Automate build number tagging and sync

frontend/app/admin/SettingsPage.tsx

@@ -300,7 +300,7 @@ export default function SettingsPage({ section }: SettingsPageProps) {
     requests_data_source: 'Pick where Magent should read requests from.',
     log_level: 'How much detail is written to the activity log.',
     log_file: 'Where the activity log is stored.',
-    site_build_number: 'Version or build identifier shown in the footer.',
+    site_build_number: 'Build number shown in the footer (auto-set from releases).',
     site_banner_enabled: 'Enable a sitewide banner for announcements.',
     site_banner_message: 'Short banner message for maintenance or updates.',
     site_banner_tone: 'Visual tone for the banner.',