## Stack Context
This is the Nova UI half of Slack account linking. The paired API and database work is [mono#2650](https://github.com/supermemoryai/mono/pull/2650).
## What?
- Preview the Slack and signed-in Supermemory identities before linking.
- Block accounts that are not already organization members.
- Require explicit confirmation when replacing an existing mapping.
- Handle account switching and invalid, expired, used, success, and retry states.
## Why?
Users whose Slack and Supermemory emails differ need a clear, secure way to confirm their identity. The page makes the identities and organization membership requirement explicit before creating or replacing a stable mapping.
