[UIPKGE] Slack-style overlay scrollbar. Hides the native scrollbar so the scrolled content uses the full container width (no gutter reservation), then draws a thin auto-fading thumb absolutely positioned on top. Drag-to-scroll via Pointer Events covers mouse, touch, and pen. Vertical only. The component does
pnpm dlx shadcn@latest add "https://registry.directory/r/uday-a/overlay-scroll.json"