```

feat(WorkflowDetail): 优化用户头像和昵称显示逻辑

- 修改el-avatar组件的src属性，优先使用ruleForm.userAvatar，
  回退到appStore.avatarDefault
- 将静态姓名"张三"替换为动态的ruleForm.nickName
- 添加空值处理，避免显示undefined
- 调整样式间距，增加mt5类提升标签区域的上边距
```

src/pages/WorkflowDetail.vue

@@ -81,10 +81,10 @@
           <div class="padding16 bg_color_fff border_radius_16 box_shadow_card mt20">
             <div class="flex-center-between">
               <div class="flex-between flex_1">
-                <el-avatar :size="50" :src="appStore.avatar" />
+                <el-avatar :size="50" :src=" ruleForm.userAvatar || appStore.avatarDefault " />
                 <div class="ml10 flex_1">
-                  <div class="font_size18 bold">张三</div>
-                  <div class="gap5">
+                  <div class="font_size18 bold">{{ruleForm.nickName || ''}}</div>
+                  <div class="gap5 mt5">
                     <el-tag type="primary" v-for="item in 5" :key="item" >技能标签</el-tag>
                   </div>
                 </div>