NewsletterModal: link to /newsletter for the full pitch

Quick-access signup stays in the modal; a small "mehr erfahren" link
under the description sends anyone not ready to type an email straight
to /newsletter (testimonials, how-it-works) instead of only being
reachable via the Navbar — the same gap the blog's newsletter-fallback
card closed for readers, closed here for the modal's own audience.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013Eg6h91yngXmSnM51wxXM8

app/components/NewsletterModal.tsx

@@ -213,6 +213,20 @@ export function NewsletterModal({ open, onClose }: { open: boolean; onClose: ()
               Melde dich an und bekomme meine Sonntags-Impulse ab jetzt jede Woche direkt in dein Postfach: kurze Gedanken, praktische Impulse und kleine Anstöße für mehr Klarheit im Alltag.
             </p>
 
+            {/* Quick-access signup here, full pitch (Testimonials, "So
+                funktioniert's") one click away for anyone not ready to
+                type an email yet — same "lightweight modal vs. full page"
+                split this file's own top comment describes, just also
+                offering the other side of it from within the modal
+                itself instead of only via the Navbar. */}
+            <Link
+              href="/newsletter"
+              onClick={onClose}
+              className="text-label text-text-muted underline hover:text-brand transition-colors -mt-3"
+            >
+              Mehr über die wöchentlichen Impulse erfahren
+            </Link>
+
             {status === "success" ? (
               <p className="text-body text-text-primary font-medium">{successMessage}</p>
             ) : (