Refactor and update navigation and constants

- Refactor code for consistency in formatting and styling.
- Update `navLinks` to revise URLs and labels for improved clarity.
- Adjust button text in `DesktopNav` from "Portal" to "Kontakt".

components/Navbar/DesktopNav.tsx

@@ -60,8 +60,12 @@ const Nav = ({openNav}: Props) => {
                 <div className="hidden lg:flex items-center space-x-6 transition-all duration-300 ease-in-out">
                     {navLinks.map((link) => (
                         <Link href={link.url} key={link.id}>
-                            <p className={`nav_link ${contentSize} transition-all duration-300 ease-in-out`}
-                               style={{color: colors.primaryText}}>{link.label}</p>
+                            <p
+                                className={`nav_link ${contentSize} transition-all duration-300 ease-in-out uppercase font-semibold`}
+                                style={{color: colors.primaryText}}>
+                                {link.label}
+                            </p>
+
                         </Link>
                     ))}
                 </div>
@@ -72,7 +76,7 @@ const Nav = ({openNav}: Props) => {
                     <button
                         className={`${buttonSize} text-white font-semibold bg-blue-700 hover:bg-blue-900 transition-all duration-300 ease-in-out rounded-full`}
                     >
-                        Portal
+                        Kontakt
                     </button>
 
                     {/* Theme Toggle Button */}