Render the header and footer from the root layout

Every page was importing Header and Footer and repeating the same store
name, logo, copyright and nav links. Hoisting both into the root layout
renders them once, and a new config/site.ts holds the values they shared.

The body becomes a flex column so the footer sits at the bottom of short
pages. not-found and error now render inside that chrome, so their
full-viewport centering drops to 60vh.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01D1vsTA4MX6qFd7nqSAKtdV

app/account/register/page.tsx

@@ -1,49 +1,43 @@
-import Header from '@/components/shopify/header';
-import Footer from '@/components/shopify/footer';
 import AccountForm, { AccountFormLink } from '@/components/shopify/account-form';
 
 export const metadata = { title: 'Create account — Shop' };
 
 export default function Page() {
   return (
-    <>
-      <Header storeName="Shop" logoUrl="" />
-      <main className="max-w-screen-2xl mx-auto w-full px-8 py-16">
-        <AccountForm
-          title="Create account"
-          fields={[
-            {
-              name: 'firstName',
-              label: 'First name',
-              autoComplete: 'given-name',
-              required: false,
-            },
-            {
-              name: 'lastName',
-              label: 'Last name',
-              autoComplete: 'family-name',
-              required: false,
-            },
-            { name: 'email', label: 'Email', type: 'email', autoComplete: 'email' },
-            {
-              name: 'password',
-              label: 'Password',
-              type: 'password',
-              autoComplete: 'new-password',
-            },
-          ]}
-          submitLabel="Create account"
-          endpoint="/api/account/register"
-          redirectTo="/account"
-          footer={
-            <span>
-              Already have an account?{' '}
-              <AccountFormLink href="/account/login">Sign in</AccountFormLink>
-            </span>
-          }
-        />
-      </main>
-      <Footer storeName="Shop" copyright="© 2026 Shop. All rights reserved." />
-    </>
+    <main className="max-w-screen-2xl mx-auto w-full px-8 py-16">
+      <AccountForm
+        title="Create account"
+        fields={[
+          {
+            name: 'firstName',
+            label: 'First name',
+            autoComplete: 'given-name',
+            required: false,
+          },
+          {
+            name: 'lastName',
+            label: 'Last name',
+            autoComplete: 'family-name',
+            required: false,
+          },
+          { name: 'email', label: 'Email', type: 'email', autoComplete: 'email' },
+          {
+            name: 'password',
+            label: 'Password',
+            type: 'password',
+            autoComplete: 'new-password',
+          },
+        ]}
+        submitLabel="Create account"
+        endpoint="/api/account/register"
+        redirectTo="/account"
+        footer={
+          <span>
+            Already have an account?{' '}
+            <AccountFormLink href="/account/login">Sign in</AccountFormLink>
+          </span>
+        }
+      />
+    </main>
   );
 }