feat(movement): multi-enemy awareness — phantom meteor + minimum risk track all enemies

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

common_libs/gun_harness/gun_interface.nim

@@ -7,9 +7,14 @@ import std/math
 const BotRadius* = 18.0  ## hit detection radius in px
 
 type
+  EnemyInfo* = object
+    id*:                      int
+    x*, y*:                   float
+    heading*, speed*, energy*: float
+
   WorldState* = object
     ## All raw data given to every gun every tick.
-    # Enemy
+    # Enemy (current TARGET)
     enemyX*, enemyY*:         float
     enemySpeed*, enemyHeading*: float
     # Self
@@ -22,6 +27,8 @@ type
     arenaWidth*, arenaHeight*: float
     # Meta
     tick*:                    int
+    # All alive enemies (for movement modules)
+    enemies*:                 seq[EnemyInfo]
 
   GunPrediction* = object
     ## Absolute (x, y) where the gun predicts the enemy will be.