Refactor death pulse effect to BaseEnemy with per-enemy color customization

js/entities/enemies/ChaseEnemy.js

@@ -1,7 +1,5 @@
 import { BaseEnemy } from './BaseEnemy.js';
 
-const GRID = 80;
-
 export class ChaseEnemy extends BaseEnemy {
   constructor(scene, x, y, player) {
     super(scene, x, y, player, {
@@ -12,6 +10,7 @@ export class ChaseEnemy extends BaseEnemy {
       xp: 15,
       contactDamage: 12,
     });
+    this._deathPulseColor = 0x00ff44;
   }
 
   update(delta) {
@@ -24,43 +23,7 @@ export class ChaseEnemy extends BaseEnemy {
   }
 
   _die() {
-    this._gridDeathPulse(this.x, this.y);
+    this._gridDeathPulse();
     super._die();
   }
-
-  _gridDeathPulse(px, py) {
-    const scene = this.scene;
-    const W = scene.scale.width;
-    const H = scene.scale.height;
-    const col = Math.floor(px / GRID);
-    const row = Math.floor(py / GRID);
-
-    const makeTile = (c, r, alpha) => {
-      if (c < 0 || r < 0 || c * GRID >= W || r * GRID >= H) return null;
-      return scene.add.rectangle(
-        c * GRID + GRID / 2,
-        r * GRID + GRID / 2,
-        GRID, GRID, 0x00ff44, alpha,
-      ).setDepth(2);
-    };
-
-    const center = makeTile(col, row, 0.55);
-
-    // Pre-create adjacent tiles but hide them until ADJ_MS elapses
-    const adjacents = [];
-    [[-1, 0], [1, 0], [0, -1], [0, 1]].forEach(([dc, dr]) => {
-      const t = makeTile(col + dc, row + dr, 0.38);
-      if (t) { t.setVisible(false); adjacents.push(t); }
-    });
-
-    scene._pulseEffects.push({
-      center,
-      adjacents,
-      elapsed:    0,
-      adjSpawned: false,
-      ADJ_MS:  80,
-      FADE_MS: 120,
-      END_MS:  400,
-    });
-  }
 }

js/entities/enemies/ShooterEnemy.js

@@ -18,6 +18,12 @@ export class ShooterEnemy extends BaseEnemy {
     });
     this._shootTimer = SHOOT_INTERVAL * Math.random(); // stagger first shot
     this.projectiles = scene.add.group();
+    this._deathPulseColor = 0x9900ff;
+  }
+
+  _die() {
+    this._gridDeathPulse();
+    super._die();
   }
 
   update(delta) {

js/entities/enemies/SprayerEnemy.js

@@ -19,6 +19,12 @@ export class SprayerEnemy extends BaseEnemy {
     });
     this._shootTimer = SHOOT_INTERVAL * Math.random();
     this.projectiles = scene.add.group();
+    this._deathPulseColor = 0x00ffcc;
+  }
+
+  _die() {
+    this._gridDeathPulse();
+    super._die();
   }
 
   update(delta) {

js/entities/enemies/SwarmerEnemy.js

@@ -13,6 +13,12 @@ export class SwarmerEnemy extends BaseEnemy {
     // Slight random offset so swarms don't stack perfectly
     this._offsetAngle = Math.random() * Math.PI * 2;
     this._wobble = Math.random() * 0.5;
+    this._deathPulseColor = 0xff2222;
+  }
+
+  _die() {
+    this._gridDeathPulse();
+    super._die();
   }
 
   update(delta) {