Adds a -m/--minutes flag to `streamd timesheet` that displays time
in HH:MM format (e.g., 8:30) instead of decimal hours (e.g., 8.5h).
Includes unit tests for both formatting functions.
Add tests for:
- @Done insertion at various line positions
- Future task filtering with show_future flag
- Task sorting by moment ascending
- Error message formatting for all new error variants
- Trailing newline preservation
Implement smoother todo editing with the following features:
- Display numbered tasks [1], [2], etc. in `streamd todo`
- Add `streamd todo N edit` to open editor at task line
- Add `streamd todo N done` to insert @Done after @Task
- Add `--show-future` flag to include future tasks (hidden by default)
Replace CSV output with formatted table display showing:
- Monthly breakdown with expected/actual hours per day
- Day types (Regular, Sick Leave, Vacation, Holiday, Flex Day, etc.)
- Warning indicators for missing days and overlapping timecards
- Monthly summaries with total expected/actual hours
- Cumulative balance across all months
- Detailed warnings section at the end
Shows helpful message when no .streamd.toml configuration is found.
