feat(frontend): UI polishing, Character Sheet redesign, and translation updates

pwa/src/components/AuthenticatedLayout.tsx

@@ -0,0 +1,13 @@
+import { Outlet } from 'react-router-dom'
+import LandingHeader from './LandingHeader'
+
+export default function AuthenticatedLayout() {
+    return (
+        <div className="authenticated-layout" style={{ minHeight: '100vh', display: 'flex', flexDirection: 'column' }}>
+            <LandingHeader />
+            <div className="authenticated-content" style={{ flex: 1, paddingTop: '80px' }}>
+                <Outlet />
+            </div>
+        </div>
+    )
+}