Calls tab on user and company profiles

Add a Calls tab to user and company profiles that shows their synced customer calls, with access to the call summary and transcript.

This would let support agents see recent calls held by customer success or sales and understand what was discussed, without switching tools or asking another team for context.

Only show calls selected for sync and permitted for the viewer. Keep call history available alongside the customer's conversations and feedback, rather than only exposing extracted feature requests.