Optimized AI retreat behavior to improve performance in large battles
Enhanced enemy detection logic for agents with low stamina
Reduced unnecessary calculations when agents are resting
Fixed potential performance drops when many agents retreat simultaneously
Code optimizations to maintain smooth gameplay even with many active agents
No functional changes to stamina mechanics or retreat behavior - everything works the same, just faster

HOTFIX: Made the stamina bar automatically hide when stamina is full for a cleaner HUD experience.

Implemented a fully dynamic stamina bar integrated into the HUD, visually tracking the player's stamina percentage in real time.

Tactical retreat improvement:
Agents will now continue retreating if an enemy approaches too close while they are resting due to low stamina, dynamically maintaining a safe distance.

Immersion improvement:
Stamina debug messages (InformationManager) have been disabled for a cleaner and more immersive combat experience.

Fixed a crash that could occur during tournaments when agents ran out of stamina.
Improved team validation to prevent rare edge-case crashes in special mission types.
Minor internal cleanup to improve stability.

Minor changes.