fix: preserve version suffix (-dev/-rc/etc) in version_bump.php

version_bump.php was stripping stability suffixes (e.g. -dev, -rc) from
Joomla extension manifest <version> tags during auto-bump. Now captures
the suffix from the source version and re-applies it after incrementing.

manifest.xml and README.md remain suffix-free (canonical bare version).
Only Joomla extension manifests preserve their suffix.

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

cli/version_read.php

@@ -54,6 +54,7 @@ if (file_exists($readme)) {
 
 // -- 3. Fallback: Joomla manifest XML --
 $manifestVersion = null;
+$manifestVersionSuffix = '';
 $manifestFiles = array_merge(
     glob("{$root}/src/pkg_*.xml") ?: [],
     glob("{$root}/src/*.xml") ?: [],
@@ -66,10 +67,12 @@ foreach ($manifestFiles as $xmlFile) {
     if (strpos($xmlContent, '<extension') === false && strpos($xmlContent, '<version>') === false) {
         continue;
     }
-    if (preg_match('|<version>(\d{2}\.\d{2}\.\d{2})(?:-[a-z]+)?</version>|', $xmlContent, $xm)) {
+    if (preg_match('|<version>(\d{2}\.\d{2}\.\d{2})(-[a-z]+)?</version>|', $xmlContent, $xm)) {
         $candidate = $xm[1];
+        $candidateSuffix = isset($xm[2]) ? $xm[2] : '';
         if ($manifestVersion === null || version_compare($candidate, $manifestVersion, '>')) {
             $manifestVersion = $candidate;
+            $manifestVersionSuffix = $candidateSuffix;
         }
     }
 }
@@ -103,9 +106,11 @@ $candidates = array_filter([
 ]);
 
 $version = null;
+$versionSource = '';
 foreach ($candidates as $candidate) {
     if ($version === null || version_compare($candidate, $version, '>')) {
         $version = $candidate;
+        $versionSource = ($candidate === $manifestVersion) ? 'manifest' : 'other';
     }
 }
 
@@ -114,6 +119,11 @@ if ($version === null) {
     exit(1);
 }
 
+// Append suffix if the version came from a Joomla manifest with a suffix
+if ($versionSource === 'manifest' && !empty($manifestVersionSuffix)) {
+    $version .= $manifestVersionSuffix;
+}
+
 // -- Backfill: if manifest.xml exists but lacks <version>, insert it --
 if (file_exists($mokoManifest)) {
     $content = file_get_contents($mokoManifest);