After a participant is transferred, progress them to the next stage

[cjqian]

No description provided.

[vivtsai]

@cjqian I think this may already be WAI? It should progress participants to the next stage if they are currently on the transfer stage, but keep them on the same stage if they are transferred when on a non-transfer stage (e.g., in the middle of chat stage).

deliberate-lab/frontend/src/services/participant.service.ts

Line 385 in faf3e5b

// If transfer stage, progress to next stage