fix(game): 关卡切换时重置HC为200，不带入上一关余量，修复游戏平衡性问题

game/GameManager.ts

@@ -58,6 +58,12 @@ export class GameManager {
     // difficulty 保留，不重置
   }
 
+  /** 重置 HC 到初始值（进入下一关时调用，不带入上一关的余量） */
+  resetHC(): void {
+    this.hc = INITIAL_HC
+    this.onHCChange.forEach(cb => cb(this.hc))
+  }
+
   /**
    * 扣除 HC，余额不足时返回 false
    */

game/GameScene.ts

@@ -399,6 +399,8 @@ export function createGameScene(PhaserLib: typeof Phaser): typeof Phaser.Scene {
         this.waveManager.clearAllEnemies()
         // 清除上一关所有防御塔
         this.towerManager.clearAllTowers()
+        // 重置 HC：每关重新开始，不带入上关余量
+        this.manager.resetHC()
         this.loadMap(ALL_MAPS[nextIndex])
         this.hud.enableWaveButton()
         this.hud.setWaveButtonText('▶ 召唤下一波')

game/ui/MapTransitionModal.ts

@@ -33,7 +33,6 @@ export class MapTransitionModal {
   ): void {
     const manager = GameManager.getInstance()
     const kpi = manager.kpi
-    const hcReward = 100
 
     const overlay = document.createElement('div')
     overlay.id = 'map-transition-overlay'
@@ -92,9 +91,9 @@ export class MapTransitionModal {
     `
     card.appendChild(hr)
 
-    // KPI & 奖励
+    // KPI & 说明
     const statsEl = document.createElement('div')
-    statsEl.innerHTML = `KPI: <span style="color:#34d399">${kpi}%</span> &nbsp;|&nbsp; 获得奖励: <span style="color:#fbbf24">+${hcReward} HC</span>`
+    statsEl.innerHTML = `最终KPI: <span style="color:#34d399">${kpi}%</span> &nbsp;|&nbsp; <span style="color:#94a3b8">HC 将重置为 200</span>`
     statsEl.style.cssText = `
       font-size: 20px;
       color: #e2e8f0;
@@ -129,10 +128,10 @@ export class MapTransitionModal {
     }
     card.appendChild(nextEl)
 
-    // 倒计时提示
+    // 倒计时提示（HC 重置提醒）
     const countdownEl = document.createElement('div')
     countdownEl.id = 'mt-countdown'
-    countdownEl.textContent = isFinalMap ? '3秒后返回主菜单...' : '3秒后自动进入下一关...'
+    countdownEl.textContent = isFinalMap ? '3秒后返回主菜单...' : '3秒后进入下一关，HC重置为200...'
     countdownEl.style.cssText = `
       font-size: 16px;
       color: #6b7280;
@@ -151,9 +150,6 @@ export class MapTransitionModal {
     document.body.appendChild(overlay)
     this.container = overlay
 
-    // 给 HC 奖励
-    manager.addHC(hcReward)
-
     // 3秒自动触发
     let remaining = 3
     const tick = () => {
@@ -161,7 +157,7 @@ export class MapTransitionModal {
       const el = document.getElementById('mt-countdown')
       if (el) el.textContent = isFinalMap
         ? `${remaining}秒后返回主菜单...`
-        : `${remaining}秒后自动进入下一关...`
+        : `${remaining}秒后进入下一关，HC重置为200...`
     }
     const interval = setInterval(tick, 1000)
     this.autoCloseTimer = setTimeout(() => {