feat(M08-A): 接入权益和余额下单抵扣

miniapp/pages/room/detail.wxml

@@ -9,10 +9,19 @@
     <button size="mini" class="{{durationMinutes === 180 ? 'selected' : ''}}" data-minutes="180" bindtap="setDuration">3小时</button>
   </view>
 
+  <view class="section-title">权益抵扣</view>
+  <view class="benefit-grid">
+    <input placeholder="优惠券ID" value="{{couponGrantId}}" data-field="couponGrantId" bindinput="updateBenefitField" />
+    <input placeholder="套餐ID" value="{{packageHoldingId}}" data-field="packageHoldingId" bindinput="updateBenefitField" />
+    <input placeholder="套餐分钟" type="number" value="{{packageMinutes}}" data-field="packageMinutes" bindinput="updateBenefitField" />
+    <input placeholder="套餐抵扣元" type="digit" value="{{packageCreditYuan}}" data-field="packageCreditYuan" bindinput="updateBenefitField" />
+  </view>
+
   <view class="action-grid">
     <button loading="{{loading}}" bindtap="quote">报价</button>
     <button loading="{{loading}}" bindtap="reserve">预占</button>
     <button loading="{{loading}}" bindtap="createWechatPayment">微信支付</button>
+    <button loading="{{loading}}" bindtap="createBalancePayment">余额支付</button>
     <button loading="{{loading}}" bindtap="createTestPayment">测试支付</button>
     <button loading="{{loading}}" bindtap="completeTestPayment">完成测试支付</button>
   </view>
@@ -30,6 +39,8 @@
     <view class="result-title">订单</view>
     <view>订单编号：{{order.orderId}}</view>
     <view wx:if="{{order.reservationId}}">预占编号：{{order.reservationId}}</view>
+    <view wx:if="{{order.quote.discountCents}}">优惠抵扣：{{order.quote.discountCents}}分</view>
+    <view wx:if="{{order.quote.packageCreditCents}}">套餐抵扣：{{order.quote.packageCreditCents}}分</view>
     <button size="mini" data-order-id="{{order.orderId}}" bindtap="openOrder">查看订单</button>
   </view>