feat: realtime notifications, fix broadcasting, add notifications page

- Fix: broadcasting.php config (was missing, broadcast failed)
- Fix: Echo class global scope (window.EchoClass)
- Fix: Nginx WebSocket proxy for Reverb
- Fix: Firewall port 8087 opened
- Fix: Duplicate event listener cleanup
- Fix: Mark as read functionality
- Add: CreateViolationNotification listener
- Add: Notifications index page with pagination
- Add: Timezone Asia/Jakarta support
- Add: Real-time badge across all pages
- Remove: toOthers() so recorder also gets notification
- Update: .env.example with new variables

resources/views/dashboard/index.blade.php

@@ -3,7 +3,7 @@
 @section('title', 'Dashboard')
 
 @section('content')
-<div x-data="notifications()">
+<div>
     <div class="mb-6">
         <h1 class="text-2xl font-bold text-gray-900">Dashboard</h1>
         <p class="text-sm text-gray-500">Ringkasan pelanggaran siswa</p>