Refactor multiple UI components to use design system tokens and primitives. Added new UiIcons (coffee, wifi, xCircle, ban) and typography color getters (primary, accent). Replaced hardcoded paddings, spacings, radii, borderRadius, and icon imports (lucide_icons -> UiIcons) with UiConstants, UiColors, UiTypography and UiIcons, and switched to UiColors.withValues for opacity. Changes apply across authentication, availability, clock_in (and its widgets), commute tracker, lunch break modal, location map placeholder, attendance card, date selector, and related presentation files to improve visual consistency.