fix(build): prepare frontend workspace outputs

- Build GUI and web frontend workspace dependencies before Vite starts
- Use relative GUI asset paths for Tauri packaged resources
- Refresh caniuse-lite to remove stale Browserslist warnings

easytier-gui/vite.config.ts

@@ -33,6 +33,7 @@ const host = process.env.TAURI_DEV_HOST
 
 // https://vitejs.dev/config/
 export default defineConfig(async () => ({
+  base: './',
   resolve: {
     alias: {
       '~/': `${path.resolve(__dirname, 'src')}/`,