Revert "Replace PNG icons with Habbo-style SVG pixel art icons across index, nav, and mobile nav"

This reverts commit ac16df98c3.

src/components/nav-dropdown.tsx

@@ -1,12 +1,13 @@
 "use client";
 
 import { AnimatePresence, motion } from "framer-motion";
+import Image from "next/image";
 import { type ReactNode, useEffect, useRef, useState } from "react";
 import { dropdownVariants } from "@/lib/motion";
 
 interface NavDropdownProps {
 	label: string;
-	icon?: ReactNode;
+	icon?: string;
 	children: ReactNode;
 }
 
@@ -44,7 +45,14 @@ export function NavDropdown({ label, icon, children }: NavDropdownProps) {
 				aria-expanded={open}
 			>
 				{icon ? (
-					<span className="mr-1.5 flex items-center">{icon}</span>
+					<Image
+						src={icon}
+						alt=""
+						width={20}
+						height={20}
+						className="mr-1.5"
+						unoptimized
+					/>
 				) : null}
 				{label}
 				<motion.svg