Stage 4 of the GUI layout plan (F11, F12).
History: the cell callback copied and sorted the whole event list on every
call, and a full-window Refresh issues one call per visible cell — 126 sorts
of a 300-element slice per redraw, measured. The sorted snapshot now lives in
`rows`, refilled by `resort()` at build time, on a sort toggle, and from
`refresh()`. The length callback moves to `len(rows)` with it: cells and the
row count have to read the same slice, which was only incidentally true while
each cell re-derived the order for itself. The column captions become a
package-level array instead of a slice reallocated per header update, and the
per-cell `TextStyle`/`Refresh()` pair goes — the template already carries the
zero style and `SetText` refreshes.
Jobs: `refreshView()` already re-reads the service snapshot and refreshes the
list, so the six `list.Refresh()` calls that preceded it, and the duplicate
`syncFromService()` in the pause handler, were redundant. The folder filter's
early-return path never reaches `refreshView()`, so its `list.Refresh()` moves
into that branch rather than being deleted.
Both changes carry regression tests, each verified to fail against the
behaviour it guards: `TestHistorySortToggleKeepsRowsInSync` for the
cache-versus-length hazard, `TestToolbarButtonRedrawsRowAndDetails` for the
handlers that now rely on `refreshView` alone.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Replace CODE_REVIEW.md with a living maturity checklist, document
session-only History, inject Service into newMainView for testability,
add UI and scheduler regression tests, and fix RunNow error surfacing
plus empty jobs view handling.
Co-authored-by: Cursor <cursoragent@cursor.com>
mixeme