5000]"
+                :min="globalMinAmount"
+                :max="globalMaxAmount"
+              />
+              <p v-if="amountError" class="mt-2 text-xs text-amber-600 dark:text-amber-300">{{ amountError }}</p>
+            </div>
+            <div v-if="enabledMethods.length >= 1" class="card p-6">
+              <PaymentMethodSelector
+                :methods="methodOptions"
+                :selected="selectedMethod"
+                @select="selectedMethod = $event"
+              />
+            </div>
+            <div v-if="feeRate > 0 && validAmount > 0" class="card p-6">
+              <div class="space-y-2 text-sm">
+                <div class="flex justify-between">
+                  <span class="text-gray-500 dark:text-gray-400">{{ t('payment.amountLabel') }}</span>
+                  <span class="text-gray-900 dark:text-white">${{ validAmount.toFixed(2) }}</span>
+                </div>
+                <div class="flex justify-between">
+                  <span class="text-gray-500 dark:text-gray-400">{{ t('payment.fee') }} ({{ feeRate }}%)</span>
+                  <span class="text-gray-900 dark:text-white">${{ feeAmount.toFixed(2) }}</span>
+                </div>
+                <div class="flex justify-between border-t border-gray-200 pt-2 dark:border-dark-600">
+                  <span class="font-medium text-gray-700 dark:text-gray-300">{{ t('payment.actualPay') }}</span>
+                  <span class="text-lg font-bold text-primary-600 dark:text-primary-400">${{ totalAmount.toFixed(2) }}</span>
+                </div>
+              </div>
+            </div>
+            <button :class="['btn w-full py-3 text-base font-medium', paymentButtonClass]" :disabled="!canSubmit || submitting" @click="handleSubmitRecharge">
+              <span v-if="submitting" class="flex items-center justify-center gap-2">
+                <span class="h-4 w-4 animate-spin rounded-full border-2 border-white border-t-transparent"></span>
+                {{ t('common.processing') }}
+              </span>
+              <span v-else>{{ t('payment.createOrder') }} ${{ (feeRate > 0 && validAmount > 0 ? totalAmount : validAmount).toFixed(2) }}</span>
+            </button>
+            <div v-if="errorMessage" class="rounded-xl border border-red-200 bg-red-50 p-4 dark:border-red-800/50 dark:bg-red-900/20">
+              <p class="text-sm text-red-700 dark:text-red-400">{{ errorMessage }}</p>
+            </div>
+            </template>
+          </template>
+          <!-- Subscribe Tab -->
+          <template v-else-if="activeTab === 'subscription'">
+            <!-- Subscription confirm (inline, replaces plan list) -->
+            <template v-if="selectedPlan">
+              <div class="card p-5">
+                <!-- Header: platform badge + plan name -->
+                <div class="mb-3 flex flex-wrap items-center gap-2">
+                  <span :class="['rounded-md border px-2 py-0.5 text-xs font-medium', planBadgeClass]">
+                    {{ platformLabel(selectedPlan.group_platform || '') }}
+                  </span>
+                  <h3 class="text-lg font-bold text-gray-900 dark:text-white">{{ selectedPlan.name }}</h3>
+                </div>
+                <!-- Price -->
+                <div class="flex items-baseline gap-2">
+                  <span v-if="selectedPlan.original_price" class="text-sm text-gray-400 line-through dark:text-gray-500">
+                    ${{ selectedPlan.original_price }}
+                  </span>
+                  <span :class="['text-3xl font-bold', planTextClass]">${{ selectedPlan.price }}</span>
+                  <span class="text-sm text-gray-500 dark:text-gray-400">/ {{ planValiditySuffix }}</span>
+                </div>
+                <!-- Description -->
+                <p v-if="selectedPlan.description" class="mt-2 text-sm leading-relaxed text-gray-500 dark:text-gray-400">
+                  {{ selectedPlan.description }}
+                </p>
+                <!-- Rate + Limits grid -->
+                <div class="mt-3 grid grid-cols-2 gap-3">
+                  <div>
+                    <span class="text-xs text-gray-400 dark:text-gray-500">{{ t('payment.planCard.rate') }}</span>
+                    <div class="flex items-baseline">
+                      <span :class="['text-lg font-bold', planTextClass]">×{{ selectedPlan.rate_multiplier ?? 1 }}</span>
+                    </div>
+                  </div>
+                  <div v-if="selectedPlan.daily_limit_usd != null">
+                    <span class="text-xs text-gray-400 dark:text-gray-500">{{ t('payment.planCard.dailyLimit') }}</span>
+                    <div class="text-lg font-semibold text-gray-800 dark:text-gray-200">${{ selectedPlan.daily_limit_usd }}</div>
+                  </div>
+                  <div v-if="selectedPlan.weekly_limit_usd != null">
+                    <span class="text-xs text-gray-400 dark:text-gray-500">{{ t('payment.planCard.weeklyLimit') }}</span>
+                    <div class="text-lg font-semibold text-gray-800 dark:text-gray-200">${{ selectedPlan.weekly_limit_usd }}</div>
+                  </div>
+                  <div v-if="selectedPlan.monthly_limit_usd != null">
+                    <span class="text-xs text-gray-400 dark:text-gray-500">{{ t('payment.planCard.monthlyLimit') }}</span>
+                    <div class="text-lg font-semibold text-gray-800 dark:text-gray-200">${{ selectedPlan.monthly_limit_usd }}</div>
+                  </div>
+                  <div v-if="selectedPlan.daily_limit_usd == null && selectedPlan.weekly_limit_usd == null && selectedPlan.monthly_limit_usd == null">
+                    <span class="text-xs text-gray-400 dark:text-gray-500">{{ t('payment.planCard.quota') }}</span>
+                    <div class="text-lg font-semibold text-gray-800 dark:text-gray-200">{{ t('payment.planCard.unlimited') }}</div>
+                  </div>
+                </div>
+              </div>
+              <div v-if="enabledMethods.length >= 1" class="card p-6">
+                <PaymentMethodSelector
+                  :methods="subMethodOptions"
+                  :selected="selectedMethod"
+                  @select="selectedMethod = $event"
+                />
+              </div>
+              <div v-if="feeRate > 0 && selectedPlan.price > 0" class="card p-6">
+                <div class="space-y-2 text-sm">
+                  <div class="flex justify-between">
+                    <span class="text-gray-500 dark:text-gray-400">{{ t('payment.amountLabel') }}</span>
+                    <span class="text-gray-900 dark:text-white">${{ selectedPlan.price.toFixed(2) }}</span>
+                  </div>
+                  <div class="flex justify-between">
+                    <span class="text-gray-500 dark:text-gray-400">{{ t('payment.fee') }} ({{ feeRate }}%)</span>
+                    <span class="text-gray-900 dark:text-white">${{ subFeeAmount.toFixed(2) }}</span>
+                  </div>
+                  <div class="flex justify-between border-t border-gray-200 pt-2 dark:border-dark-600">
+                    <span class="font-medium text-gray-700 dark:text-gray-300">{{ t('payment.actualPay') }}</span>
+                    <span class="text-lg font-bold text-primary-600 dark:text-primary-400">${{ subTotalAmount.toFixed(2) }}</span>
+                  </div>
