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9e6d280826
Add device-level input-region APIs for reading, validating, and atomically persisting absolute mouse calibration settings, including automatic, manual, and disabled modes. Introduce a shared screen viewport that keeps the rendered media geometry and configured input region aligned across MJPEG, direct H.264, and WebRTC streams. Add automatic black-border detection and a manual selection overlay with dragging, resizing, magnified preview, keyboard locking, and cancellation support. Provide original-resolution presets so manual calibration can be recalculated for common aspect ratios, expose the controls from the desktop mouse menu, close menus before entering selection mode, and preserve active file transfers when the download menu closes. Add localized control-region labels and messages for all supported locales, and update direct-frame rendering so media dimensions are reported after the canvas has been drawn.