perf: remove framer-motion and lucide-react from critical path

- Remove framer-motion from Hero.tsx and HeaderClient.tsx, replace with CSS animations/transitions
- Replace lucide-react icons (Menu, X, Mail) with inline SVGs in HeaderClient.tsx
- Lazy-load About, Projects, Contact, Footer via dynamic() imports in ClientWrappers.tsx
- Defer ShaderGradient/BackgroundBlobs loading via requestIdleCallback in ClientProviders.tsx
- Remove AnimatePresence page wrapper that caused full re-renders
- Enable experimental.optimizeCss (critters) for critical CSS inlining
- Add fadeIn keyframe to Tailwind config for CSS-based animations

Homepage JS reduced from 563KB to 438KB (-125KB).
Eliminates ~39s main thread work from WebGL init and layout thrashing.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

app/components/HeaderClient.tsx

@@ -1,13 +1,22 @@
 "use client";
 
 import { useState, useEffect } from "react";
-import { motion, AnimatePresence } from "framer-motion";
-import { Menu, X, Mail } from "lucide-react";
 import { SiGithub, SiLinkedin } from "react-icons/si";
 import Link from "next/link";
 import { usePathname, useSearchParams } from "next/navigation";
 import type { NavTranslations } from "@/types/translations";
 
+// Inline SVG icons to avoid loading the full lucide-react chunk (~116KB)
+const MenuIcon = ({ size = 24 }: { size?: number }) => (
+  <svg xmlns="http://www.w3.org/2000/svg" width={size} height={size} viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><line x1="4" x2="20" y1="12" y2="12"/><line x1="4" x2="20" y1="6" y2="6"/><line x1="4" x2="20" y1="18" y2="18"/></svg>
+);
+const XIcon = ({ size = 24 }: { size?: number }) => (
+  <svg xmlns="http://www.w3.org/2000/svg" width={size} height={size} viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><path d="M18 6 6 18"/><path d="m6 6 12 12"/></svg>
+);
+const MailIcon = ({ size = 20 }: { size?: number }) => (
+  <svg xmlns="http://www.w3.org/2000/svg" width={size} height={size} viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><rect width="20" height="16" x="2" y="4" rx="2"/><path d="m22 7-8.97 5.7a1.94 1.94 0 0 1-2.06 0L2 7"/></svg>
+);
+
 interface HeaderClientProps {
   locale: string;
   translations: NavTranslations;
@@ -44,7 +53,7 @@ export default function HeaderClient({ locale, translations }: HeaderClientProps
       href: "https://linkedin.com/in/dkonkol",
       label: "LinkedIn",
     },
-    { icon: Mail, href: "mailto:contact@dk0.dev", label: "Email" },
+    { icon: MailIcon, href: "mailto:contact@dk0.dev", label: "Email" },
   ];
 
   const pathWithoutLocale = pathname.replace(new RegExp(`^/${locale}`), "") || "";
@@ -55,53 +64,38 @@ export default function HeaderClient({ locale, translations }: HeaderClientProps
 
   return (
     <>
-      <motion.header
-        initial={false}
-        animate={{ y: 0, opacity: 1 }}
-        transition={{ duration: 0.3, ease: "easeOut" }}
-        className="fixed top-6 left-0 right-0 z-50 flex justify-center px-4 pointer-events-none"
-      >
+      <header className="fixed top-6 left-0 right-0 z-50 flex justify-center px-4 pointer-events-none">
         <div
           className={`pointer-events-auto transition-all duration-500 ease-out ${
             scrolled ? "w-full max-w-5xl" : "w-full max-w-7xl"
           }`}
         >
-          <motion.div
-            initial={false}
-            animate={{ opacity: 1, y: 0 }}
-            transition={{ duration: 0.3, ease: "easeOut" }}
+          <div
             className={`backdrop-blur-xl transition-all duration-500 flex justify-between items-center ${
               scrolled
                 ? "bg-white/95 border border-stone-200/50 shadow-[0_8px_30px_rgba(0,0,0,0.12)] rounded-full px-6 py-3"
                 : "bg-white/85 border border-stone-200/30 shadow-[0_4px_24px_rgba(0,0,0,0.08)] px-4 py-4 rounded-full"
             }`}
           >
-            <motion.div
-              whileHover={{ scale: 1.05 }}
-              className="flex items-center space-x-2"
-            >
+            <div className="flex items-center space-x-2 hover:scale-105 transition-transform">
               <Link
                 href={`/${locale}`}
                 className="text-2xl font-black font-sans text-stone-900 tracking-tighter liquid-hover flex items-center"
               >
                 dk<span className="text-red-500">0</span>
               </Link>
-            </motion.div>
+            </div>
 
