优化邮箱换绑

src/views/UserCenter/Setting.vue

@@ -97,7 +97,7 @@
             <div class="dialog-footer">
                 <el-button @click="dialogVisible = false">取消</el-button>
                 <el-button type="primary" @click="submitForm(bindFormRef)" :loading="loading">
-                  确定{{dialogType==1?'绑定':'更换'}}
+                  确定<template v-if="dialogType==1">{{Mailbox?'换绑':'绑定'}}</template><template v-else>更换</template>
                 </el-button>
               </div>
         </template>