进行了一些小修复

templates/parts/submit/context.php

@@ -66,13 +66,21 @@ if ($edit_post) {
 		];
 	} elseif (!empty($post_meta['featured_slide'])) {
 		$slides = array_filter(array_map('trim', explode(',', (string) $post_meta['featured_slide'])));
-		$featured_args['type'] = 'slide';
-		$featured_args['data'] = array_map(static function ($u) {
-			return ['url' => $u];
-		}, $slides);
+		$slide_data = [];
+		foreach ($slides as $attachment_id) {
+			$id  = absint($attachment_id);
+			$url = $id > 0 ? wp_get_attachment_image_url($id, 'full') : false;
+			if ($url) {
+				$slide_data[] = ['id' => $id, 'url' => $url];
+			}
+		}
+		if ($slide_data) {
+			$featured_args['type'] = 'slide';
+			$featured_args['data'] = $slide_data;
+		}
 	} else {
 		$thumb = get_the_post_thumbnail_url($edit_post, 'full')
-			?: (string) ($post_meta['thumbnail_url'] ?? $post_meta['cover_images'] ?? '');
+			?: (string) ($post_meta['thumbnail_url'] ?? $post_meta['cover_image'] ?? '');
 		if ($thumb !== '') {
 			$featured_args['type'] = 'image';
 			$featured_args['data'] = ['url' => $thumb];