feat: update default layout

inertia/layouts/default_layout.tsx

@@ -0,0 +1,44 @@
+import { Box, rem } from '@mantine/core';
+import { PropsWithChildren } from 'react';
+import { FloatingNavbar } from '~/components/common/floating_navbar/floating_navbar';
+import { Footer } from '~/components/common/footer/footer';
+import { BaseLayout } from './_base_layout';
+
+const DefaultLayout = ({ children }: PropsWithChildren) => (
+	<BaseLayout>
+		<Layout>{children}</Layout>
+	</BaseLayout>
+);
+
+export default DefaultLayout;
+
+const LAYOUT_WIDTH = '1500px';
+const Layout = ({ children }: PropsWithChildren) => (
+	<>
+		{/* Top navbar */}
+		<FloatingNavbar width={LAYOUT_WIDTH} />
+
+		{/* Page content */}
+		<Box
+			style={{
+				paddingInline: 'var(--mantine-spacing-lg)',
+				flex: 1,
+			}}
+		>
+			<Box
+				style={{
+					height: '100%',
+					maxWidth: '100%',
+					width: LAYOUT_WIDTH,
+					marginInline: 'auto',
+					marginBlock: rem(60),
+				}}
+			>
+				{children}
+			</Box>
+		</Box>
+
+		{/* Footer */}
+		<Footer />
+	</>
+);