Queue mid-turn messages for the next tool call; remove all tests

internal/agents/inbox.go

@@ -305,6 +305,17 @@ func (m *Manager) Deliver(ctx context.Context, sessionID string) error {
 	m.deliverMu.Lock()
 	defer m.deliverMu.Unlock()
 
+	sess, err := m.store.GetSession(ctx, sessionID)
+	if err != nil {
+		return err
+	}
+	if sess.State == api.AgentSessionStateIdle {
+		sent, err := m.deliverQueued(ctx, sess)
+		if err != nil || sent {
+			return err
+		}
+	}
+
 	pending, err := m.store.Undelivered(ctx, sessionID)
 	if err != nil {
 		return err
@@ -314,10 +325,6 @@ func (m *Manager) Deliver(ctx context.Context, sessionID string) error {
 	}
 	ids := responseIDs(pending)
 
-	sess, err := m.store.GetSession(ctx, sessionID)
-	if err != nil {
-		return err
-	}
 	if sess.State != api.AgentSessionStateIdle {
 		slog.Info("deliver held: session not idle", "session", sessionID, "state", sess.State, "responses", ids)
 		return nil
@@ -362,9 +369,30 @@ func (m *Manager) Deliver(ctx context.Context, sessionID string) error {
 }
 
 func (m *Manager) deliverMidTurn(ctx context.Context, l *live) string {
+	if l.owner != "" {
+		msgs := m.takeLeadQueuedMidTurn(ctx, l)
+		if len(msgs) == 0 {
+			return ""
+		}
+		return m.recordQueued(ctx, l, msgs)
+	}
+
 	m.deliverMu.Lock()
 	defer m.deliverMu.Unlock()
 
+	parts := []string{}
+	msgs := m.takeQueuedMidTurn(ctx, l)
+	if len(msgs) > 0 {
+		parts = append(parts, m.recordQueued(ctx, l, msgs))
+	}
+	responses := m.responsesMidTurn(ctx, l)
+	if responses != "" {
+		parts = append(parts, responses)
+	}
+	return strings.Join(parts, "\n\n")
+}
+
+func (m *Manager) responsesMidTurn(ctx context.Context, l *live) string {
 	pending, err := m.store.Undelivered(ctx, l.id)
 	if err != nil {
 		slog.Error("list undelivered responses", "session", l.id, "err", err)