## Why
Reading daily totals required selecting each bar, and changing grouping required opening a picker. Section navigation could shift vertically, while scroll hints appeared even when content fit.
## What changed
- Make `g` cycle through available groupings and summary views directly.
- Show daily totals on charts spanning up to seven days when space permits, prioritizing the selected value and keeping neighboring labels separate.
- Keep section navigation at a stable height, show more legend rows in taller maximized reports, and move their update timestamp into the footer.
- Hide scroll hints when content fits, including an exact fit, and show only the active summary view label.
## Testing
Add regression tests and snapshots for seven-day totals, narrow label spacing, grouping wraparound and server capabilities, configured `g` navigation in ungrouped sections, stable tab placement, adaptive legends, footer timestamps, and overflow-dependent scroll hints.
GitOrigin-RevId: 9d14f314b4a22ca2d926f0e69c6b89e4f9c8550d
de40696ec4