refactor(core): move app para src e padroniza estrutura

src/shared/components/month-picker/nav-button.tsx

@@ -0,0 +1,30 @@
+"use client";
+
+import { RiArrowLeftSLine, RiArrowRightSLine } from "@remixicon/react";
+
+interface NavigationButtonProps {
+	direction: "left" | "right";
+	disabled?: boolean;
+	onClick: () => void;
+}
+
+export default function NavigationButton({
+	direction,
+	disabled,
+	onClick,
+}: NavigationButtonProps) {
+	const Icon = direction === "left" ? RiArrowLeftSLine : RiArrowRightSLine;
+
+	return (
+		<button
+			onClick={onClick}
+			className="text-card-foreground transition-all duration-200 cursor-pointer rounded-lg p-1 hover:bg-card-foreground/10 focus:outline-hidden focus:ring-2 focus:ring-card-foreground/30 disabled:cursor-not-allowed disabled:opacity-40 disabled:hover:bg-transparent"
+			disabled={disabled}
+			aria-label={`Navegar para o mês ${
+				direction === "left" ? "anterior" : "seguinte"
+			}`}
+		>
+			<Icon className="text-primary" size={18} />
+		</button>
+	);
+}