+                </div>
+              </div>
+              <button :class="['btn w-full py-3 text-base font-medium', paymentButtonClass]" :disabled="!canSubmitSubscription || submitting" @click="confirmSubscribe">
+                <span v-if="submitting" class="flex items-center justify-center gap-2">
+                  <span class="h-4 w-4 animate-spin rounded-full border-2 border-white border-t-transparent"></span>
+                  {{ t('common.processing') }}
+                </span>
+                <span v-else>{{ t('payment.createOrder') }} ${{ (feeRate > 0 ? subTotalAmount : selectedPlan.price).toFixed(2) }}</span>
+              </button>
+              <button class="btn btn-secondary w-full" @click="selectedPlan = null">{{ t('common.cancel') }}</button>
+              <div v-if="errorMessage" class="rounded-xl border border-red-200 bg-red-50 p-4 dark:border-red-800/50 dark:bg-red-900/20">
+                <p class="text-sm text-red-700 dark:text-red-400">{{ errorMessage }}</p>
+              </div>
+            </template>
+            <!-- Plan list -->
+            <template v-else>
+              <div v-if="checkout.plans.length === 0" class="card py-16 text-center">
+                <Icon name="gift" size="xl" class="mx-auto mb-3 text-gray-300 dark:text-dark-600" />
+                <p class="text-gray-500 dark:text-gray-400">{{ t('payment.noPlans') }}</p>
+              </div>
+              <div v-else :class="planGridClass">
+                <SubscriptionPlanCard v-for="plan in checkout.plans" :key="plan.id" :plan="plan" :active-subscriptions="activeSubscriptions" @select="selectPlan" />
+              </div>
+              <!-- Active subscriptions (compact, below plan list) -->
+              <div v-if="activeSubscriptions.length > 0">
+                <p class="mb-2 text-xs font-medium text-gray-400 dark:text-gray-500">{{ t('payment.activeSubscription') }}</p>
+                <div class="space-y-2">
+                  <div v-for="sub in activeSubscriptions" :key="sub.id"
+                    class="flex items-center gap-3 rounded-xl border border-gray-100 bg-white px-3 py-2 dark:border-dark-700 dark:bg-dark-800">
+                    <div :class="['h-6 w-1 shrink-0 rounded-full', platformAccentBarClass(sub.group?.platform || '')]" />
+                    <div class="min-w-0 flex-1">
+                      <div class="flex items-center gap-1.5">
+                        <span class="truncate text-xs font-semibold text-gray-900 dark:text-white">{{ sub.group?.name || `Group #${sub.group_id}` }}</span>
+                        <span :class="['shrink-0 rounded-full px-1.5 py-0.5 text-[9px] font-medium', platformBadgeLightClass(sub.group?.platform || '')]">{{ platformLabel(sub.group?.platform || '') }}</span>
+                      </div>
+                      <div class="flex flex-wrap gap-x-3 text-[11px] text-gray-400 dark:text-gray-500">
+                        <span>{{ t('payment.planCard.rate') }}: ×{{ sub.group?.rate_multiplier ?? 1 }}</span>
+                        <span v-if="sub.group?.daily_limit_usd == null && sub.group?.weekly_limit_usd == null && sub.group?.monthly_limit_usd == null">{{ t('payment.planCard.quota') }}: {{ t('payment.planCard.unlimited') }}</span>
+                        <span v-if="sub.expires_at">{{ t('userSubscriptions.daysRemaining', { days: getDaysRemaining(sub.expires_at) }) }}</span>
+                        <span v-else>{{ t('userSubscriptions.noExpiration') }}</span>
+                      </div>
+                    </div>
+                    <span class="badge badge-success shrink-0 text-[10px]">{{ t('userSubscriptions.status.active') }}</span>
+                  </div>
+                </div>
+              </div>
+            </template>
+          </template>
+        </template>
+        <div v-if="(checkout.help_text || checkout.help_image_url) && paymentPhase === 'select' && !selectedPlan" class="card p-4">
+          <div class="flex flex-col items-center gap-3">
+            <img v-if="checkout.help_image_url" :src="checkout.help_image_url" alt=""
+              class="h-40 max-w-full cursor-pointer rounded-lg object-contain transition-opacity hover:opacity-80"
+              @click="previewImage = checkout.help_image_url" />
+            <p v-if="checkout.help_text" class="text-center text-sm text-gray-500 dark:text-gray-400">{{ checkout.help_text }}</p>
+          </div>
+        </div>
+      </template>
+    </div>
+    <!-- Renewal Plan Selection Modal -->
+    <Teleport to="body">
+      <Transition name="modal">
+        <div v-if="showRenewalModal" class="fixed inset-0 z-50 flex items-center justify-center bg-black/60 backdrop-blur-sm p-4" @click.self="closeRenewalModal">
+          <div class="relative w-full max-w-lg rounded-2xl border border-gray-200 bg-white p-6 shadow-2xl dark:border-dark-700 dark:bg-dark-900">
+            <!-- Close button -->
+            <button class="absolute right-4 top-4 rounded-lg p-1 text-gray-400 transition-colors hover:bg-gray-100 hover:text-gray-600 dark:hover:bg-dark-700 dark:hover:text-gray-200" @click="closeRenewalModal">
+              <svg class="h-5 w-5" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="2"><path stroke-linecap="round" stroke-linejoin="round" d="M6 18L18 6M6 6l12 12" /></svg>
+            </button>
+            <h3 class="mb-4 text-lg font-semibold text-gray-900 dark:text-white">{{ t('payment.selectPlan') }}</h3>
+            <div class="space-y-4">
+              <SubscriptionPlanCard v-for="plan in renewalPlans" :key="plan.id" :plan="plan" :active-subscriptions="activeSubscriptions" @select="selectPlanFromModal" />
+            </div>
+          </div>
+        </div>
+      </Transition>
+    </Teleport>
+    <!-- Image Preview Overlay -->
+    <Teleport to="body">
+      <Transition name="modal">
+        <div v-if="previewImage" class="fixed inset-0 z-[60] flex items-center justify-center bg-black/70 backdrop-blur-sm" @click="previewImage = ''">
+          <img :src="previewImage" alt="" class="max-h-[85vh] max-w-[90vw] rounded-xl object-contain shadow-2xl" />
+        </div>
+      </Transition>
+    </Teleport>
+  </AppLayout>
+</template>
+
+<script setup lang="ts">
+import { ref, computed, onMounted, watch } from 'vue'
+import { useI18n } from 'vue-i18n'
+import { useRoute } from 'vue-router'
+import { useAuthStore } from '@/stores/auth'
+import { usePaymentStore } from '@/stores/payment'
+import { useSubscriptionStore } from '@/stores/subscriptions'
+import { useAppStore } from '@/stores'
+import { paymentAPI } from '@/api/payment'
+import { extractApiErrorMessage } from '@/utils/apiError'
+import type { SubscriptionPlan, CheckoutInfoResponse } from '@/types/payment'
+import AppLayout from '@/components/layout/AppLayout.vue'
+import AmountInput from '@/components/payment/AmountInput.vue'
+import PaymentMethodSelector from '@/components/payment/PaymentMethodSelector.vue'
+import { METHOD_ORDER, POPUP_WINDOW_FEATURES } from '@/components/payment/providerConfig'
+import { platformAccentBarClass, platformBadgeLightClass, platformBadgeClass, platformTextClass, platformLabel } from '@/utils/platformColors'
+import SubscriptionPlanCard from '@/components/payment/SubscriptionPlanCard.vue'
+import PaymentStatusPanel from '@/components/payment/PaymentStatusPanel.vue'
+import StripePaymentInline from '@/components/payment/StripePaymentInline.vue'
