fix: 修复 onCoinAdd 方法参数处理逻辑

调整事件参数处理方式，确保 payload 正确提取自 args 或 event 参数，以兼容不同调用场景。避免因参数结构不一致导致的硬币数量更新错误。

assets/script/game/map/MissionCardComp.ts

@@ -161,13 +161,14 @@ export class MissionCardComp extends CCComp {
         this.cards_up?.on(NodeEventType.TOUCH_END, this.onUpgradeTouchEnd, this);
         this.cards_up?.on(NodeEventType.TOUCH_CANCEL, this.onUpgradeTouchCancel, this);
     }
-    private onCoinAdd(args:any){
-        if (args?.syncOnly) {
+    private onCoinAdd(event: string, args: any){
+        const payload = args ?? event;
+        if (payload?.syncOnly) {
             this.updateCoinAndCostUI();
-            this.playCoinChangeAnim((args?.delta ?? 0) > 0);
+            this.playCoinChangeAnim((payload?.delta ?? 0) > 0);
             return;
         }
-        const v = typeof args === 'number' ? args : (args?.delta ?? args?.value ?? 0);
+        const v = typeof payload === 'number' ? payload : (payload?.delta ?? payload?.value ?? 0);
         if (v === 0) return;
         this.setMissionCoin(this.getMissionCoin() + v);
         this.updateCoinAndCostUI();