fix(zitare): add missing Tailwind CSS v4 vite plugin

The @tailwindcss/vite plugin was not registered, causing all Tailwind
styles to be ignored in the web app.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/zitare/apps/web/vite.config.ts

@@ -1,4 +1,5 @@
 import { sveltekit } from '@sveltejs/kit/vite';
+import tailwindcss from '@tailwindcss/vite';
 import { defineConfig } from 'vite';
 import { SvelteKitPWA } from '@vite-pwa/sveltekit';
 import { createPWAConfig } from '@manacore/shared-pwa';
@@ -6,6 +7,7 @@ import { MANACORE_SHARED_PACKAGES, getBuildDefines } from '@manacore/shared-vite
 
 export default defineConfig({
 	plugins: [
+		tailwindcss(),
 		sveltekit(),
 		SvelteKitPWA(
 			createPWAConfig({