+import Icon from '@/components/icons/Icon.vue'
+import type { PaymentMethodOption } from '@/components/payment/PaymentMethodSelector.vue'
+
+const { t } = useI18n()
+const route = useRoute()
+const authStore = useAuthStore()
+const paymentStore = usePaymentStore()
+const subscriptionStore = useSubscriptionStore()
+const appStore = useAppStore()
+
+const user = computed(() => authStore.user)
+const activeSubscriptions = computed(() => subscriptionStore.activeSubscriptions)
+
+function getDaysRemaining(expiresAt: string): number {
+  const diff = new Date(expiresAt).getTime() - Date.now()
+  return Math.max(0, Math.ceil(diff / (1000 * 60 * 60 * 24)))
+}
+
+const loading = ref(true)
+const submitting = ref(false)
+const errorMessage = ref('')
+const activeTab = ref<'recharge' | 'subscription'>('recharge')
+const amount = ref<number | null>(null)
+const selectedMethod = ref('')
+const selectedPlan = ref<SubscriptionPlan | null>(null)
+const previewImage = ref('')
+
+// Payment phase: 'select' → 'paying' (QR/redirect) or 'stripe' (inline Stripe)
+const paymentPhase = ref<'select' | 'paying' | 'stripe'>('select')
+const paymentState = ref({ orderId: 0, qrCode: '', expiresAt: '', paymentType: '', payUrl: '', clientSecret: '', payAmount: 0, orderType: '' })
+
+function resetPayment() {
+  paymentPhase.value = 'select'
+  paymentState.value = { orderId: 0, qrCode: '', expiresAt: '', paymentType: '', payUrl: '', clientSecret: '', payAmount: 0, orderType: '' }
+}
+
+function onPaymentDone() {
+  const wasSubscription = paymentState.value.orderType === 'subscription'
+  resetPayment()
+  selectedPlan.value = null
+  if (wasSubscription) {
+    subscriptionStore.fetchActiveSubscriptions(true).catch(() => {})
+  }
+}
+
+function onPaymentSuccess() {
+  authStore.refreshUser()
+  if (paymentState.value.orderType === 'subscription') {
+    subscriptionStore.fetchActiveSubscriptions(true).catch(() => {})
+  }
+}
+
+function onStripeDone() {
+  const wasSubscription = paymentState.value.orderType === 'subscription'
+  resetPayment()
+  selectedPlan.value = null
+  if (wasSubscription) {
+    subscriptionStore.fetchActiveSubscriptions(true).catch(() => {})
+  }
+}
+
+function onStripeRedirect(orderId: number, payUrl: string) {
+  paymentState.value = { ...paymentState.value, orderId, payUrl, qrCode: '' }
+  paymentPhase.value = 'paying'
+}
+
+// All checkout data from single API call
+const checkout = ref<CheckoutInfoResponse>({
+  methods: {}, global_min: 0, global_max: 0,
+  plans: [], balance_disabled: false, help_text: '', help_image_url: '', stripe_publishable_key: '',
+})
+
+const tabs = computed(() => {
+  const result: { key: 'recharge' | 'subscription'; label: string }[] = []
+  if (!checkout.value.balance_disabled) result.push({ key: 'recharge', label: t('payment.tabTopUp') })
+  result.push({ key: 'subscription', label: t('payment.tabSubscribe') })
+  return result
+})
+
+const enabledMethods = computed(() => Object.keys(checkout.value.methods))
+const validAmount = computed(() => amount.value ?? 0)
+
+// Adaptive grid: center single card, 2-col for 2 plans, 3-col for 3+
+const planGridClass = computed(() => {
+  const n = checkout.value.plans.length
+  if (n <= 2) return 'grid grid-cols-1 gap-5 sm:grid-cols-2'
+  return 'grid grid-cols-1 gap-5 sm:grid-cols-2 lg:grid-cols-3'
+})
+
+// Check if an amount fits a method's [min, max]. 0 = no limit.
+function amountFitsMethod(amt: number, methodType: string): boolean {
+  if (amt <= 0) return true
+  const ml = checkout.value.methods[methodType]
+  if (!ml) return false
+  if (ml.single_min > 0 && amt < ml.single_min) return false
+  if (ml.single_max > 0 && amt > ml.single_max) return false
+  return true
+}
+
+// Global range for AmountInput (union of all methods, precomputed by backend)
+const globalMinAmount = computed(() => checkout.value.global_min)
+const globalMaxAmount = computed(() => checkout.value.global_max)
+
+// Selected method's limits (for validation and error messages)
+const selectedLimit = computed(() => checkout.value.methods[selectedMethod.value])
+
+const methodOptions = computed<PaymentMethodOption[]>(() =>
+  enabledMethods.value.map((type) => {
+    const ml = checkout.value.methods[type]
+    return {
+      type,
+      fee_rate: ml?.fee_rate ?? 0,
+      available: ml?.available !== false && amountFitsMethod(validAmount.value, type),
+    }
+  })
+)
+
+const feeRate = computed(() => selectedLimit.value?.fee_rate ?? 0)
+const feeAmount = computed(() =>
+  feeRate.value > 0 && validAmount.value > 0
+    ? Math.ceil(((validAmount.value * feeRate.value) / 100) * 100) / 100
+    : 0
+)
+const totalAmount = computed(() =>
+  feeRate.value > 0 && validAmount.value > 0
+    ? Math.round((validAmount.value + feeAmount.value) * 100) / 100
+    : validAmount.value
+)
+
+const amountError = computed(() => {
+  if (validAmount.value <= 0) return ''
+  // No method can handle this amount
+  if (!enabledMethods.value.some((m) => amountFitsMethod(validAmount.value, m))) {
+    return t('payment.amountNoMethod')
+  }
+  // Selected method can't handle this amount (but others can)
+  const ml = selectedLimit.value
+  if (ml) {
+    if (ml.single_min > 0 && validAmount.value < ml.single_min) return t('payment.amountTooLow', { min: ml.single_min })
+    if (ml.single_max > 0 && validAmount.value > ml.single_max) return t('payment.amountTooHigh', { max: ml.single_max })
+  }
+  return ''
+})
+
+const canSubmit = computed(() =>
+  validAmount.value > 0
+    && amountFitsMethod(validAmount.value, selectedMethod.value)
+    && selectedLimit.value?.available !== false
+)
+
+// Subscription-specific: method options based on plan price
+const subMethodOptions = computed<PaymentMethodOption[]>(() => {
+  const planPrice = selectedPlan.value?.price ?? 0
+  return enabledMethods.value.map((type) => {
+    const ml = checkout.value.methods[type]
+    return {
+      type,
+      fee_rate: ml?.fee_rate ?? 0,
+      available: ml?.available !== false && amountFitsMethod(planPrice, type),
+    }
+  })
+})
+
+const subFeeAmount = computed(() => {
+  const price = selectedPlan.value?.price ?? 0
+  if (feeRate.value <= 0 || price <= 0) return 0
+  return Math.ceil(((price * feeRate.value) / 100) * 100) / 100
+})
+
+const subTotalAmount = computed(() => {
+  const price = selectedPlan.value?.price ?? 0
+  if (feeRate.value <= 0 || price <= 0) return price
+  return Math.round((price + subFeeAmount.value) * 100) / 100
+})
+
+const canSubmitSubscription = computed(() =>
+  selectedPlan.value !== null
+    && amountFitsMethod(selectedPlan.value.price, selectedMethod.value)
+    && selectedLimit.value?.available !== false
+)
+
+// Auto-switch to first available method when current selection can't handle the amount
+watch(() => [validAmount.value, selectedMethod.value] as const, ([amt, method]) => {
+  if (amt <= 0 || amountFitsMethod(amt, method)) return
+  const available = enabledMethods.value.find((m) => amountFitsMethod(amt, m))
+  if (available) selectedMethod.value = available
+})
+
+// Payment button class: follows selected payment method color
+const paymentButtonClass = computed(() => {
+  const m = selectedMethod.value
+  if (!m) return 'btn-primary'
+  if (m.includes('alipay')) return 'btn-alipay'
+  if (m.includes('wxpay')) return 'btn-wxpay'
+  if (m === 'stripe') return 'btn-stripe'
+  return 'btn-primary'
+})
+
