consumer模块完成度95%，检查消费者前端bug并修复

pages/mall/consumer/subscription/plan-detail.uvue

@@ -7,7 +7,7 @@
     <view v-else-if="plan == null" class="empty">未找到该方案</view>
     <view v-else class="card">
       <text class="name">{{ plan['name'] }}</text>
-      <text class="desc">{{ plan['description'] || '—' }}</text>
+      <text class="desc">{{ plan['description'] != null && (plan['description'] as string).length > 0 ? plan['description'] : '—' }}</text>
 
       <view class="price-row">
         <text class="price">¥{{ plan['price'] }}</text>
@@ -45,10 +45,11 @@ const toFeatureArray = (features: any): Array<string> => {
   const arr: Array<string> = []
   if (features == null) return arr
   if (features instanceof UTSJSONObject) {
-    const keys = Object.keys(features as any)
-    for (let i = 0; i < keys.length; i++) {
-      const k = keys[i]
-      const v = (features as UTSJSONObject)[k]
+    const featureMap = (features as UTSJSONObject).toMap()
+    const entries = featureMap.entries()
+    for (let i = 0; i < entries.length; i++) {
+      const entry = entries[i]
+      const v = entry.value
       const vs = typeof v === 'string' ? v : JSON.stringify(v)
       arr.push(vs)
     }