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>

3 files changed, 11 insertions, 0 deletions

diff --git a/edit_xref.php b/edit_xref.php
index b58044a..bd4d161 100644
--- a/edit_xref.php
+++ b/edit_xref.php
@@ -49,6 +49,8 @@ if( !empty( $_REQUEST['fSaveXref'] ) ) {
 	$xrefInfo = $gContent->mInfo['xref_store']['data'] ?? [];
 }
 
+$gContent->enrichXrefDisplay( $xrefInfo );
+
 $gBitSmarty->assign( 'gContent', $gContent );
 $gBitSmarty->assign( 'xrefInfo', $xrefInfo );
 $gBitSmarty->assign( 'errors', $gContent->mErrors );
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';
diff --git a/templates/edit_xref_value_item.tpl b/templates/edit_xref_value_item.tpl
index 0418d1e..99e2541 100644
--- a/templates/edit_xref_value_item.tpl
+++ b/templates/edit_xref_value_item.tpl
@@ -24,6 +24,13 @@
 				{/forminput}
 			</div>
 
+			<div class="form-group">
+				{formlabel label="Notes" for="xkey_ext"}
+				{forminput}
+					<input type="text" class="form-control input-small" name="xkey_ext" id="xkey_ext" value="{$xrefInfo.xkey_ext|escape}" />
+				{/forminput}
+			</div>
+
 			<div class="form-group submit">
 				<input type="submit" class="btn btn-default" name="fCancel"   value="{tr}Cancel{/tr}" />
 				<input type="submit" class="btn btn-primary" name="fSaveXref" value="{tr}Save{/tr}" />