[2.0.9] Defense Mode Rework, Visual Fixes & Stability Improvements

This update reworks the Defense game mode, improves aircraft AI, introduces a new main menu notification system, and includes several visual, audio, and stability fixes.

Defense Mode

• Reworked the overall behavior and balance of Defense mode.
• Captured objectives now have a greater impact on ticket drain speed.
• Defender tickets now scale more appropriately with unit count.
• Ticket gains between phases now adjust slightly based on the remaining tickets, providing better automatic balance.
• Attackers will move between objectives more frequently instead of remaining on already captured positions.

Vehicles and Aircraft

• Fixed several texture issues on the Marder II and Panzer II.
• Fixed the Hetzer tracks missing their destroyed-state effect.
• Fixed an issue that could cause aircraft machine-gun sounds to continue playing indefinitely.
• Fixed aircraft machine-gun sounds becoming distorted or overlapping when firing all guns simultaneously.
• Added minor general improvements to aircraft AI.

Visuals and Interface

• Added a new main menu notification interface for beta information, error messages, and other notices.
• Fixed several LODs not receiving shadows, particularly in the Shanghai DLC.
• Fixed the sunray effect not working on Linux and improved the effect in general.
• Fixed 3D markers appearing to bounce when the camera moved quickly.
• Fixed tree branches flickering on macOS.

Additional Changes

• Various squad adjustments and mission fixes.
• Various localization fixes.
• Minor stability improvements.