Add TKMind platform extensions, H5/MindSpace stack, and deployment tooling.

Fork goose with custom MCP widgets, platform extensions (aider, git, web, search),
MindSpace H5 backend/frontend, Plaza/Ops UIs, and deploy scripts for tkmind.cn.

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

ui/plaza/components/post/PostEmbed.tsx

@@ -0,0 +1,33 @@
+'use client';
+
+import { useEffect, useRef, useState } from 'react';
+
+export function PostEmbed({ src, title }: { src: string; title: string }) {
+  const iframeRef = useRef<HTMLIFrameElement>(null);
+  const [height, setHeight] = useState(480);
+
+  useEffect(() => {
+    const onMessage = (event: MessageEvent) => {
+      if (event.source !== iframeRef.current?.contentWindow) return;
+      const data = event.data;
+      if (data && typeof data === 'object' && data.type === 'plaza:embed-height') {
+        const next = Number(data.height);
+        if (Number.isFinite(next) && next > 0) setHeight(Math.min(next, 4000));
+      }
+    };
+    window.addEventListener('message', onMessage);
+    return () => window.removeEventListener('message', onMessage);
+  }, []);
+
+  return (
+    <iframe
+      ref={iframeRef}
+      src={src}
+      title={title}
+      sandbox="allow-scripts allow-same-origin"
+      className="w-full rounded-2xl border border-[#d6d0c3] bg-white"
+      style={{ height }}
+      loading="lazy"
+    />
+  );
+}