Add enrichXrefDisplay hook and xkey_ext to value edit template

- LibertyContent: add enrichXrefDisplay() no-op hook; call it in edit_xref.php
  so packages can inject display-only data (e.g. component title) into xrefInfo
- edit_xref_value_item.tpl: add Notes (xkey_ext) field alongside Value (xkey)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/includes/classes/LibertyContent.php b/includes/classes/LibertyContent.php
index 58894be..61b5d42 100755
--- a/includes/classes/LibertyContent.php
+++ b/includes/classes/LibertyContent.php
@@ -2155,6 +2155,8 @@ class LibertyContent extends LibertyBase implements BitCacheable {
 	 * @param number $pContentId a valid content id
 	 * @param array $pMixed a hash of params to add to the url
 	 */
+	public function enrichXrefDisplay( array &$pXrefInfo ): void {}
+
 	public function getXrefListTemplate( ?string $pTemplate = null ): string {
 		if( $pTemplate ) {
 			$package  = $this->mType['handler_package'] ?? 'liberty';