The session list overflows after a handful of sessions, and its scrollbar
was drawn permanently in a column that is at rest most of the time.
SidebarRoot now tracks the pointer over the whole column and rebinds
ui-theme's scrollbar indirection pair to `transparent` while it is
outside, keeping the thumb for 2s after the pointer leaves so it does not
blink out on the way past. Rebinding colour leaves the list's
`scrollbar-gutter: stable` reservation in force, so revealing the bar
moves no row.
ui-theme's gate now states the widened contract: a rebind targets an -l2
token pair or `transparent`, and nothing else.
Making `.sources` a scroll container turned its `padding-left` from spacing
into a correctness constraint. A scroll container clips inline-start overflow
with no way to scroll it back, and `::marker` is right-aligned to the content
edge, so past nine sources the markers rendered as `0.` and `1.` where `10.`
and `11.` belonged.
`searchMaxResults` is an unbounded positive integer, so size the padding in
`em` against the list's own font to hold a three-digit marker. The browser e2e
measures a `999. ` marker in that inherited font and requires the computed
padding to be at least that wide, pinning the room against the widest marker
rather than one fixture's source count.
PR #1003 re-recorded this golden from a base that predated PR #1150, which
disables the branch control on any message that is not a completed turn's
tail. Both landed on master, whose CI skips the snapshot lane, so the
conflict only surfaces on PRs. The first message's control is now disabled
with its explanatory text.
jsdom resolves no CSS Modules layout and reports scrollHeight === clientHeight
for every element, so the unit test cannot witness the scroll the .sources
max-height produces. Drive it in the real browser instead.
The web-search-round search double now returns 12 provider results with a
title, snippet, and date each. That pins the seam's cap end to end for the
first time in a real composition — searchMaxResults keeps 8, the model-visible
text carries the kept titles and none of the dropped URLs, meta.truncated is
true — and 8 such rows overflow the 320px container. A case after the aria
golden expands the row and asserts 8 <li>, no button, the truncation
indicator, and computed max-height/overflow-y with scrollHeight > clientHeight.
The recorded stream and the aria golden are unchanged: replay is a positional
cursor over the fixture's chunks and the search double is a separate local
endpoint, while the card is collapsed at capture time.
