fix: 防止用户误取消已付款订单-回调重新激活+2分钟内禁止取消+成功页30s超时提示

src/handlers/payment.rs

@@ -901,6 +901,11 @@ fn build_success_html(order_no: &str) -> String {
     <div class="tip">系统会自动处理，无需重复操作</div>
     <div class="order-no">订单号: {2}</div>
   </div>
+  <div id="timeoutView" style="display:none">
+    <p style="color:#666;font-size:14px">确认时间稍长，请返回小程序查看订单状态</p>
+    <p style="color:#999;font-size:12px">系统会在确认后自动为您开通会员，请勿重复支付</p>
+    <div class="order-no">订单号: {2}</div>
+  </div>
 </div>
 <script>
   (function poll(){{
@@ -916,12 +921,22 @@ fn build_success_html(order_no: &str) -> String {
       if (data.success && data.data.order_status === 'paid') {{
         document.getElementById('confirmedView').style.display = 'block';
         document.getElementById('pendingView').style.display = 'none';
+        document.getElementById('timeoutView').style.display = 'none';
+      }} else if (data.success && data.data.order_status === 'cancelled') {{
+        // 订单被取消（可能是误操作），继续轮询等待支付宝回调重新激活
+        setTimeout(poll, 2000);
       }} else {{
         setTimeout(poll, 2000);
       }}
     }})
     .catch(function(){{ setTimeout(poll, 2000); }});
   }})();
+  // 30 秒后显示返回提示（不阻断轮询）
+  setTimeout(function(){{
+    if (document.getElementById('confirmedView').style.display !== 'block') {{
+      document.getElementById('timeoutView').style.display = 'block';
+    }}
+  }}, 30000);
 </script>
 </body>
 </html>"##,