chore: remove Next.js dependencies and update UI components with standard React

src/components/ui/FadeIn.tsx

@@ -0,0 +1,28 @@
+'use client'
+
+import { motion, type Transition } from 'framer-motion'
+import React from 'react'
+import { useMediaQuery } from '@/hooks/useMediaQuery'
+
+type FadeInProps = {
+  children: React.ReactNode
+  transition?: Transition
+  className?: string
+}
+
+export function FadeIn({ children, transition, className }: FadeInProps) {
+  const isMobile = useMediaQuery('(max-width: 768px)')
+
+  return (
+    <motion.div
+      className={className}
+      initial={{ opacity: 0, y: 20 }}
+      whileInView={{ opacity: 1, y: 0 }}
+      viewport={{ once: false, margin: isMobile ? '0px 0px -50px 0px' : '0px 0px -100px 0px' }}
+      transition={transition || { duration: 0.5 }}
+    >
+      {children}
+    </motion.div>
+  )
+}
+