refactor: substituir topbar por navbar componentizada

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

components/navbar/nav-link.tsx

@@ -0,0 +1,30 @@
+"use client";
+
+import Link from "next/link";
+import { useSearchParams } from "next/navigation";
+import { useMemo } from "react";
+
+const PERIOD_PARAM = "periodo";
+
+type NavLinkProps = Omit<React.ComponentProps<typeof Link>, "href"> & {
+	href: string;
+	preservePeriod?: boolean;
+};
+
+export function NavLink({
+	href,
+	preservePeriod = false,
+	...props
+}: NavLinkProps) {
+	const searchParams = useSearchParams();
+
+	const resolvedHref = useMemo(() => {
+		if (!preservePeriod) return href;
+		const periodo = searchParams.get(PERIOD_PARAM);
+		if (!periodo) return href;
+		const separator = href.includes("?") ? "&" : "?";
+		return `${href}${separator}${PERIOD_PARAM}=${encodeURIComponent(periodo)}`;
+	}, [href, preservePeriod, searchParams]);
+
+	return <Link href={resolvedHref} {...props} />;
+}