refactor(search): 优化搜索页面历史关键词展示及搜索逻辑

- 重构历史关键词展示布局，使用 Flex 组件实现灵活布局
- 优化关键词点击事件处理，提升用户体验
- 调整搜索逻辑，解决测试中发现的问题- 统一三个搜索页面（已签约、未签约、全部）的展示和搜索逻辑

src/main/ets/view/RefreshView.ets

@@ -5,6 +5,7 @@ export struct RefreshView {
   @Link isLoading: boolean
   @Prop data: Array<ESObject>
   @Require keyGenerator?: (item: ESObject, index: number) => string
+  init: boolean = true
   pageSize: number = 10
   onLoadMore?: (pageNum: number) => void
   onRefresh?: () => void
@@ -15,8 +16,10 @@ export struct RefreshView {
   private _oTime: number = 0
 
   aboutToAppear(): void {
+    if (this.init) {
       this.onRefresh && this.onRefresh()
     }
+  }
 
   // 使用父组件@Builder装饰的方法初始化子组件@BuilderParam
   @BuilderParam customBuilderParam: (item: ESObject, index: number) => void