fix(docs): shorten TMPDIR on macOS so the dev server's vite-node socket fits

Nuxt's dev vite-node IPC uses a unix socket under $TMPDIR. macOS's default /var/folders/… tmp dir pushes the path to ~110 chars, past the ~104-char sun_path limit, so every request 500s with 'connect EINVAL'. Point $TMPDIR at /tmp on darwin (guarded; other platforms untouched) before the builder generates the socket path.

docs/nuxt.config.ts

@@ -1,5 +1,13 @@
+import { tmpdir } from 'node:os';
 import tailwindcss from '@tailwindcss/vite';
 
+// macOS dev fix: Nuxt's vite-node IPC uses a unix socket under $TMPDIR, and the
+// default macOS temp dir (/var/folders/…) pushes the socket path past the
+// ~104-char sun_path limit → `connect EINVAL` on every request. Point $TMPDIR
+// at a short directory so `nuxt dev` works. Other platforms are unaffected.
+if (process.platform === 'darwin' && tmpdir().length > 30)
+  process.env.TMPDIR = '/tmp';
+
 export default defineNuxtConfig({
   future: {
     compatibilityVersion: 4,