修改：会话消息独立线程池；线程池参数统一设置

liusuyi

2024-08-01 60211f59d2c85053533ed151adb2bdc5348dd342

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export var REDRAW_BIT = 1;
export var STYLE_CHANGED_BIT = 2;
export var SHAPE_CHANGED_BIT = 4;