AnimatedOutlet keyed its motion container by the full pathname, so
navigating between params of the same route (e.g. the dashboard tabs
under /dashboard/$section) changed the key and remounted the route
component, discarding its in-memory state. The most visible symptom:
the dashboard time range resets to the default every time you switch
sub-tabs (Model Analytics / Flow / User Analytics).
Key the transition by the matched route id instead, so param-only
navigation re-renders in place while real page-to-page navigation
still plays the enter animation. This also preserves state across the
other $section tab pages (usage logs, models, system settings).
