fix：优化用户avatar显示逻辑（用户未设置avatar则使用系统default_avatar显示）

pages/activity/groupon/detail.vue

@@ -98,7 +98,7 @@
         <view class="ss-m-t-60 ss-flex ss-flex-wrap ss-row-center">
           <!-- 团长 -->
           <view class="header-avatar ss-m-r-24 ss-m-b-20">
-            <image :src="sheep.$url.cdn(state.data.headRecord.avatar)" class="avatar-img"></image>
+            <image :src="sheep.$url.cdn(state.data.headRecord.avatar) || sheep.$url.static('/static/img/shop/default_avatar.png')" class="avatar-img"></image>
             <view class="header-tag ss-flex ss-col-center ss-row-center">团长</view>
           </view>
           <!-- 团员 -->
@@ -107,7 +107,7 @@
             v-for="item in state.data.memberRecords"
             :key="item.id"
           >
-            <image :src="sheep.$url.cdn(item.avatar)" class="avatar-img"></image>
+            <image :src="sheep.$url.cdn(item.avatar) || sheep.$url.static('/static/img/shop/default_avatar.png')" class="avatar-img"></image>
             <view
               class="header-tag ss-flex ss-col-center ss-row-center"
               v-if="item.is_leader == '1'"

pages/user/info.vue

@@ -15,7 +15,7 @@
             class="content-img"
             isPreview
             :current="0"
-            :src="state.model?.avatar"
+            :src="state.model?.avatar || sheep.$url.static('/static/img/shop/default_avatar.png')"
             :height="160"
             :width="160"
             :radius="80"

sheep/components/s-user-card/s-user-card.vue

@@ -5,7 +5,7 @@
       <view class="left-box ss-flex ss-col-center ss-m-l-36">
         <view class="avatar-box ss-m-r-24">
           <image class="avatar-img" :src="
-              isLogin
+              isLogin && userInfo.avatar
                 ? sheep.$url.cdn(userInfo.avatar)
                 : sheep.$url.static('/static/img/shop/default_avatar.png')"
                  mode="aspectFill" @tap="sheep.$router.go('/pages/user/info')">