fix: resolve Psalm type errors in learner management

- Split course/lesson repo branches to avoid union type on save()
- Guard $post_id against false before passing to repo get()
- Cast wp_date() return to string to satisfy esc_attr() type

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: donnapep

includes/admin/class-sensei-learner-management.php

@@ -521,23 +521,28 @@ public function edit_date_started() {
 			exit( '' );
 		}
 
+		$utc_date = $date->setTimezone( new \DateTimeZone( 'UTC' ) );
+
 		if ( 'course' === $post_type ) {
 			$repository = Sensei()->course_progress_repository_factory->create();
 			$progress   = $repository->get( $post_id, $user_id );
+			if ( ! $progress ) {
+				exit( '' );
+			}
+			$old_started_at = $progress->get_started_at();
+			$progress->set_started_at( $utc_date );
+			$repository->save( $progress );
 		} else {
 			$repository = Sensei()->lesson_progress_repository_factory->create();
 			$progress   = $repository->get( $post_id, $user_id );
+			if ( ! $progress ) {
+				exit( '' );
+			}
+			$old_started_at = $progress->get_started_at();
+			$progress->set_started_at( $utc_date );
+			$repository->save( $progress );
 		}
 
-		if ( ! $progress ) {
-			exit( '' );
-		}
-
-		$utc_date       = $date->setTimezone( new \DateTimeZone( 'UTC' ) );
-		$old_started_at = $progress->get_started_at();
-		$progress->set_started_at( $utc_date );
-		$repository->save( $progress );
-
 		$updated        = ( null === $old_started_at || $old_started_at->getTimestamp() !== $utc_date->getTimestamp() );
 		$formatted_date = $date->format( 'Y-m-d H:i:s' );
 

includes/admin/class-sensei-learners-main.php

@@ -536,15 +536,18 @@ protected function get_row_data( $item ) {
 					$actions[] = $edit_start_date_form;
 				}
 
-				if ( 'course' === $post_type ) {
-					$progress_repository = Sensei()->course_progress_repository_factory->create();
-					$learner_progress    = $progress_repository->get( $post_id, $user_activity->user_id );
-				} else {
-					$progress_repository = Sensei()->lesson_progress_repository_factory->create();
-					$learner_progress    = $progress_repository->get( $post_id, $user_activity->user_id );
+				$learner_progress = null;
+				if ( $post_id ) {
+					if ( 'course' === $post_type ) {
+						$progress_repository = Sensei()->course_progress_repository_factory->create();
+						$learner_progress    = $progress_repository->get( (int) $post_id, $user_activity->user_id );
+					} else {
+						$progress_repository = Sensei()->lesson_progress_repository_factory->create();
+						$learner_progress    = $progress_repository->get( (int) $post_id, $user_activity->user_id );
+					}
 				}
 				$learner_started_at = $learner_progress ? $learner_progress->get_started_at() : null;
-				$date_started       = $learner_started_at ? wp_date( 'Y-m-d H:i:s', $learner_started_at->getTimestamp(), wp_timezone() ) : '';
+				$date_started       = $learner_started_at ? (string) wp_date( 'Y-m-d H:i:s', $learner_started_at->getTimestamp(), wp_timezone() ) : '';
 				$date_input         = '<input class="edit-date-date-picker" data-name="start-date" type="text" value="' . esc_attr( $date_started ) . '">';
 
 				/**