fix: reposition WhatsApp floating button to avoid overlapping chat widget

root.jsx already renders a support chat FAB at bottom:24px/right:24px;
place the WhatsApp button beside it instead of underneath.

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

app/components/WhatsAppButton.jsx

@@ -46,9 +46,9 @@ export function WhatsAppFloatingButton() {
       style={{
         position: 'fixed',
         bottom: '24px',
-        right: '24px',
+        right: '92px',
-        width: '56px',
+        width: '54px',
-        height: '56px',
+        height: '54px',
         borderRadius: '50%',
         background: '#25D366',
         display: 'flex',