Per feedback on PAP-186: containers should have hard edges but buttons,
comment containers, project icons, and company icons should keep rounding.
- Restore --radius-sm (6px) and --radius-md (8px) for buttons/inputs
- Keep --radius-lg and --radius-xl at 0 for cards/containers/dialogs
- Add rounded-sm to comment container divs in CommentThread
- Replace rounded-xl with rounded-[14px] on company icons (CompanyRail,
CompanySettings) since --radius-xl is 0
- Fix brand color dot in Sidebar (rounded → rounded-sm)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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