20250919 Game Update

Optimization and Fixes

• Added selection mechanism for base vehicles.
• Optimized special effects shadows in the farm tutorial level.
• Fixed the bug where the guide line disappears.
• Fixed the bug where two base vehicles appear in the farm tutorial level.
• Fixed the bug where flamethrower soldiers' attacks are restricted while standing on scaffolding.
• Fixed the abnormal bug that occurs when pulling walls consecutively.
• Optimized map design.
• Fixed the bug where tasks were not displaying correctly.
• Optimized description text for some buildings.
• Fixed the bug where motorcycles couldn't attack in certain situations.
• Adjusted the sound volume for some units.