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/hooks.server.ts

@@ -1,6 +1,8 @@
 import type { Handle } from '@sveltejs/kit/hooks';
 import { building } from '$app/env';
 import { auth } from '#lib/server/auth.js';
+import { isOwner, isOwnerOnlyPath } from '#lib/server/owner.js';
+import { error } from '@sveltejs/kit';
 
 export const handle: Handle = async ({ event, resolve }) => {
 	// Match the endpoint path here: the dev proxy may terminate HTTPS before Vite.
@@ -9,5 +11,22 @@ export const handle: Handle = async ({ event, resolve }) => {
 	const session = building ? null : await auth.api.getSession({ headers: event.request.headers });
 	event.locals.user = session?.user ?? null;
 	event.locals.session = session?.session ?? null;
-	return resolve(event);
+	// Owner-only areas (health tracker). Page loads, __data.json and the import endpoint
+	// 404 for non-owners in the route itself (layout load / endpoint), which renders the
+	// same 404 page as an unknown URL. As a backstop, any other method (form actions,
+	// which skip layout loads) is refused here before a route runs.
+	const ownerOnly = isOwnerOnlyPath(event.url.pathname);
+	if (
+		ownerOnly &&
+		!isOwner(event) &&
+		event.request.method !== 'GET' &&
+		event.request.method !== 'HEAD'
+	)
+		error(404, 'Not Found');
+	const response = await resolve(event);
+	if (ownerOnly) {
+		response.headers.set('x-robots-tag', 'noindex, nofollow, noarchive');
+		response.headers.set('cache-control', 'private, no-store');
+	}
+	return response;
 };