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

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

common_libs/movements/minimum_risk.nim

@@ -7,9 +7,6 @@ import std/math
 import gun_harness/gun_interface
 import movement_harness/movement_interface
 
-# TODO: WorldState only carries one enemy. Extend WorldState with a seq of
-# threat positions (enemies) and update scoreCandidates to iterate all of them.
-# For now we treat the single enemy as the only threat point.
 
 const
   CandidateRadius = 150.0   # px radius for ring candidates
@@ -80,8 +77,13 @@ proc recalcTarget(m: var MinimumRiskModule, ws: WorldState) =
   let w   = ws.arenaWidth
   let h   = ws.arenaHeight
 
-  # Single threat for now; TODO: replace with ws.enemies when available
-  let threats = [vec2(ws.enemyX, ws.enemyY)]
+  # Use all alive enemies; fall back to single target when seq is empty
+  var threats: seq[Vec2]
+  if ws.enemies.len > 0:
+    for ei in ws.enemies:
+      threats.add vec2(ei.x, ei.y)
+  else:
+    threats.add vec2(ws.enemyX, ws.enemyY)
 
   # Build candidates: ring + random (deterministic via tick-seeded offsets)
   var best     = bot          # fallback: stay put