improvise-jq8l. `web/app.js` called `scrollIntoView` NOWHERE, so a selection
moved past the bottom of `#grid` stayed there, invisible, with no way back but
scrolling by hand.
What the ticket did not predict: this is NOT a projection bug and NOT a
`row_offset` bug, and the acceptance criteria's talk of reconciling the absolute
selection against the announced window describes work `render.rs` already does.
The row had been sent. `#grid` has `overflow: auto`, `ROW_PX`/`COL_PX`
UNDER-estimate (a real row measures 28.6px against the assumed 26) and inline
group rows are deliberately not charged for at all, so the page renders more rows
than its own box can show and the overflow is the DOM's. `block: "nearest"` is
the whole option: it scrolls only when the element is out of view, and it scrolls
the nearest container rather than the document.
The expensive half was the fixture. Neither shipped document can reach the state
— `web/demo.improv` is four rows, `harness/fixtures/grouped.improv` is eight, and
a probe measured BOTH at `scrollHeight === clientHeight` in a 484px box. The
assertion would have passed against a page that never scrolls, which is why the
spec asserts the overflow exists before it presses a key.
`harness/fixtures/tall.improv` is thirty rows in three groups; measured against
the unfixed page it gives 105px of overflow with the selected cell 96px below the
visible bottom and `scrollTop` still 0.
Tests: 25 chromium harness (was 24), Rust and node unchanged.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FC2jVn8Au7E9JPkw6bwXXH
web/demo.improv has no groups and one category per visible axis, deliberately
(gotcha 46), so the multi-level header, the group span, the collapse indicator
and the inline group row -- exactly the code improvise-anr9 added -- had never
been rendered anywhere a test could see (improvise-plcx).
harness/fixtures/grouped.improv is served beside the shipped demo by
harness/build.sh; web/demo.improv is untouched. Two categories on each visible
axis, three row groups with one collapsed, two column groups.
A missing seed is NOT an error -- web/worker.js answers a 404 with an empty
model -- so every assertion is about labels the fixture really carries, never
that a grid exists.
Five injections, five distinct failures, patched in harness/serve so no
rebuild stands between the fault and the run: slash-joining the level tuples;
colSpan = 1 on the group headers; a stray cell on the inline group row;
indicator(false) hard-coded; and the collapse removed from the document.
One thing the ticket did not predict: the row frame's FIRST group header is
never drawn, so the spec asserts two group rows where the document has three,
with improvise-0o6x named on the line.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FC2jVn8Au7E9JPkw6bwXXH
Claude (agent-hier)