Allow all hosts for Vite dev server

Enables access via hostnames like dwg.local on local network

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/vite.config.ts

@@ -12,6 +12,7 @@ export default defineConfig({
   },
   server: {
     port: parseInt(process.env.PORT || '5173'),
+    allowedHosts: true, // Allow all hosts for local network development
     proxy: {
       // WebSocket endpoints
       '/ws': {