feat: make interrupt state not final for multi-agents (#13850)

Make `interrupted` an agent state and make it not final. As a result, a
`wait` won't return on an interrupted agent and no notification will be
send to the parent agent.

The rationals are:
* If a user interrupt a sub-agent for any reason, you don't want the
parent agent to instantaneously ask the sub-agent to restart
* If a parent agent interrupt a sub-agent, no need to add a noisy
notification in the parent agen

codex-rs/core/src/agent/control_tests.rs

@@ -207,7 +207,7 @@ async fn on_event_updates_status_from_turn_aborted() {
         reason: TurnAbortReason::Interrupted,
     }));
 
-    let expected = AgentStatus::Errored("Interrupted".to_string());
+    let expected = AgentStatus::Interrupted;
     assert_eq!(status, Some(expected));
 }
 

codex-rs/core/src/agent/status.rs

@@ -7,7 +7,12 @@ pub(crate) fn agent_status_from_event(msg: &EventMsg) -> Option<AgentStatus> {
     match msg {
         EventMsg::TurnStarted(_) => Some(AgentStatus::Running),
         EventMsg::TurnComplete(ev) => Some(AgentStatus::Completed(ev.last_agent_message.clone())),
-        EventMsg::TurnAborted(ev) => Some(AgentStatus::Errored(format!("{:?}", ev.reason))),
+        EventMsg::TurnAborted(ev) => match ev.reason {
+            codex_protocol::protocol::TurnAbortReason::Interrupted => {
+                Some(AgentStatus::Interrupted)
+            }
+            _ => Some(AgentStatus::Errored(format!("{:?}", ev.reason))),
+        },
         EventMsg::Error(ev) => Some(AgentStatus::Errored(ev.message.clone())),
         EventMsg::ShutdownComplete => Some(AgentStatus::Shutdown),
         _ => None,
@@ -15,5 +20,8 @@ pub(crate) fn agent_status_from_event(msg: &EventMsg) -> Option<AgentStatus> {
 }
 
 pub(crate) fn is_final(status: &AgentStatus) -> bool {
-    !matches!(status, AgentStatus::PendingInit | AgentStatus::Running)
+    !matches!(
+        status,
+        AgentStatus::PendingInit | AgentStatus::Running | AgentStatus::Interrupted
+    )
 }