Nebula 3.0.43

Changes since nebula-v3.0.42:

• b93b6684 Prevent terminal crash after an empty Core timeout error (#938)
• b6992c2b Improve terminal chat role hierarchy and repeated prompt display (#937)
• 928727eb Use available terminal pane width for chat (#936)
• ff480db9 Improve terminal layout and animated activity feedback (#935)
• a2c0ef43 Bound harness-session naming to listed sessions (#934)
• 27a57aec Show loading feedback during terminal selections (#933)
• 47754113 Show running and idle conversations in terminal client (#932)
• 3ac3f299 Show contextual slash commands in terminal chat (#931)
• 9e7a4a7c Improve terminal chat readability and navigation (#930)