Logs with errors now open already smart-folded — every entry within
±25 of an error stays visible, gaps collapse into draggable bars.
Folds can only be expanded individually via per-bar click or
drag; the previous "toggle to unfold everything" path is gone. The
header error-count chip becomes informational only (cursor and
pointer-events stripped so it no longer reads as interactive).
Removed the dead toggleErrors / uncollapseAllErrors / "toggled"
state plumbing.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>