chore: add project files and setup gitignore

reserva-mesa-dashboard/components/dashboard/Header.tsx

@@ -0,0 +1,26 @@
+"use client";
+
+import { UserNav } from "./UserNav";
+import { usePathname } from "next/navigation";
+
+const pageTitles: Record<string, string> = {
+  "/": "Dashboard",
+  "/reservas": "Reservas",
+  "/lista-espera": "Lista de Espera",
+  "/mesas": "Mesas",
+  "/equipa": "Equipa",
+  "/historico": "Histórico",
+  "/configuracoes": "Configurações",
+};
+
+export function Header() {
+  const pathname = usePathname();
+  const title = pageTitles[pathname] || "Dashboard";
+
+  return (
+    <header className="hidden md:flex h-20 items-center justify-between px-8 border-b border-border bg-card/50 backdrop-blur-sm sticky top-0 z-30">
+      <h2 className="text-xl font-display font-bold text-foreground">{title}</h2>
+      <UserNav />
+    </header>
+  );
+}