refactor(agent): 重构智能体页面布局和样式

-调整了智能体卡片的布局结构，优化了标题和描述的显示方式
- 改进了历史对话的展示样式，增加了滚动指示器
- 统一了标签和图标的样式，提升了视觉一致性
- 优化了搜索框和卡片列表的样式，提高了用户体验

src/router/routes/modules/agent.ts

@@ -9,7 +9,7 @@ const COMPONENTS: AppRouteRecordRaw[] = [
     name: 'Agent',
     redirect: 'agent/index',
     meta: {
-      locale: '扣子智能体',
+      locale: '灵机ai',
       icon: IconRepository,
       requiresAuth: true,
       requireLogin: true,
@@ -22,7 +22,7 @@ const COMPONENTS: AppRouteRecordRaw[] = [
         name: 'AgentIndex',
         component: () => import('@/views/agent/index'),
         meta: {
-          locale:'ai应用',
+          locale:'智能体应用',
           requiresAuth: false,
           requireLogin: true,
         },