Fix auto-updater to fetch newest release by creation date

Use /releases?limit=1 instead of /releases/latest which sorts by
semver tag. Date-based tags (2026.03.06-1805) have a hyphen that
semver treats as a prerelease separator, causing incorrect ordering.

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

includes/class-twp-auto-updater.php

@@ -19,7 +19,7 @@ class TWP_Auto_Updater {
     public function __construct() {
         $this->plugin_basename = plugin_basename(dirname(dirname(__FILE__)) . '/twilio-wp-plugin.php');
         $this->current_version = defined('TWP_VERSION') ? TWP_VERSION : '0.0.0';
-        $this->gitea_api_url = $this->gitea_base_url . '/api/v1/repos/' . $this->gitea_repo . '/releases/latest';
+        $this->gitea_api_url = $this->gitea_base_url . '/api/v1/repos/' . $this->gitea_repo . '/releases?limit=1&draft=false';
     }
 
     /**
@@ -74,7 +74,7 @@ class TWP_Auto_Updater {
         $custom_repo = get_option('twp_gitea_repo', '');
         if (!empty($custom_repo)) {
             $this->gitea_repo = $custom_repo;
-            $this->gitea_api_url = $this->gitea_base_url . '/api/v1/repos/' . $this->gitea_repo . '/releases/latest';
+            $this->gitea_api_url = $this->gitea_base_url . '/api/v1/repos/' . $this->gitea_repo . '/releases?limit=1&draft=false';
         }
 
         $update_info = $this->get_latest_release();
@@ -184,9 +184,16 @@ class TWP_Auto_Updater {
             return false;
         }
 
-        $release = json_decode($response);
+        $releases = json_decode($response);
 
-        if (!$release || !isset($release->tag_name)) {
+        if (!$releases || !is_array($releases) || empty($releases)) {
+            error_log('TWP Auto-Updater: No releases found from Gitea');
+            return false;
+        }
+
+        $release = $releases[0];
+
+        if (!isset($release->tag_name)) {
             error_log('TWP Auto-Updater: Invalid release data from Gitea');
             return false;
         }