feat(30-03): replace OnboardingWizard with catalog-driven OnboardingFlow

Swap old 4-step modal wizard with new full-screen, hobby-personalized
onboarding experience. Delete OnboardingWizard.tsx.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/client/routes/__root.tsx

@@ -18,7 +18,7 @@ import { CatalogSearchOverlay } from "../components/CatalogSearchOverlay";
 import { ConfirmDialog } from "../components/ConfirmDialog";
 import { ExternalLinkDialog } from "../components/ExternalLinkDialog";
 import { FabMenu } from "../components/FabMenu";
-import { OnboardingWizard } from "../components/OnboardingWizard";
+import { OnboardingFlow } from "../components/onboarding/OnboardingFlow";
 import { TopNav } from "../components/TopNav";
 import { useAuth } from "../hooks/useAuth";
 import { useDeleteCandidate } from "../hooks/useCandidates";
@@ -188,9 +188,9 @@ function RootLayout() {
 			{/* Auth Prompt Modal */}
 			<AuthPromptModal />
 
-			{/* Onboarding Wizard */}
+			{/* Onboarding Flow */}
 			{showWizard && (
-				<OnboardingWizard onComplete={() => setWizardDismissed(true)} />
+				<OnboardingFlow onComplete={() => setWizardDismissed(true)} />
 			)}
 		</div>
 	);