fix: language switcher always includes locale prefix in path

src/components/layout/Header.tsx

@@ -51,7 +51,7 @@ export default function Header({ locale = "sr" }: HeaderProps) {
     }
     document.cookie = `NEXT_LOCALE=${newLocale}; path=/; max-age=31536000`;
     const pathWithoutLocale = pathname.replace(/^\/(sr|en|de|fr)/, "") || "/";
-    const newPath = newLocale === "sr" ? pathWithoutLocale : `/${newLocale}${pathWithoutLocale}`;
+    const newPath = `/${newLocale}${pathWithoutLocale}`;
     router.push(newPath);
     setLangDropdownOpen(false);
   };