+// Subscription confirm: platform accent colors (clean card, no gradient)
+const planBadgeClass = computed(() => platformBadgeClass(selectedPlan.value?.group_platform || ''))
+const planTextClass = computed(() => platformTextClass(selectedPlan.value?.group_platform || ''))
+
+// Renewal modal state
+const showRenewalModal = ref(false)
+const renewGroupId = ref<number | null>(null)
+const renewalPlans = computed(() => {
+  if (renewGroupId.value == null) return []
+  return checkout.value.plans.filter(p => p.group_id === renewGroupId.value)
+})
+
+const planValiditySuffix = computed(() => {
+  if (!selectedPlan.value) return ''
+  const u = selectedPlan.value.validity_unit || 'day'
+  if (u === 'month') return t('payment.perMonth')
+  if (u === 'year') return t('payment.perYear')
+  return `${selectedPlan.value.validity_days}${t('payment.days')}`
+})
+
+function selectPlan(plan: SubscriptionPlan) {
+  selectedPlan.value = plan
+  errorMessage.value = ''
+}
+
+function selectPlanFromModal(plan: SubscriptionPlan) {
+  showRenewalModal.value = false
+  renewGroupId.value = null
+  selectedPlan.value = plan
+  errorMessage.value = ''
+}
+
+function closeRenewalModal() {
+  showRenewalModal.value = false
+  renewGroupId.value = null
+}
+
+async function handleSubmitRecharge() {
+  if (!canSubmit.value || submitting.value) return
+  await createOrder(validAmount.value, 'balance')
+}
+
+async function confirmSubscribe() {
+  if (!selectedPlan.value || submitting.value) return
+  await createOrder(selectedPlan.value.price, 'subscription', selectedPlan.value.id)
+}
+
+async function createOrder(orderAmount: number, orderType: string, planId?: number) {
+  submitting.value = true
+  errorMessage.value = ''
+  try {
+    const result = await paymentStore.createOrder({
+      amount: orderAmount,
+      payment_type: selectedMethod.value,
+      order_type: orderType,
+      plan_id: planId,
+    })
+    const openWindow = (url: string) => {
+      window.open(url, 'paymentPopup', POPUP_WINDOW_FEATURES)
+    }
+    if (result.client_secret) {
+      // Stripe: show Payment Element inline (user picks method → confirms → redirect if needed)
+      paymentState.value = {
+        orderId: result.order_id, qrCode: '', expiresAt: '',
+        paymentType: selectedMethod.value, payUrl: '',
+        clientSecret: result.client_secret, payAmount: result.pay_amount,
+        orderType,
+      }
+      paymentPhase.value = 'stripe'
+    } else if (result.qr_code) {
+      // QR mode: show QR code inline
+      paymentState.value = {
+        orderId: result.order_id, qrCode: result.qr_code,
+        expiresAt: result.expires_at || '', paymentType: selectedMethod.value, payUrl: '',
+        clientSecret: '', payAmount: 0,
+        orderType,
+      }
+      paymentPhase.value = 'paying'
+    } else if (result.pay_url) {
+      // Redirect/popup mode: open payment URL, show waiting state inline
+      openWindow(result.pay_url)
+      paymentState.value = {
+        orderId: result.order_id, qrCode: '', expiresAt: result.expires_at || '',
+        paymentType: selectedMethod.value, payUrl: result.pay_url,
+        clientSecret: '', payAmount: 0,
+        orderType,
+      }
+      paymentPhase.value = 'paying'
+    } else {
+      errorMessage.value = t('payment.result.failed')
+      appStore.showError(errorMessage.value)
+    }
+  } catch (err: unknown) {
+    const apiErr = err as Record<string, unknown>
+    if (apiErr.reason === 'TOO_MANY_PENDING') {
+      const metadata = apiErr.metadata as Record<string, unknown> | undefined
+      errorMessage.value = t('payment.errors.tooManyPending', { max: metadata?.max || '' })
+    } else if (apiErr.reason === 'CANCEL_RATE_LIMITED') {
+      errorMessage.value = t('payment.errors.cancelRateLimited')
+    } else {
+      errorMessage.value = extractApiErrorMessage(err, t('payment.result.failed'))
+    }
+    appStore.showError(errorMessage.value)
+  } finally {
+    submitting.value = false
+  }
+}
+
+onMounted(async () => {
+  try {
+    const res = await paymentAPI.getCheckoutInfo()
+    checkout.value = res.data
+    if (enabledMethods.value.length) {
+      const order: readonly string[] = METHOD_ORDER
+      const sorted = [...enabledMethods.value].sort((a, b) => {
+        const ai = order.indexOf(a)
+        const bi = order.indexOf(b)
+        return (ai === -1 ? 999 : ai) - (bi === -1 ? 999 : bi)
+      })
+      selectedMethod.value = sorted[0]
+    }
+    if (checkout.value.balance_disabled) {
+      activeTab.value = 'subscription'
+    }
+    // Handle renewal navigation: ?tab=subscription&group=123
+    if (route.query.tab === 'subscription') {
+      activeTab.value = 'subscription'
+      if (route.query.group) {
+        const groupId = Number(route.query.group)
+        const groupPlans = checkout.value.plans.filter(p => p.group_id === groupId)
+        if (groupPlans.length === 1) {
+          selectedPlan.value = groupPlans[0]
+        } else if (groupPlans.length > 1) {
+          renewGroupId.value = groupId
+          showRenewalModal.value = true
+        }
+      }
+    }
+  } catch (err: unknown) { appStore.showError(extractApiErrorMessage(err, t('common.error'))) }
+  finally { loading.value = false }
+  // Fetch active subscriptions (uses cache, non-blocking)
+  subscriptionStore.fetchActiveSubscriptions().catch(() => {})
+})
+</script>

frontend/src/views/user/StripePaymentView.vue

+<template>
+  <component :is="isPopup ? 'div' : AppLayout" :class="isPopup ? 'min-h-screen bg-gray-50 dark:bg-dark-900' : ''">
+    <div class="mx-auto max-w-lg space-y-6 py-8" :class="isPopup ? 'px-4' : ''">
+      <div v-if="loading" class="flex items-center justify-center py-20">
+        <div class="h-8 w-8 animate-spin rounded-full border-4 border-primary-500 border-t-transparent"></div>
+      </div>
+      <div v-else-if="initError" class="card p-8 text-center">
+        <div class="mx-auto mb-4 flex h-16 w-16 items-center justify-center rounded-full bg-red-100 dark:bg-red-900/30">
+          <Icon name="exclamationCircle" size="xl" class="text-red-500" />
+        </div>
+        <h3 class="text-lg font-semibold text-gray-900 dark:text-white">{{ t('payment.stripeLoadFailed') }}</h3>
+        <p class="mt-2 text-sm text-gray-500 dark:text-gray-400">{{ initError }}</p>
+        <button class="btn btn-primary mt-6" @click="router.push('/purchase')">{{ t('payment.result.backToRecharge') }}</button>
+      </div>
+      <template v-else>
+        <!-- Amount header -->
+        <div v-if="order" class="card overflow-hidden">
+          <div class="bg-gradient-to-br from-[#635bff] to-[#4f46e5] px-6 py-6 text-center">
+            <p class="text-sm font-medium text-indigo-200">{{ t('payment.actualPay') }}</p>
+            <p class="mt-1 text-3xl font-bold text-white">&#165;{{ order.pay_amount.toFixed(2) }}</p>
+          </div>
+        </div>
+
+        <!-- WeChat QR Code display -->
+        <template v-if="wechatQrUrl">
+          <div class="card p-6">
+            <div class="flex flex-col items-center space-y-4">
+              <p class="text-lg font-semibold text-gray-900 dark:text-white">{{ t('payment.qr.scanWxpay') }}</p>
+              <div class="relative rounded-lg border-2 border-[#2BB741] bg-green-50 p-4 dark:border-[#2BB741]/70 dark:bg-green-950/20">
+                <img :src="wechatQrUrl" alt="WeChat Pay QR" class="h-56 w-56 rounded" />
