Improve WeChat MP replies and ship MindSpace/H5 production updates.

Add WeChat service account routing with sync acks, connectivity tests, and context isolation; document deploy runbooks; and bundle related MindSpace, voice, Plaza, and server gateway changes for production rollout.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/components/MindSpacePageDraftPreviewFrame.tsx

@@ -21,6 +21,7 @@ export function MindSpacePageDraftPreviewFrame({
   maxHeight = 12000,
   className = 'mindspace-page-preview-frame',
   changeHighlight = null,
+  onFrameReady,
 }: {
   pageId: string;
   title: string;
@@ -33,6 +34,7 @@ export function MindSpacePageDraftPreviewFrame({
   maxHeight?: number;
   className?: string;
   changeHighlight?: MindSpacePreviewChangeHighlight | null;
+  onFrameReady?: (iframe: HTMLIFrameElement | null) => void;
 }) {
   const iframeRef = useRef<HTMLIFrameElement>(null);
   const [srcdoc, setSrcdoc] = useState('');
@@ -73,6 +75,13 @@ export function MindSpacePageDraftPreviewFrame({
     setHeight(minHeight);
   }, [srcdoc, reloadKey, minHeight]);
 
+  useEffect(() => {
+    onFrameReady?.(iframeRef.current);
+    return () => {
+      onFrameReady?.(null);
+    };
+  }, [onFrameReady, srcdoc, reloadKey]);
+
   useEffect(() => {
     const iframe = iframeRef.current;
     if (!iframe || !srcdoc) return;