TrustRow: flex-wrap instead of a hard lg: breakpoint; sticky modal close button

TrustRow now uses flex-wrap + justify-center so badges flow as many
per row as actually fit at the current width, wrapping (and
auto-centering, a native flexbox behavior for the last wrapped line)
instead of needing a breakpoint or risking overflow. Replaces the
earlier lg:-only structural exception entirely.

NewsletterModal's close button was absolutely positioned inside the
dialog's own scrolling container, so it scrolled away with the
content. Switched to sticky (top-6, ml-auto for horizzontal position,
-mb-6 to cancel its own height so it doesn't push content down) so it
stays pinned to the top-right corner while scrolling.

app/components/NewsletterModal.tsx

@@ -156,12 +156,23 @@ export function NewsletterModal({ open, onClose }: { open: boolean; onClose: ()
             // takes over once the 2-column split itself starts at lg:.
             className="relative bg-bg-base rounded-md overflow-hidden w-full max-w-[36rem] lg:max-w-[75rem] max-h-[90vh] overflow-y-auto"
           >
+        {/* sticky, not absolute — the dialog itself is the scrolling
+            container (overflow-y-auto above), so an absolute-positioned
+            child scrolls away with the rest of the content instead of
+            staying pinned to the visible top-right corner (reported
+            2026-07-29). sticky top-6 keeps it fixed to the scrolled
+            viewport's top edge; ml-auto pushes it to the right within
+            the dialog's normal block flow (sticky positioning doesn't
+            use right-* the way absolute does); -mb-6 cancels its own
+            height (size-6 = 1.5rem) so it doesn't push the modal-top
+            content below it down — same visual overlap as the old
+            absolute positioning, just still visible after scrolling. */}
         <button
           ref={closeButtonRef}
           type="button"
           onClick={onClose}
           aria-label="Schließen"
-          className="absolute top-6 right-6 z-10 size-6 flex items-center justify-center active:scale-90 transition-transform"
+          className="sticky top-6 ml-auto mr-6 -mb-6 z-20 size-6 flex items-center justify-center active:scale-90 transition-transform"
         >
           <Image alt="" src="/icon-close.png" width={24} height={24} className="size-full object-contain" />
         </button>