+                <div class="pointer-events-none absolute inset-0 flex items-center justify-center">
+                  <span class="rounded-full bg-[#2BB741] p-2 shadow ring-2 ring-white">
+                    <svg class="h-5 w-5 text-white" viewBox="0 0 24 24" fill="currentColor"><path d="M8.691 2.188C3.891 2.188 0 5.476 0 9.53c0 2.212 1.17 4.203 3.002 5.55a.59.59 0 0 1 .213.665l-.39 1.48c-.019.07-.048.141-.048.213 0 .163.13.295.29.295a.326.326 0 0 0 .167-.054l1.903-1.114a.864.864 0 0 1 .717-.098 10.16 10.16 0 0 0 2.837.403c.276 0 .543-.027.811-.05-.857-2.578.157-4.972 1.932-6.446 1.703-1.415 3.882-1.98 5.853-1.838-.576-3.583-4.196-6.348-8.596-6.348zM5.785 5.991c.642 0 1.162.529 1.162 1.18a1.17 1.17 0 0 1-1.162 1.178A1.17 1.17 0 0 1 4.623 7.17c0-.651.52-1.18 1.162-1.18zm5.813 0c.642 0 1.162.529 1.162 1.18a1.17 1.17 0 0 1-1.162 1.178 1.17 1.17 0 0 1-1.162-1.178c0-.651.52-1.18 1.162-1.18zm3.636 4.35c-2.084 0-3.993.672-5.363 1.844-1.188.982-2.004 2.308-2.004 3.862 0 1.207.546 2.355 1.483 3.285.114.113.238.213.358.321l-.105.42c-.021.084-.042.17-.042.253 0 .168.126.258.282.258.065 0 .126-.025.18-.058l1.27-.765a.69.69 0 0 1 .58-.086c.96.282 1.99.437 3.043.437 2.633 0 5.03-.972 6.4-2.5.782-.87 1.258-1.901 1.258-3.006 0-3.328-3.325-6.006-7.34-6.006zm-3.21 3.09c.52 0 .94.429.94.957a.949.949 0 0 1-.94.955.949.949 0 0 1-.94-.955c0-.528.42-.957.94-.957zm4.739 0c.52 0 .94.429.94.957a.949.949 0 0 1-.94.955.949.949 0 0 1-.94-.955c0-.528.42-.957.94-.957z"/></svg>
+                  </span>
+                </div>
+              </div>
+              <p class="text-center text-sm text-gray-500 dark:text-gray-400">{{ t('payment.qr.scanWxpayHint') }}</p>
+            </div>
+          </div>
+          <div class="card p-4 text-center">
+            <p class="text-sm text-gray-500 dark:text-gray-400">{{ t('payment.qr.waitingPayment') }}</p>
+          </div>
+        </template>
+
+        <!-- Alipay redirecting state -->
+        <template v-else-if="redirecting">
+          <div class="card p-6">
+            <div class="flex flex-col items-center space-y-4 py-4">
+              <div class="h-10 w-10 animate-spin rounded-full border-4 border-[#00AEEF] border-t-transparent"></div>
+              <p class="text-sm text-gray-500 dark:text-gray-400">{{ t('payment.qr.payInNewWindowHint') }}</p>
+            </div>
+          </div>
+        </template>
+
+        <!-- Success state -->
+        <template v-else-if="stripeSuccess">
+          <div class="card p-6 text-center">
+            <div class="flex flex-col items-center gap-3 py-4">
+              <div class="flex h-16 w-16 items-center justify-center rounded-full bg-green-100 dark:bg-green-900/30">
+                <Icon name="check" size="lg" class="text-green-500" />
+              </div>
+              <p class="text-lg font-bold text-gray-900 dark:text-white">{{ t('payment.result.success') }}</p>
+              <p class="text-sm text-gray-500 dark:text-gray-400">{{ t('payment.stripeSuccessProcessing') }}</p>
+            </div>
+          </div>
+        </template>
+
+        <!-- Fallback: full Payment Element (no method param or unknown method) -->
+        <template v-else-if="showPaymentElement">
+          <div class="card p-6">
+            <div id="stripe-payment-element" class="min-h-[200px]"></div>
+            <p v-if="stripeError" class="mt-4 text-sm text-red-600 dark:text-red-400">{{ stripeError }}</p>
+            <button class="btn btn-stripe mt-6 w-full py-3 text-base" :disabled="stripeSubmitting || !stripeReady" @click="handleGenericPay">
+              <span v-if="stripeSubmitting" class="flex items-center justify-center gap-2">
+                <span class="h-4 w-4 animate-spin rounded-full border-2 border-white border-t-transparent"></span>
+                {{ t('common.processing') }}
+              </span>
+              <span v-else>{{ t('payment.stripePay') }}</span>
+            </button>
+          </div>
+          <div class="text-center">
+            <button class="btn btn-secondary" @click="router.push('/purchase')">{{ t('payment.result.backToRecharge') }}</button>
+          </div>
+        </template>
+
+        <!-- Error -->
+        <div v-if="stripeError && !showPaymentElement" class="card p-4">
+          <p class="text-sm text-red-600 dark:text-red-400">{{ stripeError }}</p>
+          <button class="btn btn-secondary mt-3 w-full" @click="router.push('/purchase')">{{ t('payment.result.backToRecharge') }}</button>
+        </div>
+      </template>
+    </div>
+  </component>
+</template>
+
+<script setup lang="ts">
+import { ref, computed, nextTick, onMounted, onUnmounted } from 'vue'
+import { useI18n } from 'vue-i18n'
+import { useRoute, useRouter } from 'vue-router'
+import { usePaymentStore } from '@/stores/payment'
+import { paymentAPI } from '@/api/payment'
+import { extractApiErrorMessage } from '@/utils/apiError'
+import type { PaymentOrder } from '@/types/payment'
+import type { Stripe, StripeElements } from '@stripe/stripe-js'
+import AppLayout from '@/components/layout/AppLayout.vue'
+import Icon from '@/components/icons/Icon.vue'
+
+const { t } = useI18n()
+const route = useRoute()
+const router = useRouter()
+const paymentStore = usePaymentStore()
+
+// Popup mode: skip AppLayout when opened with a specific method (alipay/wechat_pay)
+const isPopup = computed(() => !!route.query.method)
+
+const loading = ref(true)
+const initError = ref('')
+const stripeError = ref('')
+const stripeSubmitting = ref(false)
+const stripeSuccess = ref(false)
+const stripeReady = ref(false)
+const order = ref<PaymentOrder | null>(null)
+const wechatQrUrl = ref('')
+const redirecting = ref(false)
+const showPaymentElement = ref(false)
+
+let stripeInstance: Stripe | null = null
+let elementsInstance: StripeElements | null = null
+let redirectTimer: ReturnType<typeof setTimeout> | null = null
+
+onMounted(async () => {
+  const orderId = Number(route.query.order_id)
+  const clientSecret = String(route.query.client_secret || '')
+  const method = String(route.query.method || '')
+
+  if (!orderId || !clientSecret) {
+    loading.value = false
+    initError.value = t('payment.stripeMissingParams')
+    return
+  }
+
+  try {
+    const res = await paymentAPI.getOrder(orderId)
+    order.value = res.data
+
+    await paymentStore.fetchConfig()
+    const publishableKey = paymentStore.config?.stripe_publishable_key
+    if (!publishableKey) { initError.value = t('payment.stripeNotConfigured'); return }
+
+    const { loadStripe } = await import('@stripe/stripe-js')
+    const stripe = await loadStripe(publishableKey)
+    if (!stripe) { initError.value = t('payment.stripeLoadFailed'); return }
+
+    stripeInstance = stripe
+    loading.value = false
+
+    // Direct confirm for specific methods (no Payment Element needed)
+    if (method === 'alipay') {
+      await confirmAlipay(stripe, clientSecret, orderId)
+    } else if (method === 'wechat_pay') {
+      await confirmWechatPay(stripe, clientSecret)
+    } else {
+      // Fallback: render full Payment Element
+      showPaymentElement.value = true
+      await nextTick()
+      mountPaymentElement(stripe, clientSecret)
+    }
+  } catch (err: unknown) {
+    initError.value = extractApiErrorMessage(err, t('payment.stripeLoadFailed'))
+  } finally {
+    loading.value = false
+  }
+})
+
+onUnmounted(() => {
+  if (redirectTimer) clearTimeout(redirectTimer)
+})
+
