Generate Muster-Widerrufsformular PDF live from company-settings instead of a static upload

The "An:" address used to be baked into a hand-crafted PDF and silently
went stale whenever an admin updated the Impressum's Anbieterdaten
without also re-exporting/re-uploading the file by hand — exactly what
happened 2026-07-29. New /api/muster-widerrufsformular route renders it
on-the-fly via @react-pdf/renderer using the same getCompanySettings()
data as AnbieterAngaben.tsx's Impressum block, so the two can never drift
apart again. Disables react-pdf's default hyphenation, which otherwise
split the seller's email address mid-word to fit the line.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

app/widerruf/page.tsx

@@ -75,14 +75,19 @@ export default async function WiderrufPage() {
               <p className="text-body text-text-muted">Inhalte werden gerade aktualisiert.</p>
             )}
 
-            {page?.attachment && (
-              <a
-                href={page.attachment.url}
-                target="_blank"
-                rel="noopener noreferrer"
-                download
-                className="group flex items-center gap-5 bg-bg-muted hover:bg-bg-white border border-border rounded-md p-6 transition-colors"
-              >
+            {/* Generated live from company-settings (/api/muster-widerrufsformular)
+                instead of the CMS attachment field — see that route's own
+                comment on why: the static uploaded PDF's "An:" address
+                silently went stale whenever an admin updated the
+                Impressum's Anbieterdaten without also re-exporting this
+                file by hand. */}
+            <a
+              href="/api/muster-widerrufsformular"
+              target="_blank"
+              rel="noopener noreferrer"
+              download="Muster-Widerrufsformular.pdf"
+              className="group flex items-center gap-5 bg-bg-muted hover:bg-bg-white border border-border rounded-md p-6 transition-colors"
+            >
                 <div className="flex size-12 shrink-0 items-center justify-center rounded-sm bg-bg-white border border-border text-brand">
                   <svg viewBox="0 0 24 24" className="size-6" fill="none" aria-hidden="true">
                     <path
@@ -103,7 +108,7 @@ export default async function WiderrufPage() {
                 </div>
                 <div className="flex flex-col gap-0.5 flex-1 min-w-0">
                   <p className="font-semibold text-body text-text-primary">
-                    {page.attachment.title || "Muster-Widerrufsformular (PDF)"}
+                    Muster-Widerrufsformular (PDF)
                   </p>
                   <p className="text-body-sm text-text-muted">Herunterladen</p>
                 </div>
@@ -116,7 +121,6 @@ export default async function WiderrufPage() {
                   <path d="M12 4v13m0 0-5-5m5 5 5-5M5 21h14" stroke="currentColor" strokeWidth="1.75" strokeLinecap="round" strokeLinejoin="round" />
                 </svg>
               </a>
-            )}
           </div>
         </div>