fix: replace various anchor tags with buttons to prevent text selection on repeated clicks

client/src/components/Nav/Logout.jsx

@@ -11,13 +11,13 @@ export default function Logout() {
   };
 
   return (
-    <a
+    <button
       className="flex cursor-pointer items-center gap-3 rounded-md py-3 px-3 text-sm text-white transition-colors duration-200 hover:bg-gray-500/10"
       onClick={clickHandler}
     >
       <LogOutIcon />
       {user?.display || user?.username || 'USER'}
       <small>Log out</small>
-    </a>
+    </button>
   );
 }