update pay function

src/views/ValueForum/PredictionTopicDetail.js

@@ -140,9 +140,17 @@ const PredictionTopicDetail = () => {
     return null;
   }
 
-  // 获取选项数据
-  const yesData = topic.positions?.yes || { total_shares: 0, current_price: 500, lord_id: null };
-  const noData = topic.positions?.no || { total_shares: 0, current_price: 500, lord_id: null };
+  // 获取选项数据（从后端扁平结构映射到前端使用的嵌套结构）
+  const yesData = {
+    total_shares: topic.yes_total_shares || 0,
+    current_price: topic.yes_price || 500,
+    lord_id: topic.yes_lord_id || null,
+  };
+  const noData = {
+    total_shares: topic.no_total_shares || 0,
+    current_price: topic.no_price || 500,
+    lord_id: topic.no_lord_id || null,
+  };
 
   // 计算总份额
   const totalShares = yesData.total_shares + noData.total_shares;