feat: centralize default constants and refactor overlay enter handling in TUI

apps/interfaces/tui/src/turn.rs

@@ -130,3 +130,28 @@ pub fn spawn_agent_turn(state: &mut AppStateRest, text: String) {
         let _ = turn_service.run_turn(params).await;
     });
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_spawn_agent_turn_with_tokio_runtime() {
+        let rt = tokio::runtime::Runtime::new().unwrap();
+        let _guard = rt.enter();
+
+        let temp_dir = std::env::temp_dir().join(format!("zesdex_test_{}", uuid::Uuid::new_v4()));
+        let session_dir = temp_dir.join("session");
+        let memory_dir = temp_dir.join("memory");
+        std::fs::create_dir_all(&session_dir).unwrap();
+        std::fs::create_dir_all(&memory_dir).unwrap();
+
+        let workspace_roots = vec![temp_dir.clone()];
+        let mut state = AppStateRest::new(workspace_roots, &session_dir, memory_dir);
+
+        spawn_agent_turn(&mut state, "hello".to_string());
+        assert!(state.turn_in_flight());
+
+        let _ = std::fs::remove_dir_all(&temp_dir);
+    }
+}