diff -r 7b1b88e27a20 -r 48c4eec2b7e6 wp/wp-includes/customize/class-wp-customize-header-image-control.php
--- a/wp/wp-includes/customize/class-wp-customize-header-image-control.php	Thu Sep 29 08:06:27 2022 +0200
+++ b/wp/wp-includes/customize/class-wp-customize-header-image-control.php	Fri Sep 05 18:40:08 2025 +0200
@@ -15,6 +15,7 @@
  * @see WP_Customize_Image_Control
  */
 class WP_Customize_Header_Image_Control extends WP_Customize_Image_Control {
+
 	/**
 	 * Customize control type.
 	 *
@@ -61,7 +62,6 @@
 				'get_url'  => 'get_header_image',
 			)
 		);
-
 	}
 
 	/**
@@ -130,14 +130,26 @@
 			<# } else { #>
 
 			<button type="button" class="choice thumbnail"
-				data-customize-image-value="{{{data.header.url}}}"
+				data-customize-image-value="{{data.header.url}}"
 				data-customize-header-image-data="{{JSON.stringify(data.header)}}">
-				<span class="screen-reader-text"><?php _e( 'Set image' ); ?></span>
-				<img src="{{{data.header.thumbnail_url}}}" alt="{{{data.header.alt_text || data.header.description}}}" />
+				<span class="screen-reader-text">
+					<?php
+					/* translators: Hidden accessibility text. */
+					_e( 'Set image' );
+					?>
+				</span>
+				<img src="{{data.header.thumbnail_url}}" alt="{{data.header.alt_text || data.header.description}}" />
 			</button>
 
 			<# if ( data.type === 'uploaded' ) { #>
-				<button type="button" class="dashicons dashicons-no close"><span class="screen-reader-text"><?php _e( 'Remove image' ); ?></span></button>
+				<button type="button" class="dashicons dashicons-no close">
+					<span class="screen-reader-text">
+						<?php
+						/* translators: Hidden accessibility text. */
+						_e( 'Remove image' );
+						?>
+					</span>
+				</button>
 			<# } #>
 
 			<# } #>
@@ -158,7 +170,7 @@
 
 				<# } else { #>
 
-			<img src="{{{data.header.thumbnail_url}}}" alt="{{{data.header.alt_text || data.header.description}}}" />
+			<img src="{{data.header.thumbnail_url}}" alt="{{data.header.alt_text || data.header.description}}" />
 
 				<# } #>
 			<# } else { #>
@@ -200,23 +212,23 @@
 			<p class="customizer-section-intro customize-control-description">
 				<?php
 				if ( current_theme_supports( 'custom-header', 'video' ) ) {
-					_e( 'Click &#8220;Add new image&#8221; to upload an image file from your computer. Your theme works best with an image that matches the size of your video &#8212; you&#8217;ll be able to crop your image once you upload it for a perfect fit.' );
+					_e( 'Click &#8220;Add New Image&#8221; to upload an image file from your computer. Your theme works best with an image that matches the size of your video &#8212; you&#8217;ll be able to crop your image once you upload it for a perfect fit.' );
 				} elseif ( $width && $height ) {
 					printf(
 						/* translators: %s: Header size in pixels. */
-						__( 'Click &#8220;Add new image&#8221; to upload an image file from your computer. Your theme works best with an image with a header size of %s pixels &#8212; you&#8217;ll be able to crop your image once you upload it for a perfect fit.' ),
+						__( 'Click &#8220;Add New Image&#8221; to upload an image file from your computer. Your theme works best with an image with a header size of %s pixels &#8212; you&#8217;ll be able to crop your image once you upload it for a perfect fit.' ),
 						sprintf( '<strong>%s &times; %s</strong>', $width, $height )
 					);
 				} elseif ( $width ) {
 					printf(
 						/* translators: %s: Header width in pixels. */
-						__( 'Click &#8220;Add new image&#8221; to upload an image file from your computer. Your theme works best with an image with a header width of %s pixels &#8212; you&#8217;ll be able to crop your image once you upload it for a perfect fit.' ),
+						__( 'Click &#8220;Add New Image&#8221; to upload an image file from your computer. Your theme works best with an image with a header width of %s pixels &#8212; you&#8217;ll be able to crop your image once you upload it for a perfect fit.' ),
 						sprintf( '<strong>%s</strong>', $width )
 					);
 				} else {
 					printf(
 						/* translators: %s: Header height in pixels. */
-						__( 'Click &#8220;Add new image&#8221; to upload an image file from your computer. Your theme works best with an image with a header height of %s pixels &#8212; you&#8217;ll be able to crop your image once you upload it for a perfect fit.' ),
+						__( 'Click &#8220;Add New Image&#8221; to upload an image file from your computer. Your theme works best with an image with a header height of %s pixels &#8212; you&#8217;ll be able to crop your image once you upload it for a perfect fit.' ),
 						sprintf( '<strong>%s</strong>', $height )
 					);
 				}
@@ -234,7 +246,7 @@
 			<div class="actions">
 				<?php if ( current_user_can( 'upload_files' ) ) : ?>
 				<button type="button"<?php echo $visibility; ?> class="button remove" aria-label="<?php esc_attr_e( 'Hide header image' ); ?>"><?php _e( 'Hide image' ); ?></button>
-				<button type="button" class="button new" id="header_image-button" aria-label="<?php esc_attr_e( 'Add new header image' ); ?>"><?php _e( 'Add new image' ); ?></button>
+				<button type="button" class="button new" id="header_image-button" aria-label="<?php esc_attr_e( 'Add New Header Image' ); ?>"><?php _e( 'Add New Image' ); ?></button>
 				<?php endif; ?>
 			</div>
 			<div class="choices">