feat: name the accommodation booking PDF after its record label

src/Service/AccommodationBookingPdfGenerator.php

@@ -93,7 +93,7 @@ class AccommodationBookingPdfGenerator
         $parts = array_filter([
             $booking->getDateFrom()?->format('Y-m-d'),
             $booking->getAccommodation()?->getCalendarCode(),
-            'Buchung',
+            $booking->recordLabel(),
         ]);
 
         return implode(' ', $parts).'.pdf';

tests/Service/AccommodationBookingPdfGeneratorTest.php

@@ -68,17 +68,16 @@ class AccommodationBookingPdfGeneratorTest extends TestCase
         self::assertStringContainsString('2026-07-06 BERGBLICK Buchung.pdf', (string) $response->headers->get('Content-Disposition'));
     }
 
-    public function testADocumentForAnUnacceptedOfferKeepsTheSameFilename(): void
+    public function testADocumentForAnUnacceptedOfferIsNamedAsAnOffer(): void
     {
-        // 'Buchung' in the filename is a literal, not the record label: the office files
-        // these documents by date and house, and a second spelling would break that order.
+        // The filename follows the record label, like the document's heading.
         $booking = $this->booking();
         $booking->setAcceptedAt(null);
         $booking->setConfirmedAt(null);
 
         $response = $this->createGenerator($this->breakdown())->createDownloadResponse($booking);
 
-        self::assertStringContainsString('2026-07-06 BERGBLICK Buchung.pdf', (string) $response->headers->get('Content-Disposition'));
+        self::assertStringContainsString('2026-07-06 BERGBLICK Angebot.pdf', (string) $response->headers->get('Content-Disposition'));
     }
 
     public function testABookingWithoutPricesCannotBeRendered(): void