Entering the Insights overview fired every section's reads at once, about
two dozen requests on a seeded account, and the server worked through
them in a queue: the hero and the first sections waited behind trends,
the period review, cycle, signals, rhythm events, health status,
breathing, labs and ECG, all far below the fold.
The first three sections in the account's own order still mount with
the page. Every later one renders a 1 px sentinel until it comes within
400 px of the visible area of the shell's scroll container, then mounts
and fetches; once mounted it stays. Measured on a seeded account under a
4x CPU slowdown: 24 -> 13 requests on entry, the entry network span
1.3-1.8 s -> 0.5-0.9 s, LCP about 1.35 s -> 0.9 s, blocking time about
550 ms -> 200 ms. Scrolling to the end still loads all 25 and renders
all ten sections.
Specs that assert on, measure or scan the lower sections scroll them in
first through a shared helper, so their coverage is unchanged.
A journey on its own account switches mood and medications on, proves
the Mood nav entry, the Mood and Medications pills, the mood trends slot
and both add-menu entries are there, switches both off through the
module route and proves each is gone, the trends row fills from pulse,
/insights/mood shows the module notice at the same URL, and no chart on
the way paints its error state.
Marc-André Bombeck