fix: 修复英雄卡牌费用标签显示异常的问题

移除对英雄卡牌隐藏费用标签的特殊处理，统一显示所有卡牌的费用标签，确保界面一致性。

assets/script/game/map/CardComp.ts

@@ -878,15 +878,11 @@ export class CardComp extends CCComp {
         }
 
         // ---- 费用标签 ----
-        if (this.card_type === CardType.Hero) {
-            if (this.cost_node) this.cost_node.active = false;
-        } else {
-            if (this.cost_node) {
-                this.cost_node.active = true;
-                const numNode = this.cost_node.getChildByName("num");
-                if (numNode) {
-                    this.setLabel(numNode, `${this.card_cost}`);
-                }
+        if (this.cost_node) {
+            this.cost_node.active = true;
+            const numNode = this.cost_node.getChildByName("num");
+            if (numNode) {
+                this.setLabel(numNode, `${this.card_cost}`);
             }
         }