feat: optimize performance and SEO, integrate Lighthouse CI

- Integrated imgproxy for centralized image optimization
- Implemented Lighthouse CI in Gitea pipeline with native Chromium
- Reached 100/100 SEO score by fixing canonicals, hreflang, and link text
- Optimized LCP by forcing Hero component visibility until hydration
- Decoupled analytics into an async shell to reduce TTI

components/home/Hero.tsx

@@ -130,19 +130,19 @@ const containerVariants = {
   visible: {
     opacity: 1,
     transition: {
-      staggerChildren: 0.12,
-      delayChildren: 0.4,
+      staggerChildren: 0.1,
+      delayChildren: 0.1,
     },
   },
 } as const;
 
 const headingVariants = {
-  hidden: { opacity: 0, y: 60, scale: 0.85 },
+  hidden: { opacity: 1, y: 30, scale: 0.95 },
   visible: {
     opacity: 1,
     y: 0,
     scale: 1,
-    transition: { duration: 1.2, ease: [0.25, 0.46, 0.45, 0.94] },
+    transition: { duration: 0.8, ease: [0.25, 0.46, 0.45, 0.94] },
   },
 } as const;