frontend polish: add reduced-motion support, dynamic copyright, missing animation keyframes

- LandingPageWrapper: Use dynamic year for copyright
- HeroSection: Add float-slow/float-slow-delayed keyframes, add prefers-reduced-motion media query
- TuxedoVideoHero: Add reduced-motion JS guard and CSS media query for accessibility

src/components/landing/HeroSection.tsx

@@ -998,6 +998,25 @@ export default function HeroSection() {
           66% { transform: translate(10px, -10px); }
         }
 
+        @keyframes float-slow {
+          0%, 100% { transform: translate(0, 0) scale(1); }
+          50% { transform: translate(25px, -30px) scale(1.02); }
+        }
+
+        @keyframes float-slow-delayed {
+          0%, 100% { transform: translate(0, 0) scale(1); }
+          50% { transform: translate(-30px, 20px) scale(1.03); }
+        }
+
+        @media (prefers-reduced-motion: reduce) {
+          .parallax-float,
+          .parallax-float *,
+          [class*="animate-"] {
+            animation: none !important;
+            transition: none !important;
+          }
+        }
+
         @keyframes draw-route {
           to { stroke-dashoffset: 0; }
         }