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fd3ac9c95e
Refactor Dialog and MessageBox sizing logic to use the greater of percentage-based minimums or required subview size, ensuring dialogs are never too small for their content. Lower default minimum sizes for both Dialog and MessageBox. Implement IDesignable for Dialog, providing design-time sample content and buttons. Dialog appearance now switches styles based on modal/design mode. Refactor Dialogs demo for clarity, error handling, and modern C# usage. Update View content size calculations to include all subviews (including padding) for more accurate layout. General code modernization: use C# 9/10 features, improve readability, and maintainability.