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
Oleg Isonen
9f497a3513