引入游玩回合与开场收口，抽出可替换 agent 司机并支持运行中止；完善预设洞位、世界书拼装与试跑，并打磨会话运行时与 Web 交互。

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/play-turn.test.ts

@@ -0,0 +1,28 @@
+import { describe, expect, it } from "vitest";
+import {
+  SLOT_PLAY_LAYER_ACTIVE,
+  SLOT_PLAY_TURN_QUEUE,
+  isPlayLayerActive,
+  readPlayTurnQueue,
+  withPlayTurnQueue,
+} from "../src/skills/play-turn.js";
+
+describe("play-turn slots", () => {
+  it("reads a trimmed queue and ignores junk", () => {
+    expect(readPlayTurnQueue(undefined)).toEqual([]);
+    expect(
+      readPlayTurnQueue({ [SLOT_PLAY_TURN_QUEUE]: [" auditor ", "", 3, "gm"] }),
+    ).toEqual(["auditor", "gm"]);
+  });
+
+  it("writes queue or clears when empty", () => {
+    const withIds = withPlayTurnQueue({ a: 1 }, ["gm", "narrator"]);
+    expect(withIds[SLOT_PLAY_TURN_QUEUE]).toEqual(["gm", "narrator"]);
+    expect(withPlayTurnQueue(withIds, []).playTurnQueue).toBeUndefined();
+  });
+
+  it("detects play layer flag", () => {
+    expect(isPlayLayerActive(undefined)).toBe(false);
+    expect(isPlayLayerActive({ [SLOT_PLAY_LAYER_ACTIVE]: true })).toBe(true);
+  });
+});