feat: monochrome black & white rebrand + new Pudu robots

- Convert site from royal-blue theme to black/white monochrome (desaturate
  all blue-hued colors; keep WhatsApp green and error red)
- Swap blue circular brand logo for mono YS mark; regenerate favicon/PWA icons
- Add 6 Pudu robots (CC1 Pro, MT1 Max, MT1 Vac, T600, T600 Underride, BG1 Pro)
- Fix favicon.ico to RGBA (Next 16 Turbopack decode) and Stripe apiVersion type

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/app/contact/page.tsx

@@ -21,7 +21,7 @@ export default function ContactPage() {
             <h1 style={{ margin: 0, fontSize: 'clamp(2rem, 5vw, 3.2rem)', fontWeight: 300, lineHeight: 1.05, letterSpacing: '-0.03em' }}>
               <span className="text-gradient" style={{ fontWeight: 500 }}>Talk to our Dubai robotics team.</span>
             </h1>
-            <p style={{ margin: 0, color: '#DEE0F0', fontSize: 'clamp(0.95rem, 2vw, 1.05rem)', lineHeight: 1.7 }}>
+            <p style={{ margin: 0, color: '#e7e7e7', fontSize: 'clamp(0.95rem, 2vw, 1.05rem)', lineHeight: 1.7 }}>
               Tell us about your venue, timeline, and use case. We will recommend a robot, share availability, and book a live demo at our Dubai showroom.
             </p>
 
@@ -60,13 +60,13 @@ function ContactRow({ label, value, href, external = false }: { label: string; v
         alignItems: 'center',
         gap: '1rem',
         padding: '0.75rem 0',
-        borderBottom: '1px solid rgba(39, 63, 148,0.1)',
+        borderBottom: '1px solid rgba(94, 94, 94, 0.1)',
         textDecoration: 'none',
-        color: '#FBFBFD',
+        color: '#fcfcfc',
       }}
     >
-      <span style={{ fontSize: '0.7rem', letterSpacing: '0.22em', textTransform: 'uppercase', color: '#8891C7' }}>{label}</span>
-      <span style={{ fontSize: '0.95rem', color: '#FBFBFD', textAlign: 'right' }}>{value}</span>
+      <span style={{ fontSize: '0.7rem', letterSpacing: '0.22em', textTransform: 'uppercase', color: '#a8a8a8' }}>{label}</span>
+      <span style={{ fontSize: '0.95rem', color: '#fcfcfc', textAlign: 'right' }}>{value}</span>
     </a>
   );
 }