Replace Slot ID column in lessons list with the lesson's date/time

The admin dashboard and instructor My Lessons pages showed the raw
availability-slot database ID, which is meaningless to admins and
instructors. LessonController now takes AvailabilityRepository, looks up
each lesson's slot, and renders its window as e.g.
"Jul 6, 2026 9:00 AM-10:00 AM" via mysql2date. The date is repeated on
the end time only when a slot crosses midnight, and lessons whose slot
row no longer exists show an em dash.

Closes #47

Co-Authored-By: Claude Fable 5 <[email protected]>

src/AdminMenu.php

@@ -48,7 +48,7 @@ class AdminMenu {
 
 	public function __construct( AvailabilityRepository $availability, BookingRepository $bookings, OfferingRepository $offerings, QuestionRepository $questions, PolicyRepository $policies, PolicyVersionRepository $policyVersions, PolicyService $policyService, InviteRepository $invites, EnrollmentRepository $enrollments, StudioSettings $settings, PaymentRepository $payments, PaymentService $paymentService, BillingMethodResolver $resolver ) {
 		$this->availabilityController  = new AvailabilityController( $availability, $offerings );
-		$this->lessonController        = new LessonController( $bookings, $payments );
+		$this->lessonController        = new LessonController( $bookings, $payments, $availability );
 		$this->offeringController      = new OfferingController( $offerings );
 		$this->questionController      = new QuestionController( $questions, $offerings );
 		$this->policyController        = new PolicyController( $policies, $policyVersions, $policyService );

src/Booking/LessonController.php

@@ -4,6 +4,8 @@ declare(strict_types=1);
 namespace Unsupervised\Schedular\Booking;
 
 use Unsupervised\Schedular\Auth\RoleManager;
+use Unsupervised\Schedular\Availability\AvailabilityRepository;
+use Unsupervised\Schedular\Availability\AvailabilitySlot;
 use Unsupervised\Schedular\Payment\Payment;
 use Unsupervised\Schedular\Payment\PaymentRepository;
 use Unsupervised\Schedular\Val;
@@ -13,6 +15,7 @@ class LessonController {
 	public function __construct(
 		private BookingRepository $repository,
 		private PaymentRepository $payments,
+		private AvailabilityRepository $availability,
 	) {}
 
 	public function renderAdminDashboard(): void {
@@ -83,11 +86,12 @@ class LessonController {
 		$student    = get_userdata( $lesson->studentId );
 		$instructor = get_userdata( $lesson->instructorId );
 		$payment    = null !== $lesson->paymentId ? $this->payments->findById( $lesson->paymentId ) : null;
+		$slot       = $this->availability->findById( $lesson->slotId );
 
 		return [
 			'student'            => $student ? $student->display_name : (string) $lesson->studentId,
 			'instructor'         => $instructor ? $instructor->display_name : (string) $lesson->instructorId,
-			'slot_id'            => (int) $lesson->slotId,
+			'time'               => $slot ? $this->formatSlotTime( $slot ) : '—',
 			'status'             => $lesson->status,
 			'notes'              => $lesson->notes ?? '',
 			'payment_id'         => $payment ? (int) $payment->id : 0,
@@ -101,4 +105,16 @@ class LessonController {
 			'tax_editable'       => null !== $payment && ! $payment->isPaid(),
 		];
 	}
+
+	/**
+	 * Format a slot's window as e.g. "Jul 6, 2026 9:00 AM–10:00 AM", repeating the
+	 * date on the end time only when the slot crosses midnight.
+	 */
+	private function formatSlotTime( AvailabilitySlot $slot ): string {
+		$sameDay = substr( $slot->startDt, 0, 10 ) === substr( $slot->endDt, 0, 10 );
+
+		return Val::string( mysql2date( 'M j, Y g:i A', $slot->startDt ) )
+			. '–'
+			. Val::string( mysql2date( $sameDay ? 'g:i A' : 'M j, Y g:i A', $slot->endDt ) );
+	}
 }

templates/admin/lessons.php

@@ -5,7 +5,7 @@ if (! defined('ABSPATH')) {
     exit;
 }
 
-/** @var list<array{student: string, instructor: string, slot_id: int, status: string, notes: string, payment_id: int, currency: string, amount: float, tax_rate: float, tax_amount: float, total: float, etransfer_email: string, etransfer_editable: bool, tax_editable: bool}> $rows */
+/** @var list<array{student: string, instructor: string, time: string, status: string, notes: string, payment_id: int, currency: string, amount: float, tax_rate: float, tax_amount: float, total: float, etransfer_email: string, etransfer_editable: bool, tax_editable: bool}> $rows */
 ?>
 <div class="wrap">
     <h1><?php esc_html_e('Lessons', 'unsupervised-schedular'); ?></h1>
@@ -18,7 +18,7 @@ if (! defined('ABSPATH')) {
                 <tr>
                     <th><?php esc_html_e('Student', 'unsupervised-schedular'); ?></th>
                     <th><?php esc_html_e('Instructor', 'unsupervised-schedular'); ?></th>
-                    <th><?php esc_html_e('Slot ID', 'unsupervised-schedular'); ?></th>
+                    <th><?php esc_html_e('Date/Time', 'unsupervised-schedular'); ?></th>
                     <th><?php esc_html_e('Status', 'unsupervised-schedular'); ?></th>
                     <th><?php esc_html_e('HST', 'unsupervised-schedular'); ?></th>
                     <th><?php esc_html_e('Total', 'unsupervised-schedular'); ?></th>
@@ -31,7 +31,7 @@ if (! defined('ABSPATH')) {
                     <tr>
                         <td><?php echo esc_html($row['student']); ?></td>
                         <td><?php echo esc_html($row['instructor']); ?></td>
-                        <td><?php echo esc_html((string) $row['slot_id']); ?></td>
+                        <td><?php echo esc_html($row['time']); ?></td>
                         <td><?php echo esc_html($row['status']); ?></td>
                         <td>
                             <?php if ($row['tax_editable']) : ?>

