Break down the monolithic DuplicateFinder component into smaller, highly cohesive modules to improve maintainability and separation of concerns.
- Extract empty, loading, and intro states into dedicated components (`DuplicateFinderEmptyStates`).
- Extract the complex header and action logic into `DuplicateFinderHeader`.
- Move `DuplicateGroupCard` to its own dedicated component file.
- Relocate formatting utilities like byte conversion and relative time strings to a dedicated `format.ts` file.
LyAhn
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