Panels Not Screens

Added

• Shared panel focus and render ordering across different mods, even when each mod owns a separate PanelManager.
• Panel.bringToFront() for interactions managed outside the library's normal input methods.
• PanelManager routing for key presses, key releases, and typed characters.
• Automated coverage for click, scroll, keyboard, and cross-manager stacking behavior.

Changed

• The most recently interacted-with panel now renders above older panels instead of remaining in a fixed mod or registration order.
• Handled mouse releases, scrolling, keyboard events, and typed characters now also update panel focus.
• Panel render layers reserve enough depth for item icons, decorations, and tooltips so content from an older panel does not bleed through the focused panel.

Fixed

• Fixed panels from one mod always appearing beneath panels from another mod after being clicked.