Fix Docker status: treat 'created' as offline, not starting

Container status 'created' means it was never started yet (e.g. after
docker create during update), so it should show as offline.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

gsm-backend/services/ssh.js

@@ -72,9 +72,9 @@ export async function getServerStatus(server) {
       const result = await ssh.execCommand(`docker inspect --format='{{.State.Status}}' ${server.containerName} 2>/dev/null`);
       const status = result.stdout.trim();
       if (status === 'running') return 'online';
-      if (status === 'restarting' || status === 'created') return 'starting';
+      if (status === 'restarting') return 'starting';
       if (status === 'removing' || status === 'paused') return 'stopping';
-      return 'offline';
+      return 'offline'; // includes 'created', 'exited', 'dead'
     } else if (server.runtime === 'systemd') {
       const result = await ssh.execCommand(`systemctl is-active ${server.serviceName}`);
       const status = result.stdout.trim();