fix: 修正拼写错误并添加升级动画播放逻辑

- 将 `palayBuff` 方法名更正为 `playBuff`
- 在英雄升级时调用 `playAllTime` 方法播放"plus"动画
- 确保动画播放方法在参数为空时安全返回

assets/script/game/hero/HeroViewComp.ts

@@ -289,7 +289,7 @@ export class HeroViewComp extends CCComp {
     shield_tip(absorbed: number) {
         this.hp_tip(TooltipTypes.life, NumberFormatter.formatNumber(Math.max(0, Math.floor(absorbed))));
     }
-    public palayBuff(anm: string = ""){
+    public playBuff(anm: string = ""){
         if(anm==="") return;
         var path = "game/skill/buff/" + anm;
         this.spawnTimedFx(path, this.node, this.effectLifeTime);
@@ -306,7 +306,11 @@ export class HeroViewComp extends CCComp {
         var path = "game/skill/end/" + anm;
         this.spawnAnimEndFx(path, this.node, undefined);
     }
-
+    public playAllTime(anm: string = ""){
+        if(anm==="") return;
+        var path = "game/skill/buff/" + anm;
+        this.spawnAnimEndFx(path, this.node, undefined);
+    }
     /** 治疗特效 */
     private heathed() {
         this.spawnAnimEndFx("game/skill/buff/heathed", this.node, undefined);