feat: complete UI overhaul (liquid glass theme, i18n, FontAwesome)

src/components/CopyButton.tsx

@@ -1,5 +1,6 @@
 import { useState } from 'react';
-import { Check, Copy } from 'lucide-react';
+import { FontAwesomeIcon } from "@fortawesome/react-fontawesome";
+import { faCheck, faCopy } from "@fortawesome/free-solid-svg-icons";
 
 interface CopyButtonProps {
   value: string;
@@ -41,12 +42,12 @@ export function CopyButton({ value, label = 'Copy', className = '' }: CopyButton
     >
       {copied ? (
         <>
-          <Check className="w-4 h-4 text-emerald-400" />
+          <FontAwesomeIcon icon={faCheck} className="w-4 h-4 text-emerald-400" />
           <span>Copied!</span>
         </>
       ) : (
         <>
-          <Copy className="w-4 h-4" />
+          <FontAwesomeIcon icon={faCopy} className="w-4 h-4" />
           <span>{label}</span>
         </>
       )}