## Why
Switching reports reset their scroll positions, and resizing could pull users back to a selection they had deliberately scrolled away from. Small terminals also need room for usage details, while larger terminals can show more of the chart.
## What changed
- Retain independent scroll positions for each report, the dashboard, and help. Keep visible selections on screen during resizing while respecting manual scrolling.
- Hide plots in small report areas, expand charts to use available height, and place breakdown tables beside plots in wide focused reports.
- Highlight selected chat and plan rows with the shared picker style, preserving padding after wrapping.
- Show dated plan periods in the dashboard and collapse expanded plan details before closing with `Esc`.
## Testing
Add regression tests and snapshots for responsive layouts, reading-position restoration across tabs and help, selection visibility during resizing, and highlighted chat-row padding.
GitOrigin-RevId: e18a472ff4356324fed71e496f47762a7ccf657d
Eric Traut
d6d43270bd