[EuiRefreshInterval] Migrate from class to function component #9499
Description
EuiRefreshInterval provides controls for setting auto-refresh interval (value + time unit) within the date picker.
- File:
components/date_picker/auto_refresh/refresh_interval.tsx - Class size: 214 lines
- State:
value,units,min - Lifecycle: None
Migration notes:
No lifecycle methods. State is straightforward. Time unit conversion logic is the main complexity.
Acceptance criteria:
- Convert to function component with
useState - Maintain time unit conversion and validation
- All existing tests pass