balance: 全面提升游戏难度——怪物HP/速度/KPI扣减上调，精力消耗加快，初始HC降至150，波次加量缩间隔，Boss技能冷却12s，自动下一波等待2s

game/mapRenderer.ts

@@ -5,6 +5,7 @@ import {
   GAME_WIDTH,
   GAME_HEIGHT,
   HUD_HEIGHT,
+  INITIAL_HC,
   INITIAL_KPI,
 } from './constants'
 import type { MapConfig } from './data/mapConfigs'
@@ -222,7 +223,7 @@ export function renderHUD(scene: Phaser.Scene): {
 
   const hcText = scene.add.text(
     GAME_WIDTH - 16, HUD_HEIGHT / 2,
-    `HC: 200`,
+    `HC: ${INITIAL_HC}`,
     {
       fontFamily: "'Press Start 2P', monospace",
       fontSize: '10px',