feat(agents,backends,conversations,frontends,ui): progress thinking is told apart by its agent, raycast reasoning stays collapsed, read_conversation keeps progress

src/beaver_gateway/frontends/turn_record.py

@@ -46,6 +46,7 @@ class TurnRecord:
     agent_name: str
     input_messages: list[MessageParam]
     output_message: Message
+    thinking_is_progress: bool
     system: str | None = None
     source: str = "anthropic"