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.
jbrechtel