fix: add litter.psbailey.uk to Vite allowed hosts

- Add server.allowedHosts configuration to vite.config.js
- Allow litter.psbailey.uk and all .psbailey.uk subdomains
- Enable host: true for external access

This fixes the 'Blocked request' error when accessing from the production domain.

vite.config.js

@@ -5,6 +5,14 @@ import path from 'path'
 
 // https://vite.dev/config/
 export default defineConfig({
+  server: {
+    host: true, // Allow external access
+    allowedHosts: [
+      'localhost',
+      'litter.psbailey.uk',
+      '.psbailey.uk', // Allow all subdomains
+    ],
+  },
   plugins: [
     react(),
     VitePWA({