refactor(config,map): 统一抽离卡片背景颜色配置

将多处硬编码的卡片等级背景颜色数组移至公共配置文件，
同时重构英雄列表组件的等级显示逻辑，替换为标签直接赋值。

assets/script/game/map/CardLiteComp.ts

@@ -26,13 +26,12 @@ import { CardConfig, CardType, SpecialRefreshCardList, SpecialUpgradeCardList, C
 import { SkillCardList } from "../common/config/SCardSet";
 import { HeroInfo } from "../common/config/heroSet";
 import { SkillSet } from "../common/config/SkillSet";
-import { getLvColor } from "../common/config/GameSet";
+import { getLvColor, CARD_LV_BG_COLORS } from "../common/config/GameSet";
 import { smc } from "../common/SingletonModuleComp";
 
 const { ccclass, property } = _decorator;
 
-/** card_lv → BG_node 子节点（颜色）名映射：1=green 2=blue 3=purple 4=yellow 5=red */
-const BG_COLORS = ["green", "blue", "purple", "yellow", "red"];
+/** card_lv → BG_node 子节点（颜色）名映射已移至 GameSet.CARD_LV_BG_COLORS */
 
 /**
  * CardLiteComp —— 单张卡牌简单视图组件
@@ -225,7 +224,7 @@ export class CardLiteComp extends CCComp {
         // 背景：按 card_lv 切换颜色底框（BG_node 下为 green/blue/purple/yellow/red 子节点）
         if (this.BG_node) {
             const bgLv = Math.min(Math.max(this.cardData.base_card_lv ?? this.cardData.card_lv ?? 1, 1), 5);
-            const color = BG_COLORS[bgLv - 1];
+            const color = CARD_LV_BG_COLORS[bgLv - 1];
             this.BG_node.children.forEach(child => child.active = (child.name === color));
         }