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/SpThreshold.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class SpThreshold extends Model
+{
+    protected $fillable = [
+        'name', 'slug', 'min_points', 'max_points',
+        'color', 'default_description', 'is_active',
+    ];
+
+    protected function casts(): array
+    {
+        return [
+            'min_points' => 'integer',
+            'max_points' => 'integer',
+            'is_active' => 'boolean',
+        ];
+    }
+
+    public function spLetters()
+    {
+        return $this->hasMany(SpLetter::class, 'sp_threshold_id');
+    }
+}