fix: Switch to standard PayPal donation URL format

Author: willbearfruits

components/DonationButton.tsx

@@ -6,7 +6,7 @@ export default function DonationButton() {
 
   const handleDonate = () => {
     // Direct PayPal payment link with email
-    window.open('https://www.paypal.com/paypalme/dogme84', '_blank');
+    window.open('https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=dogme84@gmail.com&item_name=AlphaForge+Knob+Modeler&currency_code=USD', '_blank');
   };
 
   if (!visible) return null;

public-site/index.html

@@ -240,7 +240,7 @@ <h3>⚡ Instant Export</h3>
             View on GitHub
         </a>
 
-        <a href="https://www.paypal.com/paypalme/dogme84" target="_blank" class="btn btn-coffee" style="margin-left: 1rem;">
+        <a href="https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=dogme84@gmail.com&item_name=AlphaForge+Knob+Modeler&currency_code=USD" target="_blank" class="btn btn-coffee" style="margin-left: 1rem;">
             ☕ Buy me a coffee
         </a>
     </div>