test(tui): cover steer prompt restore state

crates/tui/src/tui/app.rs

@@ -3736,14 +3736,13 @@ impl App {
         }
         let Some(prompt) = self
             .last_submitted_prompt
-            .as_ref()
+            .as_deref()
             .filter(|prompt| !prompt.is_empty())
-            .cloned()
         else {
             return false;
         };
 
-        self.input = prompt;
+        self.input = prompt.to_string();
         self.cursor_position = char_count(&self.input);
         self.history_index = None;
         self.history_navigation_draft = None;

crates/tui/src/tui/ui/tests.rs

@@ -3044,6 +3044,29 @@ async fn dispatch_user_message_records_prompt_for_cancel_restore() {
     }
 }
 
+#[tokio::test]
+async fn steer_user_message_records_prompt_for_cancel_restore() {
+    let mut app = create_test_app();
+    let mut engine = crate::core::engine::mock_engine_handle();
+    let queued = crate::tui::app::QueuedMessage::new(
+        "adjust the active turn\nthen continue".to_string(),
+        None,
+    );
+
+    steer_user_message(&mut app, &engine.handle, queued)
+        .await
+        .expect("steer user message");
+
+    assert_eq!(
+        app.last_submitted_prompt.as_deref(),
+        Some("adjust the active turn\nthen continue")
+    );
+    assert_eq!(
+        engine.rx_steer.recv().await.as_deref(),
+        Some("adjust the active turn\nthen continue")
+    );
+}
+
 #[tokio::test]
 async fn numeric_plan_choice_still_queues_follow_up_when_busy() {
     let mut app = create_test_app();