Unsubscribed contacts still show "Sending in 1 hour" — should display "Sending cancelled"

When a contact is unsubscribed from a campaign, the scheduled-send label ("Sending in 1 hour") remains visible. This creates confusion: the contact is clearly marked as Unsubscribed, yet the UI still suggests a message is queued.

Where it appears:

1. Contact activity timeline (recent activity popup)

   

2. Per-contact row in the campaign sending list

   

Mockup idea :