Spawn Balance and Various Fixes — Alien Grounds Steam update #89737

• Changed Health Packs and Rifle Ammo spawning to a weighted system - smarter, more consistent drops based on player status• Reduced Rifle Ammo box size for better visual clarity• Reduced Rifle Ammo box ammo quantity for smoother gameplay• Added Freeze Gun “no ammo” sound and HUD indication• Fixed: Craft flyovers before mission start• Improved: Sprint toggle message shortened and more readable• Fixed: Headshot counter not updating correctly• Fixed: Enemies killed by enemy fireballs could cause total enemies on map to exceed the limit• Fixed: Ammo message could wipe the crosshair