Add group-class scheduling, instructor assignment, and details/invite management

Group classes now carry a specific class time (alongside date and duration)
and an assigned instructor:

- Schema: add `class_time` (TIME) to `us_offerings`; `Offering` gains
  `normalizeTime`/`sessionWindows`. (Rides the pending 1.0.0->1.1.0 dbDelta
  upgrade, so no version bump.)
- Offering form: class-time field, plus a studio-admin instructor picker
  (plain instructors always own their own classes).
- `ClassSlotReconciler`: assigning an instructor clears their open booking
  slots overlapping each session and flags already-booked lessons that clash
  (a booked lesson is never deleted). Uses new
  `AvailabilityRepository::findOverlapping`.
- Front end: `GET /offerings` exposes `instructor_name`; the enrolment page
  shows who teaches each class and when it meets.

Back-office group-class views redesigned:

- Instructor **My Group Classes** and studio-admin **Group Classes** are now
  per-class summaries with enrolment counts, not flat student lists.
- Each links through (`?class_id=<id>`) to a per-class **details page**
  (schedule panel, roster with payment status, and — for invite-only classes
  — the add/make-available/invite-by-email controls). Invite-only membership
  is managed entirely from this page.
- Invite actions are allowed for the class's owning instructor or any
  `view_all_lessons` studio admin, so an owner-operator (studio admin who also
  teaches) can reach every class's roster and invites from the Group Classes
  page.

Tests: composer test (508), composer lint, composer cs all pass.

Co-Authored-By: Claude Opus 4.8 <[email protected]>

templates/admin/group-classes.php

@@ -5,29 +5,56 @@ if (! defined('ABSPATH')) {
     exit;
 }
 
-/** @var list<array{student: string, offering: string, status: string}> $rows */
+/**
+ * @var list<array{id: int|null, title: string, instructor: string, when: string, capacity: int|null, enrolled: int, invite_only: bool}> $rows
+ * @var string $notice
+ * @var string $baseUrl
+ */
 ?>
 <div class="wrap">
     <h1><?php esc_html_e('Group Classes', 'unsupervised-schedular'); ?></h1>
-    <p class="description"><?php esc_html_e('Active enrolments across all group classes.', 'unsupervised-schedular'); ?></p>
+    <p class="description"><?php esc_html_e('Every group class across instructors. Select one for its details, roster, and — for invite-only classes — to invite or add students.', 'unsupervised-schedular'); ?></p>
+
+    <?php if ('' !== $notice) : ?>
+        <div class="notice notice-info is-dismissible"><p><?php echo esc_html($notice); ?></p></div>
+    <?php endif; ?>
 
     <?php if (empty($rows)) : ?>
-        <p><?php esc_html_e('No active enrolments.', 'unsupervised-schedular'); ?></p>
+        <p><?php esc_html_e('No group classes.', 'unsupervised-schedular'); ?></p>
     <?php else : ?>
         <table class="wp-list-table widefat fixed striped">
             <thead>
                 <tr>
-                    <th><?php esc_html_e('Student', 'unsupervised-schedular'); ?></th>
                     <th><?php esc_html_e('Class', 'unsupervised-schedular'); ?></th>
-                    <th><?php esc_html_e('Status', 'unsupervised-schedular'); ?></th>
+                    <th><?php esc_html_e('Instructor', 'unsupervised-schedular'); ?></th>
+                    <th><?php esc_html_e('When', 'unsupervised-schedular'); ?></th>
+                    <th><?php esc_html_e('Enrolled', 'unsupervised-schedular'); ?></th>
+                    <th><?php esc_html_e('Actions', 'unsupervised-schedular'); ?></th>
                 </tr>
             </thead>
             <tbody>
                 <?php foreach ($rows as $row) : ?>
                     <tr>
-                        <td><?php echo esc_html($row['student']); ?></td>
-                        <td><?php echo esc_html($row['offering']); ?></td>
-                        <td><?php echo esc_html($row['status']); ?></td>
+                        <td>
+                            <?php echo esc_html($row['title']); ?>
+                            <?php if ($row['invite_only']) : ?>
+                                <span class="dashicons dashicons-lock" title="<?php esc_attr_e('Invite only', 'unsupervised-schedular'); ?>"></span>
+                            <?php endif; ?>
+                        </td>
+                        <td><?php echo esc_html($row['instructor']); ?></td>
+                        <td><?php echo '' !== $row['when'] ? esc_html($row['when']) : '&mdash;'; ?></td>
+                        <td>
+                            <?php
+                            if (null === $row['capacity']) {
+                                echo esc_html((string) $row['enrolled']);
+                            } else {
+                                echo esc_html($row['enrolled'] . ' / ' . $row['capacity']);
+                            }
+                            ?>
+                        </td>
+                        <td>
+                            <a class="button button-small" href="<?php echo esc_url(add_query_arg('class_id', (int) $row['id'], $baseUrl)); ?>"><?php echo $row['invite_only'] ? esc_html__('View & invite', 'unsupervised-schedular') : esc_html__('View details', 'unsupervised-schedular'); ?></a>
+                        </td>
                     </tr>
                 <?php endforeach; ?>
             </tbody>

