Replaces PR #1433 unconditional JS display:none with a CSS @container query
that shows the chip only at composer-footer widths >= 1100px. JS now clears
inline style instead of setting display:none, so the CSS responsive cascade
is the single source of truth. Also removed inline style=\"display:none\" from
index.html so the CSS base rule provides the default-hidden state.
10 regression tests pin the base hide, wide-container show, narrow-container
hide (520px container query), mobile viewport hide (640px @media), JS does
not force display:none, JS clears inline style, /api/session/toolsets and
the dropdown machinery (toggleToolsetsDropdown, _populateToolsetsDropdown)
are preserved.
Refs #1431, #1433.
a6884ca40f
