SearchOverlay was rendered as a <header> descendant, so the header's
conditional backdrop-blur-md (once scrolled) made it the containing
block for the overlay's fixed positioning, clipping the opaque
background to the header's height and letting page content show
through underneath. Now rendered as a header sibling, same pattern
already used for NewsletterModal.
Blog category chips are now a client component gating navigation
behind useTransition, disabling the chips while a navigation is
pending so rapid clicks can't fire overlapping RSC navigations that
commit out of order and briefly show an empty result.
Marco
e49dacf057