- Switch CDN to jsdelivr (matches design spec)
- Use nb-card, nb-card-title, nb-button default, nb-checkbox, nb-navbar-link
- Add Google Fonts import for Lexend Mega
- Style all route links as nb-button default buttons
- Fix navbar to use nb-navbar-brand and nb-navbar-nav
- Update style.css for new NB version compatibility
The login and signup forms used factory-function patterns (plain
functions returning vnodes with let-bindings for state). Mithril calls
these on every redraw, creating fresh let-bindings each time, so any
state set by oninput handlers was immediately discarded. This broke
text input in all form fields.
Fix: convert to proper Mithril components using vnode.state for
persistent state across redraws. Mithril auto-redraws after event
handlers, so explicit m.redraw() calls in oninput are unnecessary.