Hotkeys to swap player on monitor & Last/Next player name

この issue には説明がありません。

The issue title suggests adding hotkeys to swap player views on a monitor and display player names. Start by examining the UI code for the monitor display and input handling in the C# project. Look for existing hotkey implementations and player management logic. Determine how to capture key presses and update the UI accordingly, then test the changes with the application running.

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