fix: 调整英雄升级所需数量，优化战斗和UI细节

1.  将英雄升级所需数量从2改为3
2.  调整UI3.plist的边框参数
3.  修改地图精灵帧和图集绑定
4.  优化技能提示框动画：减少停留时间并简化漂移淡出逻辑
5.  修改任务卡牌组件：战斗阶段不再隐藏面板，新增战斗阶段无法召唤英雄的限制，注释掉战斗阶段隐藏抽卡面板的代码
6.  重构hnode.prefab的层级和UI组件，调整等级显示样式

assets/script/game/map/MissionCardComp.ts

@@ -335,7 +335,7 @@ export class MissionCardComp extends CCComp {
         this.playCoinChangeAnim(v > 0);
     }
 
-    /** 战斗开始：收起面板，清空卡牌 */
+    /** 战斗开始：不收起面板，不再强制清空卡牌 */
     private onFightStart() {
         this.isBattlePhase = true;
         this.enterBattlePhase();
@@ -432,6 +432,14 @@ export class MissionCardComp extends CCComp {
     private onUseHeroCard(event: string, args: any) {
         const payload = args ?? event;
         if (!payload) return;
+        
+        if (this.isBattlePhase) {
+            payload.cancel = true;
+            payload.reason = "battle_phase";
+            oops.gui.toast("战斗阶段无法召唤英雄");
+            return;
+        }
+
         const current = this.getAliveHeroCount();
         this.syncMissionHeroData(current);
         const heroMax = this.getMissionHeroMaxNum();
@@ -571,10 +579,10 @@ export class MissionCardComp extends CCComp {
      *   3. 重新布局槽位 → 从卡池构建 4 张卡 → 分发到槽位。
      */
     private onClickDraw() {
-        if (this.isBattlePhase) {
-            oops.gui.toast("战斗阶段无法抽卡");
-            return;
-        }
+        // if (this.isBattlePhase) {
+        //     oops.gui.toast("战斗阶段无法抽卡");
+        //     return;
+        // }
         const cost = this.getRefreshCost();
         const currentCoin = this.getMissionCoin();
         if (currentCoin < cost) {
@@ -663,15 +671,16 @@ export class MissionCardComp extends CCComp {
     private enterBattlePhase() {
         if (!this.cards_node || !this.cards_node.isValid) return;
         this.initCardsPanelPos();
-        Tween.stopAllByTarget(this.cards_node);
-        tween(this.cards_node)
-            .to(this.cardsPanelMoveDuration, { scale: this.cardsHideScale })
-            .call(() => {
-                if (this.cards_node && this.cards_node.isValid) {
-                    this.cards_node.active = false;
-                }
-            })
-            .start();
+        // 战斗阶段不再隐藏抽卡面板
+        // Tween.stopAllByTarget(this.cards_node);
+        // tween(this.cards_node)
+        //     .to(this.cardsPanelMoveDuration, { scale: this.cardsHideScale })
+        //     .call(() => {
+        //         if (this.cards_node && this.cards_node.isValid) {
+        //             this.cards_node.active = false;
+        //         }
+        //     })
+        //     .start();
 
         this.cachedHInfoComps.forEach(comp => {
             if (comp && comp.isValid) {