fix: 修复设备标识提取、单程票逻辑及前端行程块显示

- 调整后端设备标识提取优先级，优先使用machine_id/machineId字段
- 修复单程票检票时剩余乘车次数的计算逻辑，单程票使用后直接置0
- 前端为行程块添加ID，切换单程票模式时隐藏该块并重置乘车次数为1

web/ticket-order.html

@@ -136,7 +136,7 @@
                   </label>
                 </div>
               </div>
-              <div class="jr-form-block jr-trip-block">
+              <div class="jr-form-block jr-trip-block" id="tripsBlock">
                 <div class="jr-field-head">
                   <label class="jr-field-label" for="trips">乘次数量</label>
                   <span class="jr-field-note">至少 1 次</span>

web/ticket-order.js

@@ -715,10 +715,13 @@
       if (isSingle) {
           document.getElementById('normalTicketView').style.display = 'none';
           document.getElementById('singleTicketView').style.display = 'block';
+          document.getElementById('tripsBlock').style.display = 'none';
+          if (tripsEl) tripsEl.value = 1;
           renderSingleSegments();
       } else {
           document.getElementById('normalTicketView').style.display = 'block';
           document.getElementById('singleTicketView').style.display = 'none';
+          document.getElementById('tripsBlock').style.display = 'block';
       }
       previewPrice(true);
   }