The page had grown to ~20 stacked panels on one very long scroll - the same problem
already fixed twice this session for Settings and Event Manager. Grouped into 5 tabs
(Getting started, Create a race, Run a race, Training & results, Video guides) using
the same activeGuideTab-as-module-state approach so the selection survives an in-place
re-render (e.g. a language switch). The always-visible overview cards at the top are
unchanged.
Also investigated a "feels slow" concern raised alongside this: measured the page's
actual render cost in a real browser (median 0.6ms, on par with or faster than Settings/
Timing) and confirmed the periodic tickClock/updateSyncStatus intervals never re-render
an idle Guide page. No performance issue found - the perceived slowness was the page's
length, which this change addresses directly.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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