consumer模块完成度95%，检查消费者前端bug并修复

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

@@ -10,7 +10,7 @@
           <text class="plan-name">{{ p['name'] }}</text>
           <text v-if="p['billing_period'] === 'yearly'" class="badge">年付优惠</text>
         </view>
-        <text class="plan-desc">{{ p['description'] || '适用于大部分使用场景' }}</text>
+        <text class="plan-desc">{{ p['description'] != null && (p['description'] as string).length > 0 ? p['description'] : '适用于大部分使用场景' }}</text>
         <view class="price-row">
           <text class="price">¥{{ p['price'] }}</text>
           <text class="period">/{{ p['billing_period'] === 'yearly' ? '年' : '月' }}</text>
@@ -43,10 +43,11 @@ 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)
     }