+async function confirmAlipay(stripe: Stripe, clientSecret: string, orderId: number) {
+  redirecting.value = true
+  const returnUrl = window.location.origin + '/payment/result?order_id=' + orderId + '&status=success'
+  const { error } = await stripe.confirmAlipayPayment(clientSecret, { return_url: returnUrl })
+  if (error) {
+    redirecting.value = false
+    stripeError.value = error.message || t('payment.result.failed')
+  }
+  // If no error, Stripe redirects automatically — nothing else to do
+}
+
+async function confirmWechatPay(stripe: Stripe, clientSecret: string) {
+  const { paymentIntent, error } = await (stripe as Stripe & {
+    confirmWechatPayPayment: (cs: string, opts: Record<string, unknown>) => Promise<{ paymentIntent?: { status: string; next_action?: { wechat_pay_display_qr_code?: { image_data_url?: string } } }; error?: { message?: string } }>
+  }).confirmWechatPayPayment(clientSecret, {
+    payment_method_options: { wechat_pay: { client: 'web' } },
+  })
+
+  if (error) {
+    stripeError.value = error.message || t('payment.result.failed')
+    return
+  }
+
+  // Extract QR code image from next_action
+  const qrData = paymentIntent?.next_action?.wechat_pay_display_qr_code?.image_data_url
+  if (qrData) {
+    wechatQrUrl.value = qrData
+    // Poll for completion
+    startPolling()
+  } else if (paymentIntent?.status === 'succeeded') {
+    stripeSuccess.value = true
+    scheduleClose()
+  } else {
+    stripeError.value = t('payment.result.failed')
+  }
+}
+
+function mountPaymentElement(stripe: Stripe, clientSecret: string) {
+  const isDark = document.documentElement.classList.contains('dark')
+  const elements = stripe.elements({
+    clientSecret,
+    appearance: { theme: isDark ? 'night' : 'stripe', variables: { borderRadius: '8px' } },
+  })
+  elementsInstance = elements
+  const paymentElement = elements.create('payment', {
+    layout: 'tabs',
+    paymentMethodOrder: ['alipay', 'wechat_pay', 'card', 'link'],
+  } as Record<string, unknown>)
+  paymentElement.mount('#stripe-payment-element')
+  paymentElement.on('ready', () => { stripeReady.value = true })
+}
+
+async function handleGenericPay() {
+  if (!stripeInstance || !elementsInstance || stripeSubmitting.value) return
+  stripeSubmitting.value = true
+  stripeError.value = ''
+  try {
+    const { error } = await stripeInstance.confirmPayment({
+      elements: elementsInstance,
+      confirmParams: {
+        return_url: window.location.origin + '/payment/result?order_id=' + route.query.order_id + '&status=success',
+      },
+      redirect: 'if_required',
+    })
+    if (error) {
+      stripeError.value = error.message || t('payment.result.failed')
+    } else {
+      stripeSuccess.value = true
+      scheduleClose()
+    }
+  } catch (err: unknown) {
+    stripeError.value = extractApiErrorMessage(err, t('payment.result.failed'))
+  } finally {
+    stripeSubmitting.value = false
+  }
+}
+
+let pollTimer: ReturnType<typeof setInterval> | null = null
+
+function startPolling() {
+  const orderId = Number(route.query.order_id)
+  if (!orderId) return
+  pollTimer = setInterval(async () => {
+    const o = await paymentStore.pollOrderStatus(orderId)
+    if (!o) return
+    if (o.status === 'COMPLETED' || o.status === 'PAID') {
+      if (pollTimer) { clearInterval(pollTimer); pollTimer = null }
+      stripeSuccess.value = true
+      wechatQrUrl.value = ''
+      scheduleClose()
+    }
+  }, 3000)
+}
+
+function scheduleClose() {
+  if (window.opener) {
+    redirectTimer = setTimeout(() => { window.close() }, 2000)
+  } else {
+    redirectTimer = setTimeout(() => {
+      router.push({ path: '/payment/result', query: { order_id: String(route.query.order_id || ''), status: 'success' } })
+    }, 2000)
+  }
+}
+
+onUnmounted(() => {
+  if (redirectTimer) clearTimeout(redirectTimer)
+  if (pollTimer) clearInterval(pollTimer)
+})
+</script>

frontend/src/views/user/StripePopupView.vue

+<template>
+  <div class="flex min-h-screen items-center justify-center bg-slate-50 p-4 dark:bg-slate-950">
+    <div
+      class="w-full max-w-md space-y-4 rounded-2xl border border-slate-200 bg-white p-6 shadow-lg dark:border-slate-700 dark:bg-slate-900"
+    >
+      <!-- Amount + Order ID -->
+      <div v-if="amount" class="text-center">
+        <p class="text-3xl font-bold" :style="{ color: methodColor }">¥{{ amount }}</p>
+        <p v-if="orderId" class="mt-1 text-sm text-gray-500 dark:text-slate-400">
+          {{ t('payment.orders.orderId') }}: {{ orderId }}
+        </p>
+      </div>
+
+      <!-- Error -->
+      <div v-if="error" class="space-y-3">
+        <div
+          class="rounded-lg border border-red-200 bg-red-50 p-3 text-sm text-red-600 dark:border-red-700 dark:bg-red-900/30 dark:text-red-400"
+        >
+          {{ error }}
+        </div>
+        <button
+          class="w-full text-sm underline dark:text-blue-400 dark:hover:text-blue-300"
+          :style="{ color: methodColor }"
+          @click="closeWindow"
+        >
+          {{ t('common.close') }}
+        </button>
+      </div>
+
+      <!-- Success -->
+      <div v-else-if="success" class="space-y-3 py-4 text-center">
+        <div class="text-5xl text-green-600 dark:text-green-400">✓</div>
+        <p class="text-sm text-gray-500 dark:text-slate-400">{{ t('payment.result.success') }}</p>
+        <button
+          class="text-sm underline dark:text-blue-400 dark:hover:text-blue-300"
+          :style="{ color: methodColor }"
+          @click="closeWindow"
+        >
+          {{ t('common.close') }}
+        </button>
+      </div>
+
+      <!-- Loading / Redirecting -->
+      <div v-else class="flex items-center justify-center py-8">
+        <div
+          class="h-8 w-8 animate-spin rounded-full border-2 border-t-transparent"
+          :style="{ borderColor: methodColor, borderTopColor: 'transparent' }"
+        />
+        <span class="ml-3 text-sm text-gray-500 dark:text-slate-400">{{ hint }}</span>
+      </div>
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { computed, ref, onMounted, onUnmounted } from 'vue'
+import { useI18n } from 'vue-i18n'
+import { useRoute } from 'vue-router'
+
+const METHOD_COLORS: Record<string, string> = {
+  alipay: '#00AEEF',
+  wechat_pay: '#07C160',
+}
+const DEFAULT_METHOD_COLOR = '#635bff'
+
+const { t } = useI18n()
+const route = useRoute()
+
+const orderId = String(route.query.order_id || '')
+const method = String(route.query.method || 'alipay')
+const amount = String(route.query.amount || '')
+
+const methodColor = computed(() => METHOD_COLORS[method] || DEFAULT_METHOD_COLOR)
+
+const error = ref('')
+const success = ref(false)
+const hint = ref(t('payment.stripePopup.redirecting'))
+
+let pollTimer: ReturnType<typeof setInterval> | null = null
+
+function closeWindow() { window.close() }
+
+onMounted(() => {
+  const handler = (event: MessageEvent) => {
+    if (event.origin !== window.location.origin) return
+    if (event.data?.type !== 'STRIPE_POPUP_INIT') return
+    window.removeEventListener('message', handler)
+    initStripe(event.data.clientSecret, event.data.publishableKey)
+  }
+  window.addEventListener('message', handler)
+
+  if (window.opener) {
+    window.opener.postMessage({ type: 'STRIPE_POPUP_READY' }, window.location.origin)
+  }
+
+  setTimeout(() => {
+    if (!error.value && !success.value) {
+      error.value = t('payment.stripePopup.timeout')