templates/admin/my-group-class-detail.php

@@ -0,0 +1,189 @@
+<?php
+declare(strict_types=1);
+
+if (! defined('ABSPATH')) {
+    exit;
+}
+
+/**
+ * @var array{id: int|null, title: string, when: string, capacity: int|null, enrolled: int, invite_only: bool, instructor: string, price: float, currency: string, duration: int|null, description: string|null, schedule_note: string|null, active: bool, roster: list<array{student: string, status: string, payment: string|null}>, invited: list<array{who: string, kind: string}>} $class
+ * @var list<array{id: int, name: string}> $students
+ * @var string $notice
+ * @var string $baseUrl
+ */
+?>
+<div class="wrap">
+    <h1>
+        <?php echo esc_html($class['title']); ?>
+        <?php if ($class['invite_only']) : ?>
+            <span class="dashicons dashicons-lock" title="<?php esc_attr_e('Invite only', 'unsupervised-schedular'); ?>"></span>
+        <?php endif; ?>
+    </h1>
+
+    <p>
+        <a href="<?php echo esc_url($baseUrl); ?>">&larr; <?php esc_html_e('Back to my group classes', 'unsupervised-schedular'); ?></a>
+    </p>
+
+    <?php if ('' !== $notice) : ?>
+        <div class="notice notice-info is-dismissible"><p><?php echo esc_html($notice); ?></p></div>
+    <?php endif; ?>
+
+    <h2><?php esc_html_e('Class details', 'unsupervised-schedular'); ?></h2>
+    <table class="widefat striped" style="max-width:40em;">
+        <tbody>
+            <tr>
+                <th scope="row"><?php esc_html_e('When', 'unsupervised-schedular'); ?></th>
+                <td><?php echo '' !== $class['when'] ? esc_html($class['when']) : '&mdash;'; ?></td>
+            </tr>
+            <tr>
+                <th scope="row"><?php esc_html_e('Instructor', 'unsupervised-schedular'); ?></th>
+                <td><?php echo esc_html($class['instructor']); ?></td>
+            </tr>
+            <tr>
+                <th scope="row"><?php esc_html_e('Enrolled', 'unsupervised-schedular'); ?></th>
+                <td>
+                    <?php
+                    if (null === $class['capacity']) {
+                        printf(
+                            /* translators: %d: number of enrolled students. */
+                            esc_html__('%d enrolled', 'unsupervised-schedular'),
+                            (int) $class['enrolled']
+                        );
+                    } else {
+                        printf(
+                            /* translators: 1: number of enrolled students, 2: class capacity. */
+                            esc_html__('%1$d / %2$d enrolled', 'unsupervised-schedular'),
+                            (int) $class['enrolled'],
+                            (int) $class['capacity']
+                        );
+                    }
+                    ?>
+                </td>
+            </tr>
+            <?php if (null !== $class['duration']) : ?>
+                <tr>
+                    <th scope="row"><?php esc_html_e('Duration', 'unsupervised-schedular'); ?></th>
+                    <td>
+                        <?php
+                        printf(
+                            /* translators: %d: session length in minutes. */
+                            esc_html__('%d min', 'unsupervised-schedular'),
+                            (int) $class['duration']
+                        );
