feat(ui): 更新任务流程卡片样式和图标

- 引入 Element Plus 图标组件替代原有文字图标
- 移除卡片阴影属性优化视觉效果
- 调整结果区域按钮组布局对齐方式
- 更新文本域样式增加颜色变量支持
- 注释掉编辑卡片背景色定义
- 添加图标依赖包到项目配置

frontend/src/layout/components/Main/TaskTemplate/TaskResult/index.vue

@@ -322,7 +322,7 @@ defineExpose({
     <div class="text-[18px] font-bold mb-[18px] flex justify-between items-center px-[20px]">
       <span class="text-[var(--color-text-title-header)]">执行结果</span>
       <div
-        class="flex items-center gap-[14px] task-button-group"
+        class="flex items-center justify-end gap-[14px] task-button-group min-w-[175px]"
         @mouseleave="handleButtonMouseLeave"
       >
         <!-- 任务过程按钮 -->
@@ -416,7 +416,6 @@ defineExpose({
           <el-card
             class="card-item w-full relative"
             :class="agentsStore.currentTask?.StepName === item.StepName ? 'active-card' : ''"
-            :shadow="true"
             :id="`task-results-${item.Id}-0`"
             @click="emit('setCurrentTask', item)"
           >
@@ -487,7 +486,6 @@ defineExpose({
 
           <el-card
             class="card-item w-full relative output-object-card"
-            :shadow="true"
             :class="agentsStore.currentTask?.StepName === item.StepName ? 'active-card' : ''"
             :id="`task-results-${item.Id}-1`"
             @click="emit('setCurrentTask', item)"