优化总点数显示逻辑，调整初始值为null并从API获取真实数据，改进游戏界面状态处理，提升用户体验

src/components/play/SelectRegion.vue

@@ -16,7 +16,7 @@
         <div class="detail-value region-value">{{ selectedRegion || '未选择' }}</div>
         <div class="detail-value">待选区</div>
         <div class="detail-value">{{ mecmachineId || '待分配' }}</div>
-        <div class="detail-value points-value">{{ totalPoints || 4000 }}</div>
+        <div class="detail-value points-value">{{ displayTotalPoints }}</div>
       </div>
     </div>
 
@@ -92,7 +92,7 @@ export default {
     },
     totalPoints: {
       type: Number,
-      default: 4000
+      default: null
     }
   },
   data() {
@@ -103,6 +103,16 @@ export default {
     }
   },
   emits: ['selectRegion'],
+  computed: {
+    displayTotalPoints() {
+      // 如果 totalPoints 为 null 或 undefined，显示"待分配"
+      // 注意：0 是有效值，应该显示
+      if (this.totalPoints === null || this.totalPoints === undefined) {
+        return '待分配'
+      }
+      return this.totalPoints
+    }
+  },
   methods: {
     selectRegionOption(code) {
       this.regionCode = code