- Moved all editor action buttons (copy, format, undo, redo, reset) from `src/components/features/playground/workspace/editor/components/` to new location `src/features/problems/code/components/toolbar/actions/`
- Introduced shared `TooltipButton` component to reduce duplication
- Created centralized `useProblemEditorActions` hook for common editor operations
- Updated imports and exports through new index file
- Maintained all existing functionality while improving code organization
