Fix org name not showing in tab title, homepage, and backend pages

The browser tab title, homepage "Welcome to..." heading, and the
backend status/API docs pages all had the "Cross Code" default
hardcoded instead of reading the configured org_name setting.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

frontend/src/app/layout.tsx

@@ -44,10 +44,11 @@ async function getServerSettings(): Promise<SiteSettings> {
 export async function generateMetadata(): Promise<Metadata> {
   const settings = await getServerSettings();
   const faviconUrl = settings.favicon_url ? resolveToApiOrigin(settings.favicon_url) : null;
+  const displayName = settings.org_name || appName;
 
   return {
-    title: appName,
-    description: `Manage and register for events with ${appName}`,
+    title: displayName,
+    description: `Manage and register for events with ${displayName}`,
     icons: {
       icon: faviconUrl || "/favicon.ico",
     },