- ProviderSelectionStep: three provider cards (Puter/Google/API key) with adapter badges
- Cards use border-primary bg-primary/5 when selected (matches ModeSelector pattern)
- PuterAuthButton/GoogleOAuthButton/ApiKeyEntryForm wired via callbacks
- NexusOnboardingWizard: step count 3→4, provider selection at step 3
- Parallel probe for hermes_local/claude_local/openclaw_gateway on wizard open
- Credentials stored after company creation (puterToken, googleOAuthStateId, apiKeyData)
- Skip always advances to step 4; Back from step 4 goes to step 3