tests/Unit/Booking/LessonControllerTest.php

@@ -0,0 +1,120 @@
+<?php
+declare(strict_types=1);
+
+namespace Unsupervised\Schedular\Tests\Unit\Booking;
+
+use Brain\Monkey\Functions;
+use Mockery;
+use Unsupervised\Schedular\Availability\AvailabilityRepository;
+use Unsupervised\Schedular\Availability\AvailabilitySlot;
+use Unsupervised\Schedular\Booking\BookingRepository;
+use Unsupervised\Schedular\Booking\Lesson;
+use Unsupervised\Schedular\Booking\LessonController;
+use Unsupervised\Schedular\Payment\PaymentRepository;
+use Unsupervised\Schedular\Tests\Unit\TestCase;
+
+class LessonControllerTest extends TestCase
+{
+    private BookingRepository&Mockery\MockInterface $bookings;
+    private PaymentRepository&Mockery\MockInterface $payments;
+    private AvailabilityRepository&Mockery\MockInterface $availability;
+    private LessonController $controller;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        $this->bookings     = Mockery::mock(BookingRepository::class);
+        $this->payments     = Mockery::mock(PaymentRepository::class);
+        $this->availability = Mockery::mock(AvailabilityRepository::class);
+        $this->controller   = new LessonController($this->bookings, $this->payments, $this->availability);
+
+        $_POST = [];
+
+        Functions\when('current_user_can')->justReturn(true);
+        Functions\when('get_userdata')->justReturn(false);
+        Functions\when('mysql2date')->alias(
+            static fn (string $format, string $date) => date($format, (int) strtotime($date))
+        );
+    }
+
+    public function testAdminDashboardShowsSlotDateTimeInsteadOfSlotId(): void
+    {
+        $lesson = new Lesson(slotId: 10, studentId: 5, instructorId: 3, id: 1);
+        $slot   = new AvailabilitySlot(
+            instructorId: 3,
+            startDt: '2026-07-06 09:00:00',
+            endDt: '2026-07-06 10:00:00',
+            id: 10
+        );
+
+        $this->bookings->shouldReceive('findAllUpcoming')->once()->andReturn([$lesson]);
+        $this->availability->shouldReceive('findById')->once()->with(10)->andReturn($slot);
+
+        $html = $this->render();
+
+        self::assertStringContainsString('Jul 6, 2026 9:00 AM–10:00 AM', $html);
+        self::assertStringContainsString('Date/Time', $html);
+        self::assertStringNotContainsString('Slot ID', $html);
+    }
+
+    public function testSlotCrossingMidnightRepeatsTheDateOnTheEndTime(): void
+    {
+        $lesson = new Lesson(slotId: 11, studentId: 5, instructorId: 3, id: 2);
+        $slot   = new AvailabilitySlot(
+            instructorId: 3,
+            startDt: '2026-07-06 23:00:00',
+            endDt: '2026-07-07 00:30:00',
+            id: 11
+        );
+
+        $this->bookings->shouldReceive('findAllUpcoming')->once()->andReturn([$lesson]);
+        $this->availability->shouldReceive('findById')->once()->with(11)->andReturn($slot);
+
+        $html = $this->render();
+
+        self::assertStringContainsString('Jul 6, 2026 11:00 PM–Jul 7, 2026 12:30 AM', $html);
+    }
+
+    public function testMissingSlotRendersDash(): void
+    {
+        $lesson = new Lesson(slotId: 99, studentId: 5, instructorId: 3, id: 3);
+
+        $this->bookings->shouldReceive('findAllUpcoming')->once()->andReturn([$lesson]);
+        $this->availability->shouldReceive('findById')->once()->with(99)->andReturn(null);
+
+        $html = $this->render();
+
+        self::assertStringContainsString('—', $html);
+    }
+
+    public function testInstructorLessonsShowSlotDateTime(): void
+    {
+        Functions\when('get_current_user_id')->justReturn(3);
+
+        $lesson = new Lesson(slotId: 12, studentId: 5, instructorId: 3, id: 4);
+        $slot   = new AvailabilitySlot(
+            instructorId: 3,
+            startDt: '2026-08-01 14:00:00',
+            endDt: '2026-08-01 15:00:00',
+            id: 12
+        );
+
+        $this->bookings->shouldReceive('findUpcomingForInstructor')->once()->with(3)->andReturn([$lesson]);
+        $this->availability->shouldReceive('findById')->once()->with(12)->andReturn($slot);
+
+        ob_start();
+        $this->controller->renderInstructorLessons();
+        $html = (string) ob_get_clean();
+
+        self::assertStringContainsString('Aug 1, 2026 2:00 PM–3:00 PM', $html);
+    }
+
+    private function render(): string
+    {
+        ob_start();
+        $this->controller->renderAdminDashboard();
+
+        return (string) ob_get_clean();
+    }
+}