Fix window content layout and restore behavior from system tray

[Gabriel Dufresne (GabrielDuf)]

This pull request makes targeted improvements to how the application window behaves on Windows, especially regarding maximizing and restoring from the system tray. The changes ensure the window is correctly sized and positioned when maximized and that restoring from the tray maintains the expected window state.

Window Management Improvements:

• When the window is maximized, the client area now matches the monitor's work area exactly, preventing UI elements from being clipped or positioned offscreen. This replaces the previous logic that applied a phantom frame inset.
• When restoring the window from the system tray, the code now checks if the window was maximized before being hidden and reapplies the maximized state if needed. This ensures consistent behavior, especially when the maximize state wasn't tracked by the UI framework.

[Copilot]

Pull request overview

Improves Windows window sizing and tray restoration behavior.

Changes:

• Aligns maximized client bounds with the monitor work area.
• Restores maximized state after reopening from the system tray.

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