fix(miniprogram): remove workbench header subtitle text

Co-authored-by: Cursor <cursoragent@cursor.com>

miniprogram/pages/workbench/workbench.vue

@@ -73,7 +73,6 @@ const handleLogout = async () => {
       <view class="mp-header__body">
         <view class="mp-header__titles">
           <text class="mp-header__title">山峡化工工作台</text>
-          <text class="mp-header__meta">选择业务模块，进入对应功能办理</text>
         </view>
         <view class="mp-header__user-stack">
           <text class="mp-header__user-line">{{ displayName }}，欢迎您</text>