fix: 禁止预览命令触发自动快速存档

[A-kirami]

变更说明

修复编辑器预览命令触发 stage commit 时，会意外触发自动快速存档的问题。

本次改动将 notifyReact 和 autoFastSave 拆成两个独立的 commit 副作用：
普通游戏流程默认继续自动快速存档，编辑器预览流程显式传入 { autoFastSave: false }。

主要改动

• 为 StageStateManager.commit() 增加 autoFastSave 选项。
• 将自动快速存档触发条件从 notifyReact 改为 autoFastSave。
• 预览同步命令统一关闭自动快速存档。
• 将 commitOptions 沿以下链路传递：
  • nextSentence -> forward -> scriptExecutor -> runScript
  • perform 启动、自然结束、-continue 自动推进
  • changeScene / callScene / restoreScene 的异步续接
  • choose 和 getUserInput 的用户回调

[gemini-code-assist]

Code Review

This pull request decouples the automatic fast-saving of the game from the React notification mechanism by introducing a new autoFastSave option to IStageCommitOptions. This option is propagated throughout the codebase, including the performance controller, script execution paths, and scene transition functions, and is explicitly disabled during preview and debug syncs. The feedback highlights a potential regression in stageStateManager.ts where silent commits (with notifyReact: false) might now unexpectedly trigger auto-saving because autoFastSave defaults to true. A code suggestion is provided to default autoFastSave to options.notifyReact to preserve backward compatibility.

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