+                        ?>
+                    </td>
+                </tr>
+            <?php endif; ?>
+            <tr>
+                <th scope="row"><?php esc_html_e('Price', 'unsupervised-schedular'); ?></th>
+                <td><?php echo esc_html(number_format($class['price'], 2) . ' ' . $class['currency']); ?></td>
+            </tr>
+            <?php if (null !== $class['schedule_note'] && '' !== $class['schedule_note']) : ?>
+                <tr>
+                    <th scope="row"><?php esc_html_e('Schedule note', 'unsupervised-schedular'); ?></th>
+                    <td><?php echo esc_html($class['schedule_note']); ?></td>
+                </tr>
+            <?php endif; ?>
+            <?php if (null !== $class['description'] && '' !== $class['description']) : ?>
+                <tr>
+                    <th scope="row"><?php esc_html_e('Description', 'unsupervised-schedular'); ?></th>
+                    <td><?php echo esc_html($class['description']); ?></td>
+                </tr>
+            <?php endif; ?>
+            <tr>
+                <th scope="row"><?php esc_html_e('Status', 'unsupervised-schedular'); ?></th>
+                <td>
+                    <?php if ($class['active']) : ?>
+                        <?php esc_html_e('Open for registration', 'unsupervised-schedular'); ?>
+                    <?php else : ?>
+                        <?php esc_html_e('Closed', 'unsupervised-schedular'); ?>
+                    <?php endif; ?>
+                    <?php if ($class['invite_only']) : ?>
+                        &middot; <?php esc_html_e('Invite only', 'unsupervised-schedular'); ?>
+                    <?php endif; ?>
+                </td>
+            </tr>
+        </tbody>
+    </table>
+
+    <h2><?php esc_html_e('Enrolled students', 'unsupervised-schedular'); ?></h2>
+    <?php if (empty($class['roster'])) : ?>
+        <p><?php esc_html_e('No enrolments yet.', 'unsupervised-schedular'); ?></p>
+    <?php else : ?>
+        <table class="wp-list-table widefat fixed striped">
+            <thead>
+                <tr>
+                    <th><?php esc_html_e('Student', 'unsupervised-schedular'); ?></th>
+                    <th><?php esc_html_e('Enrolment', 'unsupervised-schedular'); ?></th>
+                    <th><?php esc_html_e('Payment', 'unsupervised-schedular'); ?></th>
+                </tr>
+            </thead>
+            <tbody>
+                <?php foreach ($class['roster'] as $entry) : ?>
+                    <tr>
+                        <td><?php echo esc_html($entry['student']); ?></td>
+                        <td><?php echo esc_html($entry['status']); ?></td>
+                        <td><?php echo esc_html($entry['payment'] ?? '—'); ?></td>
+                    </tr>
+                <?php endforeach; ?>
+            </tbody>
+        </table>
+    <?php endif; ?>
+
+    <?php if ($class['invite_only']) : ?>
+        <h2><?php esc_html_e('Invite &amp; enrol students', 'unsupervised-schedular'); ?></h2>
+        <p class="description"><?php esc_html_e('This class is invite only, so students join only when you add or invite them here.', 'unsupervised-schedular'); ?></p>
+
+        <?php if (! empty($class['invited'])) : ?>
+            <h3><?php esc_html_e('Invited (not yet enrolled)', 'unsupervised-schedular'); ?></h3>
