Force one URL-matching mode app-wide for [cngxTabsRouteSync]. 'suffix' treats every tab as a leaf route, 'prefix' as a section
that stays active for URLs beneath it.
Reach for this only when the host-flavour default is wrong for your
app. Unset, a <cngx-tab-nav> matches by prefix and a
<cngx-tab-group> by suffix, which is what each markup implies; this
feature overrides both. Per-instance [match] still wins.