Restore: Sync Gutenberg @ 8c78d87453509661a9f28f978ba2c242d515563b

See changelog in 21d3c57

> Editor: Bump pinned hash for the Gutenberg repository.
> This updates the pinned hash from the `gutenberg` from `9b8144036fa5faf75de43d4502ff9809fcf689ad` to `8c78d87453509661a9f28f978ba2c242d515563b`.
>
> The following changes are included:

Author: ellatrix

src/wp-includes/assets/script-loader-packages.min.php

@@ -100,7 +100,7 @@
       'wp-url',
       'wp-warning'
     ),
-    'version' => 'ca7e8cfd2cd06d8897bb'
+    'version' => 'd803068b8e202e8ddcc9'
   ),
   'block-library.min.js' => array(
     'dependencies' => array(
@@ -142,7 +142,7 @@
         'import' => 'dynamic'
       )
     ),
-    'version' => 'c2d339cfc3f518d7ae7d'
+    'version' => '34fa1c224ed894b32e72'
   ),
   'block-serialization-default-parser.min.js' => array(
     'dependencies' => array(
@@ -175,7 +175,7 @@
       'wp-shortcode',
       'wp-warning'
     ),
-    'version' => '043731fad526d26793c6'
+    'version' => 'ef38e42500165bfda301'
   ),
   'commands.min.js' => array(
     'dependencies' => array(
@@ -214,7 +214,7 @@
       'wp-rich-text',
       'wp-warning'
     ),
-    'version' => '0405cfa25ddf48f7c0f2'
+    'version' => 'e778951c7b5eb4671d91'
   ),
   'compose.min.js' => array(
     'dependencies' => array(
@@ -266,7 +266,7 @@
       'wp-url',
       'wp-warning'
     ),
-    'version' => 'f45e47fb68691ad2950f'
+    'version' => '767b16974e5758002db2'
   ),
   'customize-widgets.min.js' => array(
     'dependencies' => array(
@@ -377,7 +377,7 @@
         'import' => 'static'
       )
     ),
-    'version' => '8a4bb8684179cd65c841'
+    'version' => '5eccb583f18c127f6b68'
   ),
   'edit-site.min.js' => array(
     'dependencies' => array(
@@ -424,7 +424,7 @@
         'import' => 'static'
       )
     ),
-    'version' => 'f1371886f952c7d1e117'
+    'version' => 'd2dda88d87840f09cc45'
   ),
   'edit-widgets.min.js' => array(
     'dependencies' => array(
@@ -511,7 +511,7 @@
         'import' => 'static'
       )
     ),
-    'version' => 'f01d293e2d88336274ff'
+    'version' => 'd6964395bb65759fe0ab'
   ),
   'element.min.js' => array(
     'dependencies' => array(

src/wp-includes/assets/script-modules-packages.min.php

@@ -175,7 +175,7 @@
       'wp-i18n',
       'wp-private-apis'
     ),
-    'version' => 'bd74f3db1cc1555ee90d'
+    'version' => '0db9a26c7920b6ab9f4a'
   ),
   'core-abilities/index.min.js' => array(
     'dependencies' => array(
@@ -298,7 +298,7 @@
     'dependencies' => array(
 
     ),
-    'version' => 'a742676bcc8809271cc6'
+    'version' => '61b86a5f5540ba666280'
   ),
   'workflow/index.min.js' => array(
     'dependencies' => array(

src/wp-includes/blocks/accordion-item.php

@@ -6,13 +6,12 @@
  * @package WordPress
  * @since 6.9.0
  *
- * @param array $attributes The block attributes.
- * @param string $content The block content.
- *
+ * @param array{ openByDefault: bool } $attributes The block attributes.
+ * @param string                        $content   The block content.
  * @return string Returns the updated markup.
  */
-function block_core_accordion_item_render( $attributes, $content ) {
-	if ( ! $content ) {
+function block_core_accordion_item_render( array $attributes, string $content ): string {
+	if ( '' === $content ) {
 		return $content;
 	}
 
@@ -56,6 +55,19 @@ function block_core_accordion_item_render( $attributes, $content ) {
 		}
 	}
 
+	/*
+	 * If an Accordion Item is collapsed by default, ensure any contained IMG has fetchpriority=low to deprioritize it
+	 * from contending with resources in the critical rendering path. In contrast, remove the loading attribute to
+	 * prevent the image from not being available when the item is expanded.
+	 */
+	if ( ! $attributes['openByDefault'] ) {
+		$processor = new WP_HTML_Tag_Processor( $content );
+		while ( $processor->next_tag( 'IMG' ) ) {
+			$processor->set_attribute( 'fetchpriority', 'low' );
+		}
+		$content = $processor->get_updated_html();
+	}
+
 	return $content;
 }
 

