Replace semi-transparent glassmorphism menus with solid popover backgrounds.
Re-downloaded dropdown-menu, context-menu, select, combobox, menubar, and
button via `npx shadcn add --overwrite`. Also removed `focus:**:text-accent-foreground`
from DropdownMenuCheckboxItem to prevent color cascade into nested components.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Migrate all shadcn components into apps/web/components/ui/ so the web app
is fully independent from packages/ui for its UI layer. Update to the
latest shadcn base-nova style. Add missing semantic color variables
(success, warning, info, canvas), font-mono mapping, scrollbar styling,
and wrap Select items in SelectGroup for proper padding.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
