feat: API wali murid (Sanctum) + verifikasi admin

- Pasang laravel/sanctum, routes/api.php (prefix api/v1, 10 endpoint)
- Migrasi: parent_name di students, parent_students (pivot wali↔anak),
  parent_devices (token FCM), permission parents-verify
- Auth wali: registrasi NISN+HP (auto-verify jika HP cocok data siswa,
  pending jika tidak) + login token Sanctum
- Endpoint: me, logout, students, link anak, violations, sp-letters,
  notifications, register device
- Halaman admin Verifikasi Wali (approve/reject) + menu sidebar
- Sync kesiswaan: tarik data orang tua (student_parents) ke students
- 8 feature test baru (ParentApiTest) — total suite 39 test hijau

app/Support/PhoneHelper.php

@@ -0,0 +1,40 @@
+<?php
+
+namespace App\Support;
+
+/**
+ * Helper normalisasi nomor HP Indonesia.
+ */
+class PhoneHelper
+{
+    /**
+     * Normalisasi: buang semua non-digit, konversi 62 → 0.
+     * Contoh: "+62 812-3456-7890" → "081234567890"
+     */
+    public static function normalize(?string $phone): string
+    {
+        if ($phone === null) {
+            return '';
+        }
+        $digits = preg_replace('/\D+/', '', (string) $phone);
+        if (str_starts_with($digits, '62')) {
+            $digits = '0' . substr($digits, 2);
+        }
+        return $digits;
+    }
+
+    /**
+     * Apakah dua nomor HP merujuk ke nomor yang sama (toleran terhadap 0/62 & format)?
+     */
+    public static function matches(?string $a, ?string $b): bool
+    {
+        $na = self::normalize($a);
+        $nb = self::normalize($b);
+
+        if ($na === '' || $nb === '') {
+            return false;
+        }
+
+        return $na === $nb;
+    }
+}