/**
 * POST /api/me/last-seen
 *
 * Heartbeat endpoint — sets Profile.lastSeenAt = NOW() for the authenticated user.
 * No request body required.
 *
 * Phase 1 fallback: frontend calls this on a ~60s interval while app is foregrounded.
 * Phase 2 (TODO): replace with Supabase Edge-Function triggered on presence-leave
 * events for sub-second accuracy without client-side polling.
 *
 * Response: { lastSeenAt: ISOString }
 */
import { requireUser } from "../../utils/auth";
import { touchLastSeen } from "../../db/profile";

export default defineEventHandler(async (event) => {
  const user = await requireUser(event);

  const now = await touchLastSeen(user.id);

  return { success: true, data: { lastSeenAt: now.toISOString() } };
});