feat(onboarding): add /welcome route

app/(welcome)/welcome/onboarding-client.tsx

@@ -0,0 +1,24 @@
+"use client";
+
+import { useRouter } from "next/navigation";
+import { OnboardingProvider } from "@onboardjs/react";
+import { onboardingSteps } from "@/features/onboarding/onboarding-steps";
+import { OnboardingShell } from "@/features/onboarding/onboarding-shell";
+import { markOnboardingDone } from "@/features/onboarding/onboarding-cookie";
+
+export const OnboardingClient = ({ initialStepId }: { initialStepId: string }) => {
+    const router = useRouter();
+
+    return (
+        <OnboardingProvider
+            steps={onboardingSteps}
+            initialStepId={initialStepId}
+            onFlowComplete={async () => {
+                await markOnboardingDone();
+                router.push("/dashboard/home");
+            }}
+        >
+            <OnboardingShell />
+        </OnboardingProvider>
+    );
+};

app/(welcome)/welcome/page.tsx

@@ -0,0 +1,15 @@
+import { redirect } from "next/navigation";
+import { currentUser } from "@/lib/auth/current-user";
+import { isOnboardingDone } from "@/features/onboarding/onboarding-cookie";
+import { OnboardingClient } from "./onboarding-client";
+
+export default async function WelcomePage() {
+    if (await isOnboardingDone()) {
+        redirect("/dashboard/home");
+    }
+
+    const user = await currentUser();
+    const initialStepId = user ? "org-create" : "sso-gate";
+
+    return <OnboardingClient initialStepId={initialStepId} />;
+}