fix: bundle SDK+zod in react-with-deps (was byte-identical to ./react)

[ochafik]

Problem

Copy-paste bug from PR #221 (commit e078250a, 2026-01-09). That PR added app-with-deps and react-with-deps as siblings for CDN/import-map no-bundler consumption. But the react-with-deps external array was duplicated from the regular ./react entry without dropping @modelcontextprotocol/sdk — so it never actually bundled anything extra.

Result: react-with-deps.js has shipped byte-identical to react/index.js for 10 releases (v0.3.1 → v1.2.0). Same MD5, same bytes. After #534 (zod externalized via PEER_EXTERNALS), both entries used ["react", "react-dom", ...PEER_EXTERNALS] — still identical.

Fix

Drop ...PEER_EXTERNALS from the react-with-deps external array so it mirrors app-with-deps: bundle @modelcontextprotocol/sdk + zod, keep only React external.

   buildJs("src/react/index.tsx", {
     outdir: "dist/src/react",
-    external: ["react", "react-dom", ...PEER_EXTERNALS],
+    external: ["react", "react-dom"],
     naming: { entry: "react-with-deps.js" },
   }),

React and react-dom MUST stay external — bundling them would cause dual-React-instance hooks errors (Invalid hook call). The consumer provides React via an import map (esm.sh, unpkg, etc.).

Use case

ESM-from-CDN React apps using import maps — no npm, no bundler:

<script type="importmap">
{
  "imports": {
    "react": "https://esm.sh/react@19",
    "react-dom": "https://esm.sh/react-dom@19",
    "react-dom/client": "https://esm.sh/react-dom@19/client"
  }
}
</script>
<script type="module">
  import { useApp } from "https://unpkg.com/@modelcontextprotocol/ext-apps/dist/src/react/react-with-deps.js";
  // SDK + zod bundled — no need to map them
</script>

Verification

	index.js (./react)	react-with-deps.js
Size	26,153 B	323,420 B
MD5	852ae4b6...	fb54392b...
from"@modelcontextprotocol/sdk"	1 (external)	0 (bundled)
from"zod"	1 (external)	0 (bundled)
from"react"	2 (external)	2 (still external ✓)

Module smoke test: node -e "import(...)" → parses cleanly, exports useApp, useAutoResize, useDocumentTheme, useHostStyles, App, PostMessageTransport, all Zod schemas.

Net diff vs main

One line in build.bun.ts. package.json unchanged.

[pkg-pr-new]

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commit: 9991467