+    }
+  }, 15000)
+})
+
+onUnmounted(() => {
+  if (pollTimer) clearInterval(pollTimer)
+})
+
+async function initStripe(clientSecret: string, publishableKey: string) {
+  if (!clientSecret || !publishableKey) {
+    error.value = t('payment.stripeMissingParams')
+    return
+  }
+  try {
+    const { loadStripe } = await import('@stripe/stripe-js')
+    const stripe = await loadStripe(publishableKey)
+    if (!stripe) { error.value = t('payment.stripeLoadFailed'); return }
+
+    const returnUrl = window.location.origin + '/payment/result?order_id=' + orderId + '&status=success'
+
+    if (method === 'alipay') {
+      // Alipay: redirect this popup to Alipay payment page
+      const { error: err } = await stripe.confirmAlipayPayment(clientSecret, { return_url: returnUrl })
+      if (err) error.value = err.message || t('payment.result.failed')
+    } else if (method === 'wechat_pay') {
+      // WeChat: Stripe shows its built-in QR dialog, user scans, promise resolves
+      hint.value = t('payment.stripePopup.loadingQr')
+      const result = await (stripe as any).confirmWechatPayPayment(clientSecret, {
+        payment_method_options: { wechat_pay: { client: 'web' } },
+      })
+      if (result.error) {
+        error.value = result.error.message || t('payment.result.failed')
+      } else if (result.paymentIntent?.status === 'succeeded') {
+        success.value = true
+        setTimeout(closeWindow, 2000)
+      } else {
+        // Payment not completed (user closed QR dialog)
+        startPolling()
+      }
+    }
+  } catch (err: unknown) {
+    error.value = err instanceof Error ? err.message : t('payment.stripeLoadFailed')
+  }
+}
+
+function startPolling() {
+  pollTimer = setInterval(async () => {
+    try {
+      const token = document.cookie.split('; ').find(c => c.startsWith('token='))?.split('=')[1]
+        || localStorage.getItem('token') || ''
+      const res = await fetch('/api/v1/payment/orders/' + orderId, {
+        headers: token ? { Authorization: 'Bearer ' + token } : {},
+        credentials: 'include',
+      })
+      if (!res.ok) return
+      const data = await res.json()
+      const status = data?.data?.status
+      if (status === 'COMPLETED' || status === 'PAID') {
+        if (pollTimer) { clearInterval(pollTimer); pollTimer = null }
+        success.value = true
+        setTimeout(closeWindow, 2000)
+      }
+    } catch { /* ignore */ }
+  }, 3000)
+}
+</script>

frontend/src/views/user/SubscriptionsView.vue

@@ -28,39 +28,50 @@
         <div
           v-for="subscription in subscriptions"
           :key="subscription.id"
-          class="card overflow-hidden"
+          class="overflow-hidden rounded-2xl border bg-white dark:bg-dark-800"
+          :class="platformBorderClass(subscription.group?.platform || '')"
         >
           <!-- Header -->
           <div
             class="flex items-center justify-between border-b border-gray-100 p-4 dark:border-dark-700"
           >
             <div class="flex items-center gap-3">
-              <div
-                class="flex h-10 w-10 items-center justify-center rounded-xl bg-purple-100 dark:bg-purple-900/30"
-              >
-                <Icon name="creditCard" size="md" class="text-purple-600 dark:text-purple-400" />
-              </div>
+              <div :class="['h-1.5 w-1.5 shrink-0 rounded-full', platformAccentDotClass(subscription.group?.platform || '')]" />
               <div>
-                <h3 class="font-semibold text-gray-900 dark:text-white">
-                  {{ subscription.group?.name || `Group #${subscription.group_id}` }}
-                </h3>
-                <p class="text-xs text-gray-500 dark:text-dark-400">
-                  {{ subscription.group?.description || '' }}
+                <div class="flex items-center gap-2">
+                  <h3 class="font-semibold text-gray-900 dark:text-white">
+                    {{ subscription.group?.name || `Group #${subscription.group_id}` }}
+                  </h3>
+                  <span :class="['rounded-md border px-2 py-0.5 text-[11px] font-medium', platformBadgeClass(subscription.group?.platform || '')]">
+                    {{ platformLabel(subscription.group?.platform || '') }}
+                  </span>
+                </div>
+                <p v-if="subscription.group?.description" class="mt-0.5 text-xs text-gray-500 dark:text-dark-400">
+                  {{ subscription.group.description }}
                 </p>
               </div>
             </div>
-            <span
-              :class="[
-                'badge',
-                subscription.status === 'active'
-                  ? 'badge-success'
-                  : subscription.status === 'expired'
-                    ? 'badge-warning'
-                    : 'badge-danger'
-              ]"
-            >
-              {{ t(`userSubscriptions.status.${subscription.status}`) }}
-            </span>
+            <div class="flex items-center gap-2">
+              <span
+                :class="[
+                  'rounded-full px-2 py-0.5 text-xs font-medium',
+                  subscription.status === 'active'
+                    ? 'bg-emerald-100 text-emerald-700 dark:bg-emerald-900/40 dark:text-emerald-300'
+                    : subscription.status === 'expired'
+                      ? 'bg-gray-100 text-gray-600 dark:bg-dark-700 dark:text-gray-400'
+                      : 'bg-red-100 text-red-700 dark:bg-red-900/40 dark:text-red-300'
+                ]"
+              >
+                {{ t(`userSubscriptions.status.${subscription.status}`) }}
+              </span>
+              <button
+                v-if="subscription.status === 'active'"
+                :class="['rounded-lg px-3 py-1.5 text-xs font-semibold text-white transition-colors', platformButtonClass(subscription.group?.platform || '')]"
+                @click="router.push({ path: '/purchase', query: { tab: 'subscription', group: String(subscription.group_id) } })"
+              >
+                {{ t('payment.renewNow') }}
+              </button>
+            </div>
           </div>
 
           <!-- Usage Progress -->
@@ -237,14 +248,27 @@
 <script setup lang="ts">
 import { ref, onMounted } from 'vue'
 import { useI18n } from 'vue-i18n'
+import { useRouter } from 'vue-router'
 import { useAppStore } from '@/stores/app'
 import subscriptionsAPI from '@/api/subscriptions'
 import type { UserSubscription } from '@/types'
 import AppLayout from '@/components/layout/AppLayout.vue'
 import Icon from '@/components/icons/Icon.vue'
 import { formatDateOnly } from '@/utils/format'
+import { platformBorderClass, platformBadgeClass, platformButtonClass, platformLabel } from '@/utils/platformColors'
+
+function platformAccentDotClass(p: string): string {
+  switch (p) {
+    case 'anthropic': return 'bg-orange-500'
+    case 'openai': return 'bg-emerald-500'
+    case 'antigravity': return 'bg-purple-500'
+    case 'gemini': return 'bg-blue-500'
+    default: return 'bg-gray-400'
+  }
+}
 
 const { t } = useI18n()
+const router = useRouter()
 const appStore = useAppStore()
 
 const subscriptions = ref<UserSubscription[]>([])

frontend/src/views/user/UserOrdersView.vue

+<template>
+  <AppLayout>
+    <div class="space-y-4">
+      <!-- Filters -->
+      <div class="card p-4">
+        <div class="flex flex-wrap items-center gap-3">
