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

internal/store/store.go

@@ -305,6 +305,16 @@ CREATE TABLE reviews (
 	UNIQUE (task_id, snapshot_n)
 );
 CREATE UNIQUE INDEX reviews_session ON reviews(agent_session_id);
+`}, {"add-task-inputs", `
+CREATE TABLE task_inputs (
+	id INTEGER PRIMARY KEY AUTOINCREMENT,
+	task_id TEXT NOT NULL REFERENCES tasks(id),
+	actor TEXT NOT NULL,
+	text TEXT NOT NULL,
+	images TEXT NOT NULL DEFAULT '[]',
+	created_at TEXT NOT NULL
+);
+CREATE INDEX task_inputs_task ON task_inputs(task_id, id);
 `}}
 
 const (
@@ -783,6 +793,10 @@ func (s *Store) closeTask(ctx context.Context, id string, status api.TaskStatus,
 		if err != nil {
 			return err
 		}
+		_, err = tx.ExecContext(ctx, `DELETE FROM task_inputs WHERE task_id = ?`, id)
+		if err != nil {
+			return err
+		}
 		return dismissTaskInbox(ctx, tx, emit, id, actor)
 	})
 	if err != nil {