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/MindSpacePageEditablePreviewFrame.tsx

@@ -15,6 +15,7 @@ export function MindSpacePageEditablePreviewFrame({
   compact = false,
   fillViewport = false,
   showHint = true,
+  onFrameReady,
   onContentChange,
 }: {
   title: string;
@@ -26,6 +27,7 @@ export function MindSpacePageEditablePreviewFrame({
   compact?: boolean;
   fillViewport?: boolean;
   showHint?: boolean;
+  onFrameReady?: (iframe: HTMLIFrameElement | null) => void;
   onContentChange: (html: string) => void;
 }) {
   const scrollInsideFrame = compact || fillViewport;
@@ -99,6 +101,13 @@ export function MindSpacePageEditablePreviewFrame({
     };
   }, [maxHeight, minHeight, scrollInsideFrame, srcdoc]);
 
+  useEffect(() => {
+    onFrameReady?.(iframeRef.current);
+    return () => {
+      onFrameReady?.(null);
+    };
+  }, [onFrameReady, reloadKey, srcdoc, minHeight, maxHeight, scrollInsideFrame, compact, fillViewport]);
+
   if (previewFailed) {
     return <div className="mindspace-state mindspace-error">页面预览加载失败</div>;
   }