style(ui): redesign calendar, select, dropdowns and fix avenants alignment
Changes
- Calendar: colored nav arrows, weekday purple line, red-navy month / blue-navy year dropdowns, removed old v8 classNames overrides
- Select: borderless trigger + panel, 3D purple hover on items
- Combobox / MultiSelect: inline search directly in trigger — no separate search bar
- TabbedForm: fix hover glitch on inactive tabs
- Driver schedule planning: sticky driver column colored #E6E1FF, timeline stays white
- Avenants list: fixed column misalignment (relative positioning + minWidth + accent bar sticky override)