Retires Support/donation/tiers page in favor of simple configurable link

src/app/about/about.component.html

@@ -74,6 +74,7 @@
     }
 
     <!-- Donation CTA -->
+    @if (config().donation_url) {
     <div class="about-cta">
       <div class="about-flower-divider" aria-hidden="true">
         <img [src]="resolveImageUrl(config().logo_url)" alt="">
@@ -84,7 +85,8 @@
         signal strong. Members receive exclusive perks and the satisfaction of
         knowing they helped make this possible.
       </p>
-      <a routerLink="/donate" class="btn">Join the Station</a>
+      <a [href]="config().donation_url" target="_blank" rel="noopener noreferrer" class="btn">Join the Station</a>
     </div>
+    }
   </div>
 </section>