Build 25981988

This update focuses on smoother card interactions, settings adjustments, and battle effects, alongside fixes to save protection, controls, and several rules descriptions.

Performance improvements
- Improved responsiveness when hovering over cards, opening enlarged card views, and moving between cards.
- Optimized card damage and effect previews to reduce delays caused by repeated calculations.
- Optimized ship wakes and shoreline processing by spreading some calculations across frames to reduce sudden workload spikes.
- Reduced memory usage and initial loading overhead for certain ability icons.
- Reduced stuttering when dragging sliders for battle effects, controller dead zones, and map movement/zoom speeds. The final values are saved when adjustments end or you leave settings.

Bug fixes
- Fixed an issue where a missing main progress file could be treated as a fresh start despite an existing backup, potentially overwriting recoverable progress.
- Fixed battery counterattacks failing to correctly apply Armor, Guard, and single-hit damage caps.
- Fixed the Space shortcut for ending a turn potentially also activating the currently focused button.
- Fixed controller confirmation potentially clearing a required selection, such as battle speed, when confirming an already selected option.
- Fixed custom keybindings potentially conflicting or triggering the wrong action on some non-QWERTY keyboard layouts.

Text corrections
- Updated the difficulty 4 support-source legend in all four languages to clarify that support applies only to national final battles. This is a text correction, with no change to the support mechanic.
- Standardized the Japanese term for Guard in the British final battle and canal fortress descriptions.