Initial commit: Aplikasi Ketertiban Siswa

- Fitur: input pelanggaran, sistem poin, surat peringatan otomatis, SP progress
- Realtime notifikasi via Laravel Reverb + Echo
- Dashboard statistik, manajemen user, manajemen master data
- Login 2 kolom premium, user dropdown, pengaturan akun
- Tema biru kalem, logo sekolah dinamis, sidebar brand dinamis
- Sinkronisasi siswa dari Database Kesiswaan via API

app/Models/Classes.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class Classes extends Model
+{
+    protected $table = 'classes';
+
+    protected $fillable = [
+        'source_id', 'name', 'level', 'department_code',
+        'department_name', 'academic_year_name', 'is_active',
+        'metadata',
+    ];
+
+    protected function casts(): array
+    {
+        return [
+            'is_active' => 'boolean',
+            'metadata' => 'json',
+        ];
+    }
+
+    public function students()
+    {
+        return $this->hasMany(Student::class, 'class_id');
+    }
+}