fix: allow booking the free part of a partly booked day

tests/Controller/BookingControllerTest.php

@@ -210,6 +210,56 @@ class BookingControllerTest extends WebTestCase
         self::assertCount(1, $crawler->filter(\sprintf('[hx-get="/bookings/%d/edit"]', $booking->getId())));
     }
 
+    /**
+     * The reported bug, end to end: one person holds 09:00-13:00, a second opens the board on
+     * its default all-day span, and must be able to take the rest of the day.
+     *
+     * The plan used to render that desk exactly like a fully booked one and give it no hx-get at
+     * all, so the second person could not reach the modal unless they happened to narrow the
+     * span by hand first.
+     */
+    public function testASecondPersonCanBookTheRestOfADayFromTheDefaultBoard(): void
+    {
+        $desk = $this->resource('D1', svgElementId: 'desk-01');
+        $this->em->persist(new Booking($this->user('[email protected]'), $desk, new \DateTimeImmutable('2026-10-01'), TimeRange::fromMinutes(540, 780)));
+        $this->em->flush();
+
+        $this->client->loginUser($this->user('[email protected]'));
+
+        // 1. The shape is clickable on the all-day board.
+        $crawler = $this->client->request('GET', '/book/desk?date=2026-10-01');
+        $opener = $crawler->filter(\sprintf('g[hx-get*="/bookings/new/%d/"]', $desk->getId()));
+        self::assertCount(1, $opener, 'a partly booked desk must still open the booking modal');
+
+        // 2. The modal it opens is prefilled with a window that is actually free.
+        $modal = $this->client->request('GET', $opener->attr('hx-get'), server: ['HTTP_HX-Request' => 'true']);
+        self::assertSame('13:00', $modal->filter('#booking_startTime')->attr('value'));
+        // Blank, not 24:00 -- <input type="time"> cannot hold it, and blank already means
+        // "to the end of the day" here just as it does on the board's span picker.
+        self::assertNull($modal->filter('#booking_endTime')->attr('value'));
+
+        // 3. Submitting it works.
+        $response = $this->submitBookingModal($desk, '2026-10-01', [
+            'startTime' => '13:00',
+            'endTime' => '17:00',
+        ]);
+
+        self::assertSame(Response::HTTP_OK, $response->getStatusCode());
+        self::assertCount(2, $this->em->getRepository(Booking::class)->findBy(['resource' => $desk]));
+    }
+
+    public function testAFullyBookedDeskIsNotClickable(): void
+    {
+        $desk = $this->resource('D1', svgElementId: 'desk-01');
+        $this->em->persist(new Booking($this->user('[email protected]'), $desk, new \DateTimeImmutable('2026-10-01')));
+        $this->em->flush();
+
+        $this->client->loginUser($this->user('[email protected]'));
+        $crawler = $this->client->request('GET', '/book/desk?date=2026-10-01');
+
+        self::assertCount(0, $crawler->filter(\sprintf('g[hx-get*="/bookings/new/%d/"]', $desk->getId())));
+    }
+
     public function testBookingPartOfADay(): void
     {
         $this->client->loginUser($this->user('[email protected]'));