Fix sponsor logo paths and remove Veure productes CTA

- Footer: use processed transparent PNGs (finques-prats.png, runners-corbins.png, ajuntament-de-corbins.png)
- Remove Veure productes scroll button from page.tsx

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/app/page.tsx

@@ -760,18 +760,6 @@ export default function HomePage() {
 
         <TrustSection />
 
-        {/* CTA if nothing selected yet */}
-        {!selectedProduct && (
-          <div className="text-center py-8 pb-16">
-            <button
-              onClick={() => document.getElementById('productes')?.scrollIntoView({ behavior: 'smooth' })}
-              className="flex items-center gap-2 mx-auto text-teal hover:text-white transition-colors text-sm"
-            >
-              <ChevronDown size={18} className="animate-bounce" />
-              Veure productes
-            </button>
-          </div>
-        )}
       </main>
 
       <Footer />

src/components/Footer.tsx

@@ -19,7 +19,7 @@ export default function Footer() {
             style={{ background: '#ffffff', borderRadius: '16px', display: 'flex', alignItems: 'center', justifyContent: 'center', padding: '16px 32px', boxShadow: '0 2px 8px rgba(0,0,0,0.15)' }}
           >
             <Image
-              src="/assets/Finques Prats Logo.png"
+              src="/assets/finques-prats.png"
               alt="Finques Prats"
               width={180}
               height={65}
@@ -40,7 +40,7 @@ export default function Footer() {
             style={{ background: '#ffffff', borderRadius: '16px', display: 'flex', alignItems: 'center', justifyContent: 'center', padding: '14px 24px', boxShadow: '0 2px 8px rgba(0,0,0,0.15)', width: '170px', height: '80px' }}
           >
             <Image
-              src="/assets/runners-corbins.webp"
+              src="/assets/runners-corbins.png"
               alt="Corbins Runners"
               width={130}
               height={60}
@@ -54,7 +54,7 @@ export default function Footer() {
             style={{ background: '#ffffff', borderRadius: '16px', display: 'flex', alignItems: 'center', justifyContent: 'center', padding: '14px 24px', boxShadow: '0 2px 8px rgba(0,0,0,0.15)', width: '170px', height: '80px' }}
           >
             <Image
-              src="/assets/ajuntament-de-corbins.webp"
+              src="/assets/ajuntament-de-corbins.png"
               alt="Ajuntament de Corbins"
               width={110}
               height={60}