Adds viewportFit: 'cover' so the PWA can draw under the notch /
Dynamic Island when installed. Nav and Toast read env(safe-area-inset-*)
to keep their content out of the hardware cutouts (no-op on browsers
without a notch — env() resolves to 0).
Replaces autoFocus on the first field of CreateAccountDialog and
CreateUserDialog with a useEffect that only focuses on pointer devices
(matchMedia '(hover: hover) and (pointer: fine)'). Phones no longer
get the soft keyboard popping the instant a dialog opens.
Drop the brutalist hazard-tape vocabulary in favor of refined modern
SaaS: white cards on zinc-50, soft ring-1 zinc-200 borders (no hard
2px black), rounded-full pills, sans for chrome + mono for tabular
data, emerald replacing yellow as the saturated accent. Theme color
shifts to zinc-900 with an emerald dot on the icon.
