refactor(hero card): add card_lv background color logic

1. 新增updateBgNode方法根据card_lv切换英雄背景节点颜色
2. 为所有基础卡牌配置补充缺失的card_lv字段
3. 调整配置项字段顺序保持代码整洁

assets/script/game/map/CHeroComp.ts

@@ -292,6 +292,9 @@ export class CHeroComp extends CCComp {
             }
         }
 
+        // 背景：按 card_lv 激活对应颜色子节点（1→green 2→blue 3→purple 4→red 5→yellow）
+        this.updateBgNode();
+
         // 描述词条（最多显示 3 条，对应 fied1/fied2/fied3）
         const fieldLabels = [this.fied1, this.fied2, this.fied3];
         const desc = hero?.info || this.cardData.info || "";
@@ -321,6 +324,30 @@ export class CHeroComp extends CCComp {
         this.playEnterAnim();
     }
 
+    /**
+     * 根据 card_lv 切换 bg_node 下的颜色子节点显示。
+     * 等级与颜色对应关系：
+     *   card_lv 1 → green
+     *   card_lv 2 → blue
+     *   card_lv 3 → purple
+     *   card_lv 4 → red
+     *   card_lv 5 → yellow
+     */
+    private updateBgNode() {
+        if (!this.bg_node || !this.cardData) return;
+        const lvToColor: Record<number, string> = {
+            1: "green",
+            2: "blue",
+            3: "purple",
+            4: "red",
+            5: "yellow",
+        };
+        const targetColor = lvToColor[this.cardData.card_lv ?? 1];
+        this.bg_node.children.forEach(child => {
+            child.active = (child.name === targetColor);
+        });
+    }
+
     // ======================== 动画效果 ========================
 
     /** 入场动画时长（秒） */