fix(customer): use next free id instead of stale AUTO_INCREMENT after manual id edits

Co-authored-by: Cursor <cursoragent@cursor.com>

app/Models/Customer.php

@@ -5,6 +5,7 @@ namespace App\Models;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\SoftDeletes;
+use Illuminate\Support\Facades\DB;
 use Illuminate\Support\Facades\Hash;
 use Carbon\Carbon;
 use Rooyesh\Wallet\models\Wallet;
@@ -200,6 +201,16 @@ class Customer extends Authenticatable implements JWTSubject
 
     protected static function booted(): void
     {
+        // کد کاربری = customers.id. AUTO_INCREMENT بعد از UPDATE دستی id پایین نمی‌آید
+        // (مثلاً ۱..۲۳ اصلاح شد ولی شمارنده روی ۵۵۱ ماند). همیشه اولین id خالی.
+        static::creating(function (self $customer) {
+            if (! empty($customer->id)) {
+                return;
+            }
+            $customer->id = self::nextSequentialId();
+            $customer->incrementing = false;
+        });
+
         static::saving(function (self $customer) {
             $mobile = self::normalizeMobile($customer->mobile);
             if ($mobile === null) {
@@ -211,6 +222,22 @@ class Customer extends Authenticatable implements JWTSubject
         });
     }
 
+    /** کوچک‌ترین id آزاد، شامل ردیف‌های soft-deleted تا PK تکراری نشود. */
+    public static function nextSequentialId(): int
+    {
+        $table = (new static)->getTable();
+        $row = DB::selectOne(
+            "SELECT t.id + 1 AS next_id
+             FROM (SELECT 0 AS id UNION ALL SELECT id FROM `{$table}`) t
+             LEFT JOIN `{$table}` c ON c.id = t.id + 1
+             WHERE c.id IS NULL
+             ORDER BY t.id
+             LIMIT 1"
+        );
+
+        return max(1, (int) ($row->next_id ?? 1));
+    }
+
     public static function normalizeMobile(?string $mobile): ?string
     {
         $digits = preg_replace('/\D+/', '', trim((string) $mobile));