             <nav className="hidden md:flex items-center space-x-8">
               {navItems.map((item) => (
-                <motion.div
-                  key={item.name}
-                  whileHover={{ y: -2 }}
-                  whileTap={{ scale: 0.95 }}
-                >
+                <div key={item.name} className="hover:-translate-y-0.5 active:scale-95 transition-all">
                   <Link
                     href={item.href}
                     className="text-stone-700 hover:text-stone-900 font-medium transition-colors relative liquid-hover"
                   >
                     {item.name}
                   </Link>
-                </motion.div>
+                </div>
               ))}
 
               {/* Language Switcher */}
@@ -129,121 +123,109 @@ export default function HeaderClient({ locale, translations }: HeaderClientProps
               </div>
             </nav>
 
-            <motion.button
-              whileHover={{ scale: 1.05, rotate: 90 }}
-              whileTap={{ scale: 0.95 }}
+            <button
               onClick={() => setIsOpen(!isOpen)}
-              className="md:hidden p-2 rounded-lg bg-stone-100 hover:bg-stone-200 text-stone-700 transition-colors"
+              className="md:hidden p-2 rounded-lg bg-stone-100 hover:bg-stone-200 text-stone-700 transition-all hover:scale-105 active:scale-95"
               aria-label="Toggle menu"
             >
-              {isOpen ? <X size={24} /> : <Menu size={24} />}
-            </motion.button>
-          </motion.div>
+              {isOpen ? <XIcon size={24} /> : <MenuIcon size={24} />}
+            </button>
+          </div>
         </div>
-      </motion.header>
+      </header>
 
-      <AnimatePresence>
-        {isOpen && (
-          <motion.div
-            initial={{ opacity: 0 }}
-            animate={{ opacity: 1 }}
-            exit={{ opacity: 0 }}
-            transition={{ duration: 0.2 }}
-            className="fixed inset-0 bg-stone-900/50 backdrop-blur-sm z-40 md:hidden"
-            onClick={() => setIsOpen(false)}
-          />
-        )}
-      </AnimatePresence>
+      {/* Mobile menu overlay */}
+      <div
+        className={`fixed inset-0 bg-stone-900/50 backdrop-blur-sm z-40 md:hidden transition-opacity duration-200 ${
+          isOpen ? "opacity-100" : "opacity-0 pointer-events-none"
+        }`}
+        onClick={() => setIsOpen(false)}
+      />
 
-      <AnimatePresence>
-        {isOpen && (
-          <motion.div
-            initial={{ x: "100%", opacity: 0 }}
-            animate={{ x: 0, opacity: 1 }}
-            exit={{ x: "100%", opacity: 0 }}
-            transition={{ type: "spring", damping: 30, stiffness: 300 }}
-            className="fixed right-0 top-0 h-full w-80 bg-white shadow-2xl z-50 md:hidden overflow-y-auto"
-          >
-            <div className="p-6">
-              <div className="flex justify-between items-center mb-8">
-                <Link
-                  href={`/${locale}`}
-                  className="text-2xl font-black text-stone-900"
-                  onClick={() => setIsOpen(false)}
-                >
-                  dk<span className="text-red-500">0</span>
-                </Link>
-                <button
-                  onClick={() => setIsOpen(false)}
-                  className="p-2 rounded-lg bg-stone-100 hover:bg-stone-200 text-stone-700"
-                  aria-label="Close menu"
-                >
-                  <X size={24} />
-                </button>
-              </div>
+      {/* Mobile menu panel */}
+      <div
+        className={`fixed right-0 top-0 h-full w-80 bg-white shadow-2xl z-50 md:hidden overflow-y-auto transition-transform duration-300 ease-out ${
+          isOpen ? "translate-x-0" : "translate-x-full"
+        }`}
+      >
+        <div className="p-6">
+          <div className="flex justify-between items-center mb-8">
+            <Link
+              href={`/${locale}`}
+              className="text-2xl font-black text-stone-900"
+              onClick={() => setIsOpen(false)}
+            >
+              dk<span className="text-red-500">0</span>
+            </Link>
+            <button
+              onClick={() => setIsOpen(false)}
+              className="p-2 rounded-lg bg-stone-100 hover:bg-stone-200 text-stone-700"
+              aria-label="Close menu"
+            >
+              <XIcon size={24} />
+            </button>
+          </div>
 
