fix(bpm): 修复流程实例详情页面按钮显示问题

- 移除了转办按钮的注释标记，使其正常显示
- 调整了加签按钮的注释格式，确保其正确渲染
- 保留了委派和回退按钮的功能实现

src/views/bpm/processInstance/detail/index.vue

@@ -41,7 +41,7 @@
             <Icon icon="ep:close" />
             不通过
           </el-button>
-          <!--
+
           <el-button type="primary" @click="openTaskUpdateAssigneeForm(item.id)">
             <Icon icon="ep:edit" />
             转办
@@ -50,11 +50,12 @@
             <Icon icon="ep:position" />
             委派
           </el-button>
-          <el-button type="primary" @click="handleSign(item)">
-            <Icon icon="ep:plus" />
-            加签
-          </el-button>
-          -->
+          <!--
+         <el-button type="primary" @click="handleSign(item)">
+           <Icon icon="ep:plus" />
+           加签
+         </el-button>
+         -->
           <el-button type="warning" @click="handleBack(item)">
             <Icon icon="ep:back" />
             回退