Adds an "All dashboards" selector alongside the existing click-to-select
single-dashboard view. Selecting it stacks every dashboard vertically in
normal document flow, each preceded by a heading naming it, with no
fixed-height or scroll-clipping containers, so the browser's native print
function can render the full stack across pages.
Verified in-browser: single-dashboard editing still works unchanged, and
"All dashboards" renders all dashboards (including an empty one) stacked
with named separators; confirmed via computed layout that only the
pre-existing app-level scroll container grows to fit the content, with no
clipping container inside the Dashboards section itself.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XFUNZwCvz3kcod3352ZR2o
