The mount fixture always listed the session, so the case named "no list
summary" actually exercised a row proving non-blank. An omitSummaryRow
option drops the row, and the three cases now pin blank:false, an absent
row, and the summary-proven blank open.
The mount helper's 4th positional argument becomes an options object so a
test can set the session list row's blank flag independently of the
conversation snapshot's; the two new cases cover both branches of the
settling condition.
A summary-proven blank session can only land back on the hero, so the
settling phase (visibility:hidden composer seat) blanked the center
column for the whole history round-trip during startup auto-selection.
Exempt such sessions from settling and treat them as hero while loading.
ConversationSession seeds a stored draft in its own mount effect, and a parent's mount effect runs after its children's — so the unlock effect measured an empty mirror and never ran again for the draft that then appeared, leaving a restored long draft showing its head with the caret at its end. The effect now depends on the draft being non-empty; clearing on send and typing the first character flip it too, where both the focus and the reveal are no-ops. Pre-existing (the old geometry did not scroll for a programmatic value change either), fixed here because the reveal now exists.
Also from review: the golden's paste goes back to a block NOT ending in a newline, so the collapsed branch keeps a real engine under it while the standalone case owns the after-newline branch; the shared line-height rule names the reveal as its third consumer.
Address review of the ToolRow card refactor:
- ToolRow renders a visually-hidden run-state label (row.running/failed/stopped
locale keys) so a running/failed/interrupted row is not a colour-only signal;
the StateDot and the sweep are both aria-hidden. Restores the stopped-state
text assertion in diff-card.spec at the ToolRow layer.
- The file-link button stops Enter/Space from bubbling to DisclosureRow's
whole-row keydown, which would preventDefault the key and toggle expand
instead of opening the file (the keyboard analogue of the click stopPropagation).
- search-row passes output={model.output} unconditionally, matching the other
three card rows (ToolRow renders the card over the output when present).
- Assert locale: 'conversation' in the search/web/diff registration tests.
- Add the read render-intent paragraph to the ui-conversation README and a
ReadBlock atom entry + Read section to ui-primitives (both languages).
- Update the grep fixture sample lines to the post-refactor SearchRow shape.
Refresh the code-mode-round, steering, and search-card goldens for the added
status text and updated sample lines.
A caret straight after a newline is on a line with nothing to measure — the shape a trailing-newline draft ends in. chromium returns no client rects at all for the collapsed position (an all-zero box, which sent the reveal upward instead), firefox reports the line above, WebKit the right one. Measure the newline the caret just left and step one line down: all three then land on 649 of 652 with the caret's line at 315 inside the 336px box. The browser case now pastes a newline-terminated block, and fails 'expected 0 to be greater than 0' without the rule.
