fix: 移除收银台多余的打开支付页面按钮，简化扫码支付流程

frontend/src/views/user/Checkout.vue

@@ -25,21 +25,12 @@
         <div class="amount-cny">订单金额：¥{{ orderAmount }}</div>
       </div>
 
-      <div class="address-section" v-if="paymentInfo.payment_url">
-        <div class="address-label">支付链接</div>
-        <div class="address-box">
-          <span class="address-text">{{ paymentInfo.payment_url }}</span>
-          <el-button type="primary" size="small" @click="copyText(paymentInfo.payment_url)">复制</el-button>
-        </div>
-        <el-button type="success" size="small" class="open-link-btn" @click="openPaymentUrl">打开支付页面</el-button>
-      </div>
-
-      <div class="qr-section" v-if="paymentInfo.payment_url">
+      <div class="qr-section">
         <div class="qr-label">扫码支付</div>
         <div class="qr-wrapper">
           <canvas ref="qrCanvas"></canvas>
         </div>
-        <div class="qr-tip">请使用手机浏览器扫码打开支付页面</div>
+        <div class="qr-tip">请使用手机浏览器扫码完成支付</div>
       </div>
 
       <div class="tips">
@@ -101,12 +92,15 @@ async function createPayment() {
     const orderRes: any = await orderApi.getById(orderId)
     orderAmount.value = orderRes.data?.total_amount || 0
 
-    if (qrCanvas.value && res.data.payment_url) {
-      await QRCode.toCanvas(qrCanvas.value, res.data.payment_url, {
-        width: 180,
-        margin: 2,
-        color: { dark: '#000', light: '#fff' }
-      })
+    if (qrCanvas.value) {
+      const qrContent = res.data.payment_url || res.data.token || ''
+      if (qrContent) {
+        await QRCode.toCanvas(qrCanvas.value, qrContent, {
+          width: 180,
+          margin: 2,
+          color: { dark: '#000', light: '#fff' }
+        })
+      }
     }
 
     startCountdown()
@@ -141,17 +135,6 @@ function startPolling() {
   }, 5000)
 }
 
-function copyText(text: string) {
-  navigator.clipboard.writeText(text)
-  ElMessage.success('已复制')
-}
-
-function openPaymentUrl() {
-  if (paymentInfo.value?.payment_url) {
-    window.open(paymentInfo.value.payment_url, '_blank')
-  }
-}
-
 onMounted(() => {
   createPayment()
 })
@@ -254,35 +237,6 @@ onUnmounted(() => {
   }
 }
 
-.address-section {
-  width: 100%;
-  margin-bottom: 24px;
-
-  .address-label {
-    font-size: 13px;
-    color: rgba(255, 255, 255, 0.5);
-    margin-bottom: 8px;
-  }
-
-  .address-box {
-    display: flex;
-    align-items: center;
-    gap: 8px;
-    background: rgba(255, 255, 255, 0.06);
-    border: 1px solid rgba(255, 255, 255, 0.08);
-    border-radius: 8px;
-    padding: 10px 12px;
-
-    .address-text {
-      flex: 1;
-      font-size: 13px;
-      color: #fff;
-      word-break: break-all;
-      font-family: monospace;
-    }
-  }
-}
-
 .qr-section {
   margin-bottom: 24px;
   text-align: center;
@@ -307,11 +261,6 @@ onUnmounted(() => {
   }
 }
 
-.open-link-btn {
-  margin-top: 8px;
-  width: 100%;
-}
-
 .tips {
   width: 100%;
   background: rgba(255, 255, 255, 0.03);