feat: topbar de navegação como experimento de UI (v1.7.0)

- Substitui header fixo por topbar com backdrop blur e navegação agrupada em 5 seções
- Adiciona FerramentasDropdown consolidando calculadora e modo privacidade
- NotificationBell expandida com orçamentos e pré-lançamentos
- Remove logout-button, header-dashboard e privacy-mode-toggle como componentes separados
- Logo refatorado com variante compact; topbar com links em lowercase
- Adiciona dependência radix-ui ^1.4.3
- Atualiza CHANGELOG para v1.7.0

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

components/topbar/ferramentas-dropdown.tsx

@@ -0,0 +1,105 @@
+"use client";
+
+import { RiCalculatorLine, RiEyeLine, RiEyeOffLine } from "@remixicon/react";
+import { useState } from "react";
+import { CalculatorDialogContent } from "@/components/calculadora/calculator-dialog";
+import { usePrivacyMode } from "@/components/privacy-provider";
+import { Badge } from "@/components/ui/badge";
+import { Dialog, DialogTrigger } from "@/components/ui/dialog";
+import { cn } from "@/lib/utils/ui";
+
+const itemClass =
+	"flex w-full items-center gap-2.5 rounded-sm px-2 py-2 text-sm text-foreground hover:bg-accent transition-colors cursor-pointer";
+
+export function FerramentasDropdownContent() {
+	const { privacyMode, toggle } = usePrivacyMode();
+	const [calcOpen, setCalcOpen] = useState(false);
+
+	return (
+		<Dialog open={calcOpen} onOpenChange={setCalcOpen}>
+			<ul className="grid w-52 gap-0.5 p-2">
+				<li>
+					<DialogTrigger asChild>
+						<button type="button" className={cn(itemClass)}>
+							<span className="text-muted-foreground shrink-0">
+								<RiCalculatorLine className="size-4" />
+							</span>
+							<span className="flex-1 text-left">calculadora</span>
+						</button>
+					</DialogTrigger>
+				</li>
+				<li>
+					<button type="button" onClick={toggle} className={cn(itemClass)}>
+						<span className="text-muted-foreground shrink-0">
+							{privacyMode ? (
+								<RiEyeOffLine className="size-4" />
+							) : (
+								<RiEyeLine className="size-4" />
+							)}
+						</span>
+						<span className="flex-1 text-left">privacidade</span>
+						{privacyMode && (
+							<Badge
+								variant="secondary"
+								className="text-[10px] px-1.5 py-0 h-4"
+							>
+								Ativo
+							</Badge>
+						)}
+					</button>
+				</li>
+			</ul>
+			<CalculatorDialogContent open={calcOpen} />
+		</Dialog>
+	);
+}
+
+type MobileFerramentasItemsProps = {
+	onClose: () => void;
+};
+
+export function MobileFerramentasItems({
+	onClose,
+}: MobileFerramentasItemsProps) {
+	const { privacyMode, toggle } = usePrivacyMode();
+	const [calcOpen, setCalcOpen] = useState(false);
+
+	return (
+		<Dialog open={calcOpen} onOpenChange={setCalcOpen}>
+			<DialogTrigger asChild>
+				<button
+					type="button"
+					className="flex w-full items-center gap-3 rounded-md px-3 py-2 text-sm transition-colors text-muted-foreground hover:text-foreground hover:bg-accent"
+				>
+					<span className="text-muted-foreground shrink-0">
+						<RiCalculatorLine className="size-4" />
+					</span>
+					<span className="flex-1 text-left">calculadora</span>
+				</button>
+			</DialogTrigger>
+			<button
+				type="button"
+				onClick={() => {
+					toggle();
+					onClose();
+				}}
+				className="flex w-full items-center gap-3 rounded-md px-3 py-2 text-sm transition-colors text-muted-foreground hover:text-foreground hover:bg-accent"
+			>
+				<span className="text-muted-foreground shrink-0">
+					{privacyMode ? (
+						<RiEyeOffLine className="size-4" />
+					) : (
+						<RiEyeLine className="size-4" />
+					)}
+				</span>
+				<span className="flex-1 text-left">privacidade</span>
+				{privacyMode && (
+					<Badge variant="secondary" className="text-[10px] px-1.5 py-0 h-4">
+						Ativo
+					</Badge>
+				)}
+			</button>
+			<CalculatorDialogContent open={calcOpen} />
+		</Dialog>
+	);
+}