Initial TrueGrowth source import

packages/react-text/src/search-highlight.ts

@@ -0,0 +1,27 @@
+import { useSyncExternalStore } from 'react';
+
+let searchQuery = '';
+const listeners = new Set<() => void>();
+
+function subscribe(listener: () => void) {
+  listeners.add(listener);
+  return () => {
+    listeners.delete(listener);
+  };
+}
+
+function getSnapshot() {
+  return searchQuery;
+}
+
+/** 设置搜索高亮关键词（供搜索组件调用） */
+export function setSearchHighlightQuery(query: string) {
+  if (searchQuery === query) return;
+  searchQuery = query;
+  listeners.forEach((listener) => listener());
+}
+
+/** 订阅搜索高亮关键词（供 Text 组件内部使用） */
+export function useSearchHighlightQuery(): string {
+  return useSyncExternalStore(subscribe, getSnapshot, getSnapshot);
+}