index: Redirect to current step.

start: Show onboarding start choice (demo vs real setup).

startStandard: Start standard onboarding flow.

startPreview: Start preview mode with demo data.

disablePreview: Disable preview mode and remove demo data.

showStep: Show a specific step.

submitStep1: Step 1: Algemeen - Organization name, calendar display, notifications.

submitStep2: Submit Step 2: Verlofsoorten.

submitStep3: Submit Step 3: Verlof Opbouw.

submitStep4: Submit Step 4: Carryover.

submitStep5: Submit Step 5: Aanvraagregels.

submitStep6: Submit Step 6: Saldo Beleid.

submitStep7: Submit Step 7: Ziekte.

submitStep8: Submit Step 8: Jouw Profiel.

submitStep9: Submit Step 9: Test Data.

submitLegacySettings: Legacy handler: Submit all settings at once (for backwards compatibility with tests).

complete: Complete onboarding.