feat(ui): add server-side PocketBase client and session cookie hook

ui/src/hooks.server.ts

@@ -0,0 +1,23 @@
+import type { Handle } from '@sveltejs/kit';
+import { randomBytes } from 'node:crypto';
+
+const SESSION_COOKIE = 'libnovel_session';
+const ONE_YEAR = 60 * 60 * 24 * 365;
+
+export const handle: Handle = async ({ event, resolve }) => {
+	let sessionId = event.cookies.get(SESSION_COOKIE);
+
+	if (!sessionId) {
+		sessionId = randomBytes(16).toString('hex');
+		event.cookies.set(SESSION_COOKIE, sessionId, {
+			path: '/',
+			httpOnly: true,
+			sameSite: 'lax',
+			maxAge: ONE_YEAR
+		});
+	}
+
+	event.locals.sessionId = sessionId;
+
+	return resolve(event);
+};