fix(updates_xml): restore <client>site</client> for all extension types

Joomla requires the client tag to match updates to installed extensions.
Without it, extension_id=0 in #__updates and the update is invisible.

Authored-by: Moko Consulting
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

cli/updates_xml_build.php

@@ -217,12 +217,12 @@ $releaseTagMap = [
 $primarySuffix = $stabilitySuffixMap[$stability] ?? '';
 $primaryVersion = $version . $primarySuffix;
 
-// Build client tag — only needed for templates and modules (site vs admin).
-// Packages and components don't use client; plugins use folder instead.
+// Build client tag — Joomla requires <client>site</client> to match updates
+// to installed extensions. Without it, extension_id=0 in #__updates.
 $clientTag = '';
 if (!empty($extClient)) {
 	$clientTag = "    <client>{$extClient}</client>";
-} elseif (in_array($extType, ['template', 'module'])) {
+} else {
 	$clientTag = '    <client>site</client>';
 }
 
@@ -339,6 +339,8 @@ if (file_exists($dest)) {
 		for ($i = 0; $i <= $stabilityIndex; $i++) {
 			$writtenChannels[] = $stabilityTagMap[$allChannels[$i]] ?? $allChannels[$i];
 		}
+		// Also match legacy/alternate tag names (e.g. 'development' = 'dev')
+		$writtenChannels[] = 'development'; // alias for 'dev'
 
 		foreach ($existingXml->update as $existingUpdate) {
 			$existingTag = '';