fix: pin node 24 + bun 1.3 for railpack — node 26 broke /_global-error prerender

Co-Authored-By: Claude Code <noreply@anthropic.com>

package.json

@@ -2,6 +2,10 @@
   "name": "nextjs_tailwind_shadcn_ts",
   "version": "0.2.1",
   "private": true,
+  "engines": {
+    "node": "24.x",
+    "bun": "1.3.x"
+  },
   "scripts": {
     "dev": "next dev -p 3000",
     "dev:log": "next dev -p 3000 2>&1 | tee dev.log",