hive-agent: surface an interrupted-turn banner in the wake prompt after /cancel

hive-agent/src/web_ui/actions.rs

@@ -54,7 +54,17 @@ pub(super) async fn post_send(
 pub(super) async fn post_cancel_turn(State(state): State<AppState>) -> Response {
     let out = super::sigint_claude().await;
     let note = match out {
-        Ok(o) if o.status.success() => "operator: /cancel — sent SIGINT to claude".to_owned(),
+        Ok(o) if o.status.success() => {
+            // A process actually got signalled — the *next* turn's wake
+            // prompt should tell the agent it was cut off mid-work. Only
+            // set on an actual signal: a `pkill` exit 1 ("no process to
+            // interrupt") means /cancel raced an already-finished turn, so
+            // there's nothing to flag as interrupted.
+            state
+                .interrupted
+                .store(true, std::sync::atomic::Ordering::Relaxed);
+            "operator: /cancel — sent SIGINT to claude".to_owned()
+        }
         Ok(o) if o.status.code() == Some(1) => {
             "operator: /cancel — no claude process to interrupt".to_owned()
         }