feat(onboarding): replace CreateProfile/ConnectGarmin with a single deferred-commit wizard

frontend/src/LoginGate.tsx

@@ -2,8 +2,7 @@ import { useEffect, useState } from "react";
 import { api, BASE_URL } from "./api/client";
 import "./LoginGate.css";
 import App from "./App";
-import { ConnectGarmin } from "./ConnectGarmin";
-import { CreateProfile } from "./CreateProfile";
+import { OnboardingWizard } from "./OnboardingWizard";
 import type { SessionInfo } from "./types/api";
 
 type Status = "loading" | "authenticated" | "unauthenticated";
@@ -18,10 +17,11 @@ const AUTH_ERROR_MESSAGES: Record<string, string> = {
 // this is the first fork -- "show the login screen" vs "show the app." A
 // second fork, once authenticated, is whether the session's account has a
 // provisioned profile yet (session.has_profile) -- a brand-new OIDC login
-// sees CreateProfile instead of App until it submits one. A third fork,
-// once provisioned, is whether Garmin has ever been successfully connected
-// (session.garmin_connected) -- mandatory, and re-checked on every login,
-// not just immediately after signup.
+// sees OnboardingWizard instead of App until it completes one. Nothing is
+// persisted until the wizard's Garmin-connect step actually succeeds (see
+// docs/superpowers/specs/2026-07-26-onboarding-wizard-deferred-commit-design.md),
+// so has_profile alone is always sufficient here -- there's no separate
+// "provisioned but not connected" state to gate on.
 export function LoginGate() {
   const [status, setStatus] = useState<Status>("loading");
   const [session, setSession] = useState<SessionInfo | null>(null);
@@ -55,15 +55,11 @@ export function LoginGate() {
 
   if (!session!.has_profile) {
     return (
-      <CreateProfile
+      <OnboardingWizard
         onCreated={(displayName) => setSession((s) => (s ? { ...s, has_profile: true, display_name: displayName } : s))}
       />
     );
   }
 
-  if (!session!.garmin_connected) {
-    return <ConnectGarmin onConnected={() => setSession((s) => (s ? { ...s, garmin_connected: true } : s))} />;
-  }
-
   return <App session={session!} />;
 }