feat(iframe-bridge): implement iframe communication bridge and language sync

src/iframe/bridgeManager.ts

@@ -0,0 +1,23 @@
+import type { ChildApi } from '@teres/iframe-bridge';
+import logger from '@/utils/logger';
+
+let childPromise: Promise<ChildApi> | null = null;
+
+export function setChildPromise(promise: Promise<ChildApi>) {
+  childPromise = promise;
+}
+
+export function clearChildPromise() {
+  childPromise = null;
+}
+
+export async function changeChildLanguage(lng: string) {
+  if (!childPromise) return;
+  try {
+    const child = await childPromise;
+    // @ts-ignore
+    await child?.changeLanguage?.(lng);
+  } catch (err) {
+    logger.warn('changeChildLanguage failed', err);
+  }
+}