feat: centralize create/edit flow contexts, extract edit submit service

src/Form/Model/BookingEditContext.php

@@ -0,0 +1,29 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Form\Model;
+
+use App\BusProNet\Model\BaseData;
+use App\BusProNet\Model\Booking;
+
+/**
+ * Bundles the data needed to render the booking edit flow.
+ */
+class BookingEditContext
+{
+    /**
+     * @param array<int, ParticipantCardDataDto>|null $cardsData
+     */
+    public function __construct(
+        public readonly BookingDto $bookingDto,
+        public readonly ?Booking $bookingData,
+        public readonly ?BaseData $mutableData,
+        public readonly BookingSummaryDto $summaryData,
+        public readonly ?array $cardsData = null,
+        public readonly bool $isDirty = false,
+        public readonly bool $isSubmitted = false,
+        public readonly bool $hasValidationErrors = false,
+    ) {
+    }
+}