Vite + Hono + TanStack port of the Shopify storefront

Ports nextjs-templates/shopify-storefront to Vite, TanStack Router/Query,
Tailwind v4 and Hono, without the AI store assistant.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

server/session.ts

@@ -0,0 +1,29 @@
+// Customer session, stored in an httpOnly cookie. Server-only: the access token
+// must never reach the browser's JavaScript.
+import type { Context } from 'hono';
+import { getCookie, setCookie, deleteCookie } from 'hono/cookie';
+import { CUSTOMER_TOKEN_COOKIE } from '@/services/shopify/customer';
+
+export function getSessionToken(c: Context): string | null {
+  return getCookie(c, CUSTOMER_TOKEN_COOKIE) ?? null;
+}
+
+export function setSessionToken(
+  c: Context,
+  accessToken: string,
+  expiresAt: string
+): void {
+  const expires = new Date(expiresAt);
+
+  setCookie(c, CUSTOMER_TOKEN_COOKIE, accessToken, {
+    httpOnly: true,
+    secure: import.meta.env.PROD,
+    sameSite: 'Lax',
+    path: '/',
+    expires: Number.isNaN(expires.getTime()) ? undefined : expires,
+  });
+}
+
+export function clearSessionToken(c: Context): void {
+  deleteCookie(c, CUSTOMER_TOKEN_COOKIE, { path: '/' });
+}