refactor(vpui): 引入 tkinter 式类层次 Misc/Wm/BaseWidget/Widget，新增容器控件 Frame

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层次：Misc(mixin：master/tk + winfo_master/toplevel + bind/unbind) ├─ Tk(Wm, Misc) └─ BaseWidget(Misc) └─ Widget(BaseWidget) ← Label/Button/Entry/Scrollbar/FBCanvas/Text/Frame 全部继承 Widget。约束按 Test/MultiInheritTest 的布局模型：父类字段展平进子类、非首基类必须无字段（故 Wm 无字段）、基类方法内不做 self.<虚拟> 自我分派（多继承非最左基类的虚表索引会整体后移）。控件 master 由 Widget* 改为 Misc*（Tk* 成为合法上转型），原先 8 处 Tk*(self.master) 裸转改为 self.tk；事件派发统一走 BaseWidget.dispatch_event（先跑 bind 回调再 handle_event）。中文。

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TermiNexus committed 2026-10-16 16:29:04 +08:00

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