fix(game): 修复召唤按钮第二次失效和实习生不攻击的Bug

game/towers/InternTower.ts

@@ -10,7 +10,8 @@ export class InternTower extends TowerBase {
   public onSelfDestroy?: (tower: InternTower) => void
 
   constructor(scene: Phaser.Scene, gridX: number, gridY: number) {
-    super(scene, gridX, gridY, 50, 1, 15, 1.5, 'tower-intern')
+    // attackRange=1.5：近战覆盖相邻格，避免格子边界浮点漏攻击
+    super(scene, gridX, gridY, 50, 1.5, 15, 1.5, 'tower-intern')
   }
 
   override update(delta: number, enemies: EnemyBase[]): void {

game/towers/TowerBase.ts

@@ -100,7 +100,8 @@ export abstract class TowerBase {
   }
 
   protected findTarget(enemies: EnemyBase[]): EnemyBase | null {
-    const rangePx = this.attackRange * this.cellW
+    // +0.5格容忍量，避免怪物恰好在射程边界时因浮点误差漏判
+    const rangePx = (this.attackRange + 0.5) * this.cellW
     let best: EnemyBase | null = null
     let bestProgress = -1
     for (const e of enemies) {