refactor(frontend): 优化 UI 基础组件

- 添加默认 class 属性支持
- 改进组件类型定义
- 优化属性配置

frontend/src/components/ui/select-content.vue

@@ -35,8 +35,12 @@ interface Props {
 }
 
 const props = withDefaults(defineProps<Props>(), {
+  class: undefined,
   position: 'popper',
+  side: undefined,
   sideOffset: 4,
+  align: undefined,
+  alignOffset: undefined,
 })
 
 const contentClass = computed(() =>