fix(rsc): pre-include React peers in client env optimizeDeps

The client environment only had `react-dom/client` and the React
Server DOM browser entry in `optimizeDeps.include`. React itself
and crawled React-peer packages were discovered lazily as the
browser requested modules, which re-runs the optimizer mid-load
and changes the `?v=` hash on already-served chunks. The browser
ends up with two distinct React module records, and `'use client'`
libraries that synchronously call hooks in providers hit the wrong
dispatcher (`React.H` is null), throwing `Invalid hook call`.

Mirror the SSR/RSC env behaviour by including `react`,
`react-dom`, `react/jsx-runtime`, `react/jsx-dev-runtime`, plus
the React-peer packages from `crawlFrameworkPkgs`. Filter that
list to packages with a client-resolvable entry so server-only
React peers (e.g. `@vitejs/test-dep-client-in-server`) don't
break dep optimization.

Author: jgeurts

packages/plugin-rsc/src/plugin.ts

@@ -111,6 +111,20 @@ function resolvePackage(name: string) {
   return pathToFileURL(require.resolve(name)).href
 }
 
+function filterClientResolvable(packages: string[]): string[] {
+  return packages.filter((name) => {
+    try {
+      const pkgJson = require(`${name}/package.json`)
+      if (pkgJson.exports && typeof pkgJson.exports === 'object') {
+        return '.' in pkgJson.exports
+      }
+      return Boolean(pkgJson.exports || pkgJson.main || pkgJson.module)
+    } catch {
+      return false
+    }
+  })
+}
+
 export type { RscPluginManager }
 
 /**
@@ -517,8 +531,17 @@ export default function vitePluginRsc(
               },
               optimizeDeps: {
                 include: [
+                  'react',
+                  'react-dom',
+                  'react/jsx-runtime',
+                  'react/jsx-dev-runtime',
                   'react-dom/client',
                   `${reactServerDomPackageName}/client.browser`,
+                  // Pre-discover React-peer packages with a client-resolvable
+                  // entry. Without this, the client optimizer re-scans as
+                  // boundaries are discovered and emits multiple `?v=` hashes
+                  // on cold start, duplicating React in the browser.
+                  ...filterClientResolvable(result.ssr.noExternal),
                 ],
                 exclude: [PKG_NAME],
               },