-              <nav className="space-y-2">
-                {navItems.map((item) => (
-                  <Link
-                    key={item.name}
-                    href={item.href}
-                    onClick={() => setIsOpen(false)}
-                    className="block px-4 py-3 text-stone-700 hover:bg-stone-50 rounded-lg font-medium transition-colors"
+          <nav className="space-y-2">
+            {navItems.map((item) => (
+              <Link
+                key={item.name}
+                href={item.href}
+                onClick={() => setIsOpen(false)}
+                className="block px-4 py-3 text-stone-700 hover:bg-stone-50 rounded-lg font-medium transition-colors"
+              >
+                {item.name}
+              </Link>
+            ))}
+          </nav>
+
+          {/* Language Switcher Mobile */}
+          <div className="flex gap-2 mt-6 pt-6 border-t border-stone-200">
+            <Link
+              href={enHref}
+              onClick={() => setIsOpen(false)}
+              className={`flex-1 px-4 py-2 text-center font-medium rounded-lg transition-all ${
+                locale === "en"
+                  ? "bg-stone-900 text-white"
+                  : "bg-stone-100 text-stone-600 hover:bg-stone-200"
+              }`}
+            >
+              EN
+            </Link>
+            <Link
+              href={deHref}
+              onClick={() => setIsOpen(false)}
+              className={`flex-1 px-4 py-2 text-center font-medium rounded-lg transition-all ${
+                locale === "de"
+                  ? "bg-stone-900 text-white"
+                  : "bg-stone-100 text-stone-600 hover:bg-stone-200"
+              }`}
+            >
+              DE
+            </Link>
+          </div>
+
+          <div className="mt-8 pt-6 border-t border-stone-200">
+            <div className="flex justify-center space-x-6">
+              {socialLinks.map((link) => {
+                const Icon = link.icon;
+                return (
+                  <a
+                    key={link.label}
+                    href={link.href}
+                    target="_blank"
+                    rel="noopener noreferrer"
+                    className="p-3 rounded-lg bg-stone-100 hover:bg-stone-900 hover:text-white text-stone-700 transition-all"
+                    aria-label={link.label}
                   >
-                    {item.name}
-                  </Link>
-                ))}
-              </nav>
-
-              {/* Language Switcher Mobile */}
-              <div className="flex gap-2 mt-6 pt-6 border-t border-stone-200">
-                <Link
-                  href={enHref}
-                  onClick={() => setIsOpen(false)}
-                  className={`flex-1 px-4 py-2 text-center font-medium rounded-lg transition-all ${
-                    locale === "en"
-                      ? "bg-stone-900 text-white"
-                      : "bg-stone-100 text-stone-600 hover:bg-stone-200"
-                  }`}
-                >
-                  EN
-                </Link>
-                <Link
-                  href={deHref}
-                  onClick={() => setIsOpen(false)}
-                  className={`flex-1 px-4 py-2 text-center font-medium rounded-lg transition-all ${
-                    locale === "de"
-                      ? "bg-stone-900 text-white"
-                      : "bg-stone-100 text-stone-600 hover:bg-stone-200"
-                  }`}
-                >
-                  DE
-                </Link>
-              </div>
-
-              <div className="mt-8 pt-6 border-t border-stone-200">
-                <div className="flex justify-center space-x-6">
-                  {socialLinks.map((link) => {
-                    const Icon = link.icon;
-                    return (
-                      <a
-                        key={link.label}
-                        href={link.href}
-                        target="_blank"
-                        rel="noopener noreferrer"
-                        className="p-3 rounded-lg bg-stone-100 hover:bg-stone-900 hover:text-white text-stone-700 transition-all"
-                        aria-label={link.label}
-                      >
-                        <Icon size={20} />
-                      </a>
-                    );
-                  })}
-                </div>
-              </div>
+                    <Icon size={20} />
+                  </a>
+                );
+              })}
             </div>
-          </motion.div>
-        )}
-      </AnimatePresence>
+          </div>
+        </div>
+      </div>
     </>
   );
 }