Declare every dashboard key as a Binding on the widget that owns it, and
generate the footer, activity tool chips and help screen from those
bindings so they cannot drift. The footer collapses to "? help · q quit"
under 80x24.
Add Home/End and PgUp/PgDn (one week) navigation, mouse-wheel selection on
the graphs, click-to-focus on every panel, and clickable footer chips.
Tab and Shift+Tab now visit only the dashboard panels.
