Add Away mode and an agent fork tool

internal/agents/inbox.go

@@ -146,6 +146,22 @@ func (m *Manager) ask(ctx context.Context, l *live, raw json.RawMessage) (string
 	l.asked = true
 	m.mu.Unlock()
 
+	task, err := m.store.GetTask(ctx, l.taskID)
+	if err != nil {
+		return "", err
+	}
+	creator, err := m.store.GetUser(ctx, task.CreatedBy)
+	if err != nil {
+		return "", err
+	}
+	if creator.Away {
+		err = m.answerAway(ctx, creator.Login, id)
+		if err == nil {
+			return fmt.Sprintf("Question %s filed, but %s is away, so byre answered it for them at once; the answer reaches you next.", id, creator.Login), nil
+		}
+		slog.Error("answer question while away", "item", id, "user", creator.Login, "err", err)
+	}
+
 	return fmt.Sprintf("Question filed in the human's inbox. question_id: %s. End your turn now. The answer will arrive as your next message. "+
 		"If the human answers it some other way, such as in a chat message, withdraw it with cancel_question and question_id %q.", id, id), nil
 }