+          <Select v-model="currentFilter" :options="statusFilters" class="w-36" @change="fetchOrders" />
+          <div class="flex flex-1 items-center justify-end gap-2">
+            <button @click="fetchOrders" :disabled="loading" class="btn btn-secondary" :title="t('common.refresh')">
+              <Icon name="refresh" size="md" :class="loading ? 'animate-spin' : ''" />
+            </button>
+            <button class="btn btn-primary" @click="router.push('/purchase')">{{ t('payment.result.backToRecharge') }}</button>
+          </div>
+        </div>
+      </div>
+
+      <!-- Table -->
+      <OrderTable :orders="orders" :loading="loading">
+        <template #actions="{ row }">
+          <div class="flex items-center gap-2">
+            <button v-if="row.status === 'PENDING'" @click="handleCancel(row.id)" class="inline-flex items-center gap-1 rounded-md px-2 py-1 text-xs font-medium text-yellow-600 hover:bg-yellow-50 dark:text-yellow-400 dark:hover:bg-yellow-900/20">
+              <Icon name="x" size="sm" />
+              <span>{{ t('payment.orders.cancel') }}</span>
+            </button>
+            <button v-if="row.status === 'COMPLETED'" @click="openRefundDialog(row)" class="inline-flex items-center gap-1 rounded-md px-2 py-1 text-xs font-medium text-purple-600 hover:bg-purple-50 dark:text-purple-400 dark:hover:bg-purple-900/20">
+              <Icon name="dollar" size="sm" />
+              <span>{{ t('payment.orders.requestRefund') }}</span>
+            </button>
+          </div>
+        </template>
+      </OrderTable>
+
+      <!-- Pagination -->
+      <Pagination
+        v-if="pagination.total > 0"
+        :page="pagination.page"
+        :total="pagination.total"
+        :page-size="pagination.page_size"
+        @update:page="handlePageChange"
+        @update:pageSize="handlePageSizeChange"
+      />
+    </div>
+
+    <!-- Cancel Confirm Dialog -->
+    <BaseDialog :show="!!cancelTargetId" :title="t('payment.orders.cancel')" width="narrow" @close="cancelTargetId = null">
+      <p class="text-sm text-gray-600 dark:text-gray-300">{{ t('payment.confirmCancel') }}</p>
+      <template #footer>
+        <div class="flex justify-end gap-3">
+          <button class="btn btn-secondary" @click="cancelTargetId = null">{{ t('common.cancel') }}</button>
+          <button class="btn btn-danger" :disabled="actionLoading" @click="confirmCancel">{{ actionLoading ? t('common.processing') : t('payment.orders.cancel') }}</button>
+        </div>
+      </template>
+    </BaseDialog>
+
+    <!-- Refund Dialog -->
+    <BaseDialog :show="!!refundTarget" :title="t('payment.orders.requestRefund')" @close="refundTarget = null">
+      <div v-if="refundTarget" class="space-y-4">
+        <div class="rounded-xl bg-gray-50 p-4 dark:bg-dark-800">
+          <div class="flex justify-between text-sm">
+            <span class="text-gray-500 dark:text-gray-400">{{ t('payment.orders.orderId') }}</span>
+            <span class="font-mono text-gray-900 dark:text-white">#{{ refundTarget.id }}</span>
+          </div>
+          <div class="mt-2 flex justify-between text-sm">
+            <span class="text-gray-500 dark:text-gray-400">{{ t('payment.orders.amount') }}</span>
+            <span class="text-gray-900 dark:text-white">${{ refundTarget.amount.toFixed(2) }}</span>
+          </div>
+        </div>
+        <div>
+          <label class="input-label">{{ t('payment.refundReason') }}</label>
+          <textarea v-model="refundReason" rows="3" class="input mt-1 w-full" :placeholder="t('payment.refundReasonPlaceholder')" />
+        </div>
+      </div>
+      <template #footer>
+        <div class="flex justify-end gap-3">
+          <button class="btn btn-secondary" @click="refundTarget = null">{{ t('common.cancel') }}</button>
+          <button class="btn btn-primary" :disabled="actionLoading || !refundReason.trim()" @click="confirmRefund">{{ actionLoading ? t('common.processing') : t('payment.orders.requestRefund') }}</button>
+        </div>
+      </template>
+    </BaseDialog>
+  </AppLayout>
+</template>
+
+<script setup lang="ts">
+import { ref, reactive, computed, onMounted } from 'vue'
+import { useI18n } from 'vue-i18n'
+import { useRouter } from 'vue-router'
+import { useAppStore } from '@/stores'
+import { paymentAPI } from '@/api/payment'
+import { extractApiErrorMessage } from '@/utils/apiError'
+import type { PaymentOrder } from '@/types/payment'
+import AppLayout from '@/components/layout/AppLayout.vue'
+import Pagination from '@/components/common/Pagination.vue'
+import BaseDialog from '@/components/common/BaseDialog.vue'
+import Select from '@/components/common/Select.vue'
+import Icon from '@/components/icons/Icon.vue'
+import OrderTable from '@/components/payment/OrderTable.vue'
+
+const { t } = useI18n()
+const router = useRouter()
+const appStore = useAppStore()
+
+const loading = ref(false)
+const actionLoading = ref(false)
+const orders = ref<PaymentOrder[]>([])
+const currentFilter = ref('')
+const cancelTargetId = ref<number | null>(null)
+const refundTarget = ref<PaymentOrder | null>(null)
+const refundReason = ref('')
+const pagination = reactive({ page: 1, page_size: 20, total: 0 })
+
+const statusFilters = computed(() => [
+  { value: '', label: t('common.all') },
+  { value: 'PENDING', label: t('payment.status.pending') },
+  { value: 'COMPLETED', label: t('payment.status.completed') },
+  { value: 'FAILED', label: t('payment.status.failed') },
+  { value: 'REFUNDED', label: t('payment.status.refunded') },
+])
+
+async function fetchOrders() {
+  loading.value = true
+  try {
+    const res = await paymentAPI.getMyOrders({
+      page: pagination.page,
+      page_size: pagination.page_size,
+      status: currentFilter.value || undefined,
+    })
+    orders.value = res.data.items || []
+    pagination.total = res.data.total || 0
+  } catch (err: unknown) {
+    appStore.showError(extractApiErrorMessage(err, t('common.error')))
+  } finally {
+    loading.value = false
+  }
+}
+
+function handlePageChange(page: number) { pagination.page = page; fetchOrders() }
+function handlePageSizeChange(size: number) { pagination.page_size = size; pagination.page = 1; fetchOrders() }
+
+function handleCancel(orderId: number) { cancelTargetId.value = orderId }
+
+async function confirmCancel() {
+  if (!cancelTargetId.value) return
+  actionLoading.value = true
+  try {
+    await paymentAPI.cancelOrder(cancelTargetId.value)
+    appStore.showSuccess(t('common.success'))
+    cancelTargetId.value = null
+    await fetchOrders()
+  } catch (err: unknown) {
+    appStore.showError(extractApiErrorMessage(err, t('common.error')))
+  } finally {
+    actionLoading.value = false
+  }
+}
+
+function openRefundDialog(order: PaymentOrder) { refundTarget.value = order; refundReason.value = '' }
+
+async function confirmRefund() {
+  if (!refundTarget.value || !refundReason.value.trim()) return
+  actionLoading.value = true
+  try {
+    await paymentAPI.requestRefund(refundTarget.value.id, { reason: refundReason.value.trim() })
+    appStore.showSuccess(t('common.success'))
+    refundTarget.value = null
+    refundReason.value = ''
+    await fetchOrders()
+  } catch (err: unknown) {
+    appStore.showError(extractApiErrorMessage(err, t('common.error')))
+  } finally {
+    actionLoading.value = false
+  }
+}
+
+onMounted(() => fetchOrders())
+</script>