Show a warning banner when a redirect path matches the current page
path, indicating the redirect will override access to the page.
Changes:
- Add PanelBanner component with warning variant to page settings
- Implement findMatchingRedirect utility to detect redirect conflicts
- Show contextual warning with link to Redirects settings section
- Add comprehensive tests for redirect conflict detection
Code quality:
- Replace 'return undefined' with 'return' per style guide
- Use 'return null' for React components returning nothing
I've replaced all `"$something$something"` CSS variables with
`variables.something.something`. Now we have autocomplete and
type-safety: if a variable is removed or renamed w/o fixing the usage
the build will fail.
This will allow designers to change design tokens and either make sure
nothing is broken or if something is broken we'll know exactly what and
it will be easy to fix.
Discussed here:
https://discord.com/channels/955905230107738152/1061992022665334837
Oleg Isonen