- Move `BattleTable` logic from `GroupMember` to its own `BattleTable.tsx` component.
- Clean up `GroupMember` by removing unused imports (`Divider`, `Flex`, `Space`, `Table`, `getRoundTable`).
- Add new utility functions in `src/utils/common.ts`:
- `higherWin` and `lowerWin` to calculate scores based on point difference thresholds.
- `calculate` to determine the final score return value based on win/loss status.
