Add date/week filtering and regenerate command to CLI
- Add -d/--date flag for single day filtering (supports 'today', 'yesterday')
- Add -w/--week flag for week filtering (supports 'thisweek', 'lastweek')
- Add 'regenerate' command to regenerate daily summaries
- Use --force with regenerate to redo all summaries
đ¤ Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>