feat(game/GameManager): 新增难度字段、地图索引和波次计数

game/GameManager.ts

@@ -2,6 +2,7 @@ import {
   INITIAL_HC,
   INITIAL_KPI,
 } from './constants'
+import type { DifficultyLevel } from './data/mapConfigs'
 
 type GameState = 'idle' | 'playing' | 'paused' | 'victory' | 'defeat'
 
@@ -17,6 +18,11 @@ export class GameManager {
   public currentWave: number = 0
   public gameState: GameState = 'idle'
 
+  // 难度与地图状态
+  public difficulty: DifficultyLevel = 'normal'
+  public currentMapIndex: number = 0    // 0=地图1, 1=地图2, 2=地图3
+  public totalWaveCleared: number = 0   // 总计已清理波次
+
   // 事件回调（Scene 通过这些 hook 更新 HUD）
   public onHCChange: ((hc: number) => void)[] = []
   public onKPIChange: ((kpi: number) => void)[] = []
@@ -32,21 +38,28 @@ export class GameManager {
     return GameManager.instance
   }
 
-  /** 重置游戏状态（新局开始时调用） */
+  /** 设置难度 */
+  setDifficulty(d: DifficultyLevel): void {
+    this.difficulty = d
+  }
+
+  /** 重置游戏状态（保留难度，重置其他字段） */
   reset(): void {
     this.hc = INITIAL_HC
     this.kpi = INITIAL_KPI
     this.currentWave = 0
     this.gameState = 'idle'
+    this.currentMapIndex = 0
+    this.totalWaveCleared = 0
     this.onHCChange = []
     this.onKPIChange = []
     this.onGameOver = []
     this.onVictory = []
+    // difficulty 保留，不重置
   }
 
   /**
    * 扣除 HC，余额不足时返回 false
-   * @param amount 扣除数量
    */
   spendHC(amount: number): boolean {
     if (this.hc < amount) return false
@@ -57,7 +70,6 @@ export class GameManager {
 
   /**
    * 增加 HC
-   * @param amount 增加数量
    */
   addHC(amount: number): void {
     this.hc += amount
@@ -66,7 +78,6 @@ export class GameManager {
 
   /**
    * 减少 KPI，归零时触发 GameOver
-   * @param amount 减少数量
    */
   reduceKPI(amount: number): void {
     this.kpi = Math.max(0, this.kpi - amount)
@@ -79,7 +90,6 @@ export class GameManager {
 
   /**
    * 增加 KPI（不超过 100）
-   * @param amount 增加数量
    */
   addKPI(amount: number): void {
     this.kpi = Math.min(100, this.kpi + amount)