Funnel stages and lists

1. Every contact has a stage: cold → subscriber → lead → customer → regular.
2. Change it manually on the contact card, automatically after a campaign, or from your systems via POST /api/hooks/stage.
3. Lists belong to contacts only. Manage them with the gear next to “Lists” in the sidebar or “+ New list”; Contacts, Campaigns and Inbox can be filtered by list.
4. Tags are free-form labels — click a tag to filter contacts by it.