Add private health tracker (owner-only)

- health schema: vaccinations, body_measurements, workouts, nutrition_daily,
  sleep (generated hours), medications, hair_progress, appointments
- migration with updated_at triggers; grants to personal_app only
- /trackers/health overview with add/edit/delete, owner-gated (404 otherwise),
  noindex + private no-store, hidden from listings for non-owners
- owner-only JSON/CSV import endpoint and scripts/health-import.ts

src/lib/projects.ts

@@ -71,3 +71,19 @@ export const trackers = [
 		external: false
 	}
 ] as const;
+
+// Owner-only trackers: shown in the header, home page and /trackers only to the logged-in
+// owner (layout data `isOwner`), never in the sitemap. Their routes 404 for everyone else.
+export const privateTrackers = [
+	{
+		name: 'health',
+		subtitle: 'private: body, workouts, sleep, meds and vaccinations',
+		href: '/trackers/health',
+		external: false
+	}
+] as const;
+
+type Tracker = { name: string; subtitle: string; href: string; external: boolean };
+export function visibleTrackers(isOwner: boolean): readonly Tracker[] {
+	return isOwner ? [...trackers, ...privateTrackers] : trackers;
+}