// web-app.jsx — shell: auth + routing + live clock + theme function WebApp() { const { useState, useEffect } = React; const [user, setUser] = useState(() => MA.loadSession()); const [now, setNow] = useState(new Date()); const [dark, setDark] = useState(() => localStorage.getItem('motoart_dark') === '1'); useEffect(() => { const id = setInterval(() => setNow(new Date()), 1000); return () => clearInterval(id); }, []); const theme = dark ? 'dark' : 'light'; const toggleTheme = () => setDark(d => { localStorage.setItem('motoart_dark', d ? '0' : '1'); return !d; }); const logout = () => { MA.clearSession(); setUser(null); }; return (