* fix: size DataView list columns by the table's own width
The list grid was built from every column, so columns hidden below md/lg
left empty tracks and the visible cells landed under the wrong headers.
Each width now gets a template of only its visible columns (CSS variables
+ container queries on the table, so a narrow panel counts, not the window),
the header uses the same gap as the rows, and rows use a minimum height so
wrapped cells no longer overlap.
* test: wait for the title bar offset effect before asserting
The bar shows once getTitleBarVisible resolves, but --termix-titlebar-height
is set in a later passive effect, so reading it right after findByText raced
(3-5 of 40 runs under load, on main too).
* chore: rerun CI against dev-26.10.6