src/wp-includes/blocks/cover.php

@@ -66,6 +66,14 @@ function render_block_core_cover( $attributes, $content ) {
 						$query_params['controls']       = '0';
 						$query_params['modestbranding'] = '1';
 						$query_params['playsinline']    = '1';
+
+						// For loop to work, we need the playlist parameter.
+						$path          = $parsed_url['path'] ?? '';
+						$path_segments = explode( '/', $path );
+						$video_id      = end( $path_segments );
+						if ( $video_id ) {
+								$query_params['playlist'] = $video_id;
+						}
 					} elseif ( 'vimeo' === $provider ) {
 						$query_params['autoplay']    = '1';
 						$query_params['muted']       = '1';

src/wp-includes/blocks/details.php

@@ -0,0 +1,47 @@
+<?php
+/**
+ * Server-side rendering of the `core/details` block.
+ *
+ * @package WordPress
+ */
+
+/**
+ * Sets fetchpriority="low" on all IMG tags within the collapsed Details block.
+ *
+ * Images in a collapsed Details block are hidden until the block is expanded, so they should
+ * not compete with any resources in the critical rendering path, such as the LCP element image.
+ *
+ * @since 7.0.0
+ *
+ * @param string $block_content The block content.
+ * @param array  $block         The full block, including name and attributes.
+ * @return string Modified HTML with fetchpriority="low" on all IMG tags when the showContent attribute is false.
+ */
+function block_core_details_set_img_fetchpriority_low( $block_content, array $block ): string {
+	if ( ! is_string( $block_content ) ) {
+		return '';
+	}
+
+	// If the Details block is open by default, short-circuit to let core add fetchpriority=high if appropriate.
+	if ( $block['attrs']['showContent'] ?? false ) {
+		return $block_content;
+	}
+
+	$tags = new WP_HTML_Tag_Processor( $block_content );
+	while ( $tags->next_tag( 'IMG' ) ) {
+		$tags->set_attribute( 'fetchpriority', 'low' );
+	}
+	return $tags->get_updated_html();
+}
+
+add_filter( 'render_block_core/details', 'block_core_details_set_img_fetchpriority_low', 10, 2 );
+
+/**
+ * Registers the `core/details` block on server.
+ *
+ * @since 7.0.0
+ */
+function register_block_core_details() {
+	register_block_type_from_metadata( __DIR__ . '/details' );
+}
+add_action( 'init', 'register_block_core_details' );

src/wp-includes/blocks/navigation.php

@@ -710,6 +710,12 @@ private static function get_responsive_container_markup( $attributes, $inner_blo
 				$tags                = new WP_HTML_Tag_Processor( $overlay_blocks_html );
 				$overlay_blocks_html = block_core_navigation_add_directives_to_overlay_close( $tags );
 			}
+			// Images in the overlay are hidden until the menu is opened. Pre-set
+			// fetchpriority="low" so that when wp_filter_content_tags() processes the
+			// parent template part, it sees the attribute already present and calls
+			// wp_get_loading_optimization_attributes() with fetchpriority="low", which both prevents
+			// fetchpriority="high" from being added and stops the LCP counter from being incremented.
+			$overlay_blocks_html = block_core_navigation_set_overlay_image_fetch_priority( $overlay_blocks_html );
 		}
 
 		$has_custom_overlay = ! empty( $overlay_blocks_html );
@@ -1111,6 +1117,25 @@ function block_core_navigation_add_directives_to_overlay_close( $tags ) {
 	return $tags->get_updated_html();
 }
 
+/**
+ * Sets fetchpriority="low" on all IMG tags within the navigation overlay.
+ *
+ * Images in the overlay are hidden until the menu is opened, so they should
+ * not compete with any actual LCP element image on the page.
+ *
+ * @since 7.0.0
+ *
+ * @param string $overlay_blocks_html The rendered HTML of the overlay blocks.
+ * @return string Modified HTML with fetchpriority="low" on all IMG tags.
+ */
+function block_core_navigation_set_overlay_image_fetch_priority( string $overlay_blocks_html ): string {
+	$tags = new WP_HTML_Tag_Processor( $overlay_blocks_html );
+	while ( $tags->next_tag( 'IMG' ) ) {
+		$tags->set_attribute( 'fetchpriority', 'low' );
+	}
+	return $tags->get_updated_html();
+}
+
 /**
  * Add Interactivity API directives to the navigation-submenu and page-list
  * blocks markup using the Tag Processor.

src/wp-includes/blocks/require-dynamic-blocks.php

@@ -24,6 +24,7 @@
 require_once ABSPATH . WPINC . '/blocks/comments-pagination-previous.php';
 require_once ABSPATH . WPINC . '/blocks/comments-title.php';
 require_once ABSPATH . WPINC . '/blocks/cover.php';
+require_once ABSPATH . WPINC . '/blocks/details.php';
 require_once ABSPATH . WPINC . '/blocks/file.php';
 require_once ABSPATH . WPINC . '/blocks/footnotes.php';
 require_once ABSPATH . WPINC . '/blocks/gallery.php';

src/wp-includes/blocks/require-static-blocks.php

@@ -10,7 +10,6 @@
 	'code',
 	'column',
 	'columns',
-	'details',
 	'embed',
 	'freeform',
 	'group',