Navigation destinations, the bottom bar's fixed slots and the tour stops
no longer carry their own module keys; each asks the surface map by its
href. Insights has no owner there, so switching AI analysis off leaves
the Insights entry, slot and tour stop in place.
The shell's page gate now resolves Insights sub-pages by slug as well
as top-level pages, so /insights/mood, /insights/medications and the
recovery metric pages show the module notice when their module is off,
worded from the access reason, with the Settings link only for the
record's own switch. The per-page redirect guard, the achievements
redirect and the nutrients page's own notice are gone; nothing
redirects any more.