feat: 更新模态框标题，从“选择账号”更改为“添加账号至项目成员”

app/view/sp_setting/user_modal.ejs

@@ -2,7 +2,7 @@
     <div class="modal-dialog modal-lg" role="document">
         <div class="modal-content">
             <div class="modal-header">
-                <h5 class="modal-title">选择账号</h5>
+                <h5 class="modal-title">添加账号至项目成员</h5>
             </div>
             <div class="modal-body">
                 <div class="d-flex justify-content-between mb-2">