[Visual] No encounter visual differentiation

[niyazmft]

Issue Reference

Audit ID: S-15
Source: level_design_audit.md §L-15

Description

All enemies of the same type look identical. A heavy_patrol with a tank and two grunts looks like 'three enemies' — the player can't tell it's a specialized group. Group leaders have no visual distinction.

Affected Files

Enemy .tscn files, sprite assets

Acceptance Criteria

• Acceptance criteria:
  • Tank has a shield icon or visual indicator
  • Mage has a glow or staff visual
  • OR: group leader has a subtle outline or marker