feat(appointment): enhance booking window functionality with day/week/month options and update defaults

src/Appointment/Entity/WeeklySchedule.php

@@ -27,9 +27,12 @@ class WeeklySchedule
     public const MODE_SLOT    = 'slot';    // نوبت‌دهی اسلاتی (رفتار پیش‌فرض)
     public const MODE_SERVICE = 'service'; // نوبت‌دهی بر اساس مدت سرویس
 
+    /** واحدهای مجاز بازهٔ رزرو آنلاین؛ همان کلیدواژه‌های strtotime. */
+    public const BOOKING_WINDOW_UNITS = ['day', 'week', 'month'];
+
     public const DEFAULT_META = [
         'online_booking_enabled' => true,
-        'booking_window_value'   => 1,
+        'booking_window_value'   => 3,
         'booking_window_unit'    => 'month',
         'booking_mode'           => self::MODE_SLOT,
         'buffer_minutes'         => 0,
@@ -128,7 +131,7 @@ class WeeklySchedule
         $this->setting[self::META_KEY] = [
             'online_booking_enabled' => (bool)($meta['online_booking_enabled'] ?? $current['online_booking_enabled']),
             'booking_window_value'   => max(1, (int)($meta['booking_window_value'] ?? $current['booking_window_value'])),
-            'booking_window_unit'    => in_array($meta['booking_window_unit'] ?? null, ['week', 'month'], true)
+            'booking_window_unit'    => in_array($meta['booking_window_unit'] ?? null, self::BOOKING_WINDOW_UNITS, true)
                 ? $meta['booking_window_unit']
                 : $current['booking_window_unit'],
             'booking_mode'           => in_array($meta['booking_mode'] ?? null, [self::MODE_SLOT, self::MODE_SERVICE], true)