fix(mining): add defensive checks for network sync undefined values

- Handle missing currentContributionPerTree with default value
- Add null checks for all network progress fields
- Prevent DecimalError when contribution service returns incomplete data

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/services/mining-service/src/application/services/network-sync.service.ts

@@ -73,10 +73,12 @@ export class NetworkSyncService {
    */
   async handleNetworkProgressUpdated(data: NetworkProgressUpdatedData): Promise<void> {
     try {
+      // 防御性检查
+      const contributionPerTree = data.currentContributionPerTree || '20';
+      const treeCount = data.totalTreeCount || 0;
+
       // 计算全网理论算力
-      const networkTotalContribution = new Decimal(data.totalTreeCount).mul(
-        data.currentContributionPerTree,
-      );
+      const networkTotalContribution = new Decimal(treeCount).mul(contributionPerTree);
 
       // 更新 MiningConfig 中的全网理论算力
       const config = await this.prisma.miningConfig.findFirst();
@@ -89,14 +91,14 @@ export class NetworkSyncService {
         where: { id: config.id },
         data: {
           networkTotalContribution: networkTotalContribution,
-          totalTreeCount: data.totalTreeCount,
-          contributionPerTree: new Decimal(data.currentