Closes both open "Documentation maintenance" roadmap items. Used a research-only
Explore pass to get a concrete diff against the actual code before editing, rather
than guessing what was stale.
Documented: src/track_layouts_logic.js (previously unmentioned anywhere),
buildEventSchedule, the Settings/Event Manager tab layouts, new state fields
(raceConfig.scheduleStartAt/scheduleGapMin, Session.trackLayoutId, top-level
trackLayouts/audioEventLog), a real SQLite table contract section, a full
field-by-field Settings shape, several previously-undocumented backend routes,
and the complete list of files tests/browser_smoke.js actually invokes.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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