- add CreateEnvironmentPage and EditEnvironmentPage with pre-filled form
- add /environments/new and /environments/:id/edit routes
- add Edit option to card context menu and detail page toolbar
- move env id pill to card footer (left), timestamp stays right
- make env cards clickable (navigate to detail); cog stops propagation
- add hoverable Card variant with primary border+shadow on hover
- add link color tokens and global anchor styles for both themes
- fix Timestamp pill visibility in dark mode with border token
- add DescriptionList truncate prop with ellipsis and title tooltip
- stack DescriptionList dd below dt with 8px gap between items