Fixed several bugs including the "invisible zombie" issue.

● Fixed the invisible zombie bug occurring in snowy areas.

● Zombies can no longer push player characters sideways.

● Wooden storage box capacity increased by 5.

● When placing a workbench aimed at the ground, its transparent preview will now always face the player.

● Fixed a bug where the character would occasionally jump in the opposite direction when on a vehicle.

● Fixed a bug where getting out of the driver's seat would teleport the player to the wrong location.

● Pedal generator power generation efficiency increased by 100%.

● Armor durability loss from zombie attacks is no longer a fixed 10 points, but now equals the actual damage dealt by the zombie.