feat(usergold): 为用户金币相关页面的地区选择添加多选功能，传数组

src/views/usergold/clientCountBalance.vue

@@ -255,7 +255,7 @@ const exportExcel = async function () {
           </div>
           <div class="head-card-element">
             <el-text class="mx-1" size="large">所属地区：</el-text>
-            <el-select v-model="user.market" placeholder="请选择所属地区" style="width: 180px" clearable>
+            <el-select v-model="user.market" placeholder="请选择所属地区" style="width: 180px" clearable multiple>
               <el-option v-for="item in market" :key="item.value" :label="item.label" :value="item.value"/>
             </el-select>
           </div>

src/views/usergold/clientCountDetail.vue

@@ -400,8 +400,8 @@ onMounted(async function () {
             <el-col :span="6">
               <div class="head-card-element">
                 <el-text class="mx-1" size="large">所属地区：</el-text>
-                <el-select v-model="goldDetail.market" placeholder="请选择所属地区" style="width: 180px" clearable
-                  :loading="isLoadingArea">
+                <el-select v-model="goldDetail.market" placeholder="请选择所属地区" style="width: 180px" clearable  multiple
+                           :loading="isLoadingArea">
                   <el-option v-for="item in market" :key="item.value || item" :label="item.label || item"
                     :value="item.value || item" />
                 </el-select>