+            <ul class="ul-disc">
+                <?php foreach ($class['invited'] as $invitee) : ?>
+                    <li><?php echo esc_html($invitee['who'] . ' — ' . $invitee['kind']); ?></li>
+                <?php endforeach; ?>
+            </ul>
+        <?php endif; ?>
+
+        <div class="us-group-invite-controls" style="display:flex; flex-wrap:wrap; gap:2em; margin:1em 0 2em;">
+            <form method="post">
+                <?php wp_nonce_field('usc_group_action'); ?>
+                <input type="hidden" name="offering_id" value="<?php echo esc_attr((string) $class['id']); ?>">
+                <h4><?php esc_html_e('Add students directly', 'unsupervised-schedular'); ?></h4>
+                <p class="description"><?php esc_html_e('Enrols them now with a pending payment.', 'unsupervised-schedular'); ?></p>
+                <select name="student_ids[]" multiple size="5" style="min-width:16em;">
+                    <?php foreach ($students as $student) : ?>
+                        <option value="<?php echo esc_attr((string) $student['id']); ?>"><?php echo esc_html($student['name']); ?></option>
+                    <?php endforeach; ?>
+                </select>
+                <p>
+                    <button type="submit" name="usc_action" value="add_direct" class="button"><?php esc_html_e('Add to class', 'unsupervised-schedular'); ?></button>
+                </p>
+            </form>
+
+            <form method="post">
+                <?php wp_nonce_field('usc_group_action'); ?>
+                <input type="hidden" name="offering_id" value="<?php echo esc_attr((string) $class['id']); ?>">
+                <h4><?php esc_html_e('Make available to students', 'unsupervised-schedular'); ?></h4>
+                <p class="description"><?php esc_html_e('Grants access so they can enrol themselves.', 'unsupervised-schedular'); ?></p>
+                <select name="student_ids[]" multiple size="5" style="min-width:16em;">
+                    <?php foreach ($students as $student) : ?>
+                        <option value="<?php echo esc_attr((string) $student['id']); ?>"><?php echo esc_html($student['name']); ?></option>
+                    <?php endforeach; ?>
+                </select>
+                <p>
+                    <button type="submit" name="usc_action" value="grant_access" class="button"><?php esc_html_e('Grant access', 'unsupervised-schedular'); ?></button>
+                </p>
+            </form>
+
+            <form method="post">
+                <?php wp_nonce_field('usc_group_action'); ?>
+                <input type="hidden" name="offering_id" value="<?php echo esc_attr((string) $class['id']); ?>">
+                <h4><?php esc_html_e('Invite by email', 'unsupervised-schedular'); ?></h4>
+                <p class="description"><?php esc_html_e('For someone without an account yet.', 'unsupervised-schedular'); ?></p>
+                <input type="email" name="email" class="regular-text" placeholder="<?php esc_attr_e('[email protected]', 'unsupervised-schedular'); ?>">
+                <p>
+                    <button type="submit" name="usc_action" value="invite_email" class="button"><?php esc_html_e('Send invite', 'unsupervised-schedular'); ?></button>
+                </p>
+            </form>
+        </div>
+    <?php endif; ?>
+</div>

templates/admin/my-group-classes.php

@@ -6,14 +6,14 @@ if (! defined('ABSPATH')) {
 }
 
 /**
- * @var list<array{id: int|null, title: string, capacity: int|null, enrolled: int, invite_only: bool, roster: list<array{student: string, status: string, payment: string|null}>, invited: list<array{who: string, kind: string}>}> $classes
- * @var list<array{id: int, name: string}> $students
+ * @var list<array{id: int|null, title: string, when: string, capacity: int|null, enrolled: int, invite_only: bool}> $classes
  * @var string $notice
+ * @var string $baseUrl
  */
 ?>
 <div class="wrap">
     <h1><?php esc_html_e('My Group Classes', 'unsupervised-schedular'); ?></h1>
-    <p class="description"><?php esc_html_e('Your group classes and their rosters.', 'unsupervised-schedular'); ?></p>
+    <p class="description"><?php esc_html_e('Your group classes. Select one for its details, roster, and — for invite-only classes — to invite or add students.', 'unsupervised-schedular'); ?></p>
 
     <?php if ('' !== $notice) : ?>
         <div class="notice notice-info is-dismissible"><p><?php echo esc_html($notice); ?></p></div>
@@ -22,108 +22,40 @@ if (! defined('ABSPATH')) {
     <?php if (empty($classes)) : ?>
         <p><?php esc_html_e('You have no group classes.', 'unsupervised-schedular'); ?></p>
     <?php else : ?>
-        <?php foreach ($classes as $class) : ?>
-            <h2>
-                <?php echo esc_html($class['title']); ?>
-                <?php if ($class['invite_only']) : ?>
-                    <span class="dashicons dashicons-lock" title="<?php esc_attr_e('Invite only', 'unsupervised-schedular'); ?>"></span>
-                <?php endif; ?>
-                <span class="count">
-                    <?php
-                    if (null === $class['capacity']) {
-                        printf(
-                            /* translators: %d: number of enrolled students. */
-                            esc_html__('(%d enrolled)', 'unsupervised-schedular'),
-                            (int) $class['enrolled']
-                        );
-                    } else {
-                        printf(
-                            /* translators: 1: number of enrolled students, 2: class capacity. */
-                            esc_html__('(%1$d / %2$d enrolled)', 'unsupervised-schedular'),
-                            (int) $class['enrolled'],
-                            (int) $class['capacity']
-                        );
-                    }
-                    ?>
-                </span>
-            </h2>
-
-            <?php if (empty($class['roster'])) : ?>
-                <p><?php esc_html_e('No enrolments yet.', 'unsupervised-schedular'); ?></p>
-            <?php else : ?>
-                <table class="wp-list-table widefat fixed striped">
-                    <thead>
-                        <tr>
-                            <th><?php esc_html_e('Student', 'unsupervised-schedular'); ?></th>
-                            <th><?php esc_html_e('Enrolment', 'unsupervised-schedular'); ?></th>
-                            <th><?php esc_html_e('Payment', 'unsupervised-schedular'); ?></th>
-                        </tr>
-                    </thead>
-                    <tbody>
-                        <?php foreach ($class['roster'] as $entry) : ?>
-                            <tr>
-                                <td><?php echo esc_html($entry['student']); ?></td>
-                                <td><?php echo esc_html($entry['status']); ?></td>
-                                <td><?php echo esc_html($entry['payment'] ?? '—'); ?></td>
-                            </tr>
-                        <?php endforeach; ?>
-                    </tbody>
-                </table>
-            <?php endif; ?>
-
-            <?php if ($class['invite_only']) : ?>
-                <?php if (! empty($class['invited'])) : ?>
-                    <h4><?php esc_html_e('Invited (not yet enrolled)', 'unsupervised-schedular'); ?></h4>
-                    <ul class="ul-disc">
-                        <?php foreach ($class['invited'] as $invitee) : ?>
-                            <li><?php echo esc_html($invitee['who'] . ' — ' . $invitee['kind']); ?></li>
-                        <?php endforeach; ?>
-                    </ul>
-                <?php endif; ?>
-
-                <div class="us-group-invite-controls" style="display:flex; flex-wrap:wrap; gap:2em; margin:1em 0 2em;">
-                    <form method="post">
-                        <?php wp_nonce_field('usc_group_action'); ?>
-                        <input type="hidden" name="offering_id" value="<?php echo esc_attr((string) $class['id']); ?>">
-                        <h4><?php esc_html_e('Add students directly', 'unsupervised-schedular'); ?></h4>
-                        <p class="description"><?php esc_html_e('Enrols them now with a pending payment.', 'unsupervised-schedular'); ?></p>
-                        <select name="student_ids[]" multiple size="5" style="min-width:16em;">
-                            <?php foreach ($students as $student) : ?>
-                                <option value="<?php echo esc_attr((string) $student['id']); ?>"><?php echo esc_html($student['name']); ?></option>
-                            <?php endforeach; ?>
-                        </select>
-                        <p>
-                            <button type="submit" name="usc_action" value="add_direct" class="button"><?php esc_html_e('Add to class', 'unsupervised-schedular'); ?></button>
-                        </p>
-                    </form>
-
-                    <form method="post">
-                        <?php wp_nonce_field('usc_group_action'); ?>
-                        <input type="hidden" name="offering_id" value="<?php echo esc_attr((string) $class['id']); ?>">
-                        <h4><?php esc_html_e('Make available to students', 'unsupervised-schedular'); ?></h4>
-                        <p class="description"><?php esc_html_e('Grants access so they can enrol themselves.', 'unsupervised-schedular'); ?></p>
-                        <select name="student_ids[]" multiple size="5" style="min-width:16em;">
-                            <?php foreach ($students as $student) : ?>
-                                <option value="<?php echo esc_attr((string) $student['id']); ?>"><?php echo esc_html($student['name']); ?></option>
-                            <?php endforeach; ?>
-                        </select>
-                        <p>
-                            <button type="submit" name="usc_action" value="grant_access" class="button"><?php esc_html_e('Grant access', 'unsupervised-schedular'); ?></button>
-                        </p>
-                    </form>
-
-                    <form method="post">
-                        <?php wp_nonce_field('usc_group_action'); ?>
-                        <input type="hidden" name="offering_id" value="<?php echo esc_attr((string) $class['id']); ?>">
-                        <h4><?php esc_html_e('Invite by email', 'unsupervised-schedular'); ?></h4>
-                        <p class="description"><?php esc_html_e('For someone without an account yet.', 'unsupervised-schedular'); ?></p>
-                        <input type="email" name="email" class="regular-text" placeholder="<?php esc_attr_e('[email protected]', 'unsupervised-schedular'); ?>">
-                        <p>
-                            <button type="submit" name="usc_action" value="invite_email" class="button"><?php esc_html_e('Send invite', 'unsupervised-schedular'); ?></button>
-                        </p>
-                    </form>
-                </div>
-            <?php endif; ?>
-        <?php endforeach; ?>
+        <table class="wp-list-table widefat fixed striped">
+            <thead>
+                <tr>
+                    <th><?php esc_html_e('Class', 'unsupervised-schedular'); ?></th>
+                    <th><?php esc_html_e('When', 'unsupervised-schedular'); ?></th>
+                    <th><?php esc_html_e('Enrolled', 'unsupervised-schedular'); ?></th>
+                    <th><?php esc_html_e('Actions', 'unsupervised-schedular'); ?></th>
+                </tr>
+            </thead>
+            <tbody>
+                <?php foreach ($classes as $class) : ?>
+                    <tr>
+                        <td>
+                            <?php echo esc_html($class['title']); ?>
+                            <?php if ($class['invite_only']) : ?>
+                                <span class="dashicons dashicons-lock" title="<?php esc_attr_e('Invite only', 'unsupervised-schedular'); ?>"></span>
+                            <?php endif; ?>
+                        </td>
+                        <td><?php echo '' !== $class['when'] ? esc_html($class['when']) : '&mdash;'; ?></td>
+                        <td>
+                            <?php
+                            if (null === $class['capacity']) {
+                                echo esc_html((string) $class['enrolled']);
+                            } else {
+                                echo esc_html($class['enrolled'] . ' / ' . $class['capacity']);
+                            }
+                            ?>
+                        </td>
+                        <td>
+                            <a class="button button-small" href="<?php echo esc_url(add_query_arg('class_id', (int) $class['id'], $baseUrl)); ?>"><?php echo $class['invite_only'] ? esc_html__('View & invite', 'unsupervised-schedular') : esc_html__('View details', 'unsupervised-schedular'); ?></a>
+                        </td>
+                    </tr>
+                <?php endforeach; ?>
+            </tbody>
+        </table>
     <?php endif; ?>
 </div>

templates/admin/offerings.php

@@ -10,6 +10,9 @@ if (! defined('ABSPATH')) {
 /**
  * @var list<\Unsupervised\Schedular\Offering\Offering> $offerings
  * @var \Unsupervised\Schedular\Offering\Offering|null  $editing  Offering loaded into the form, or null when adding.
+ * @var list<array{id: int, name: string}>              $instructors  Instructors offered in the assignment picker (studio admins only).
+ * @var bool                                            $manageAll  Whether the current user may assign classes to other instructors.
+ * @var string                                          $notice  Status message from the last save (slot-clearing / conflicts).
  */
 
 $baseUrl = admin_url('admin.php?page=us-offerings');
@@ -26,6 +29,10 @@ if ($editing && null !== $editing->termStart && null !== $editing->termEnd && $e
 <div class="wrap">
     <h1><?php esc_html_e('Offerings', 'unsupervised-schedular'); ?></h1>
 
+    <?php if ('' !== $notice) : ?>
+        <div class="notice notice-info is-dismissible"><p><?php echo esc_html($notice); ?></p></div>
+    <?php endif; ?>
+
     <h2><?php $editing ? esc_html_e('Edit Offering', 'unsupervised-schedular') : esc_html_e('Add Offering', 'unsupervised-schedular'); ?></h2>
     <form method="post">
         <?php wp_nonce_field('usc_offering_action'); ?>
@@ -49,6 +56,19 @@ if ($editing && null !== $editing->termStart && null !== $editing->termEnd && $e
                     </select>
                 </td>
             </tr>
+            <?php if ($manageAll) : ?>
+                <tr>
+                    <th><label for="class_instructor_id"><?php esc_html_e('Instructor', 'unsupervised-schedular'); ?></label></th>
+                    <td>
+                        <select name="class_instructor_id" id="class_instructor_id">
+                            <?php foreach ($instructors as $instructor) : ?>
+                                <option value="<?php echo esc_attr((string) $instructor['id']); ?>" <?php echo $editing && $editing->instructorId === $instructor['id'] ? 'selected' : ''; ?>><?php echo esc_html($instructor['name']); ?></option>
+                            <?php endforeach; ?>
+                        </select>
+                        <p class="description"><?php esc_html_e('Who teaches this. Assigning a group class clears that instructor’s open booking slots at the class time.', 'unsupervised-schedular'); ?></p>
+                    </td>
+                </tr>
+            <?php endif; ?>
             <tr>
                 <th><label for="description"><?php esc_html_e('Description', 'unsupervised-schedular'); ?></label></th>
                 <td><textarea name="description" id="description" class="large-text" rows="4"><?php echo esc_textarea($editing->description ?? ''); ?></textarea></td>
@@ -85,6 +105,13 @@ if ($editing && null !== $editing->termStart && null !== $editing->termEnd && $e
                     <span class="description"><?php esc_html_e('Group classes only — date of the first class', 'unsupervised-schedular'); ?></span>
                 </td>
             </tr>
+            <tr>
+                <th><label for="class_time"><?php esc_html_e('Class time', 'unsupervised-schedular'); ?></label></th>
+                <td>
+                    <input type="time" name="class_time" id="class_time" value="<?php echo esc_attr(null === ($editing->classTime ?? null) ? '' : substr((string) $editing->classTime, 0, 5)); ?>">
+                    <span class="description"><?php esc_html_e('Group classes only — the time each session starts. Combined with the duration to block the instructor’s availability.', 'unsupervised-schedular'); ?></span>
+                </td>
+            </tr>
             <tr>
                 <th><?php esc_html_e('Sessions', 'unsupervised-schedular'); ?></th>
                 <td>
@@ -164,10 +191,17 @@ if ($editing && null !== $editing->termStart && null !== $editing->termEnd && $e
                         <td>
                             <?php if (null === $offering->termStart) : ?>
                                 &mdash;
-                            <?php elseif (null === $offering->termEnd || $offering->termEnd === $offering->termStart) : ?>
-                                <?php echo esc_html((string) mysql2date('M j, Y', $offering->termStart)); ?>
                             <?php else : ?>
-                                <?php echo esc_html((string) mysql2date('M j, Y', $offering->termStart) . ' – ' . (string) mysql2date('M j, Y', $offering->termEnd)); ?>
+                                <?php
+                                if (null === $offering->termEnd || $offering->termEnd === $offering->termStart) {
+                                    echo esc_html((string) mysql2date('M j, Y', $offering->termStart));
+                                } else {
+                                    echo esc_html((string) mysql2date('M j, Y', $offering->termStart) . ' – ' . (string) mysql2date('M j, Y', $offering->termEnd));
+                                }
+                                if (null !== $offering->classTime) {
+                                    echo '<br><span class="description">' . esc_html((string) mysql2date('g:i a', $offering->termStart . ' ' . $offering->classTime)) . '</span>';
+                                }
+                                ?>
                             <?php endif; ?>
                         </td>
                         <td><?php echo $offering->isActive ? esc_html__('Yes', 'unsupervised-schedular') : esc_html__('No', 'unsupervised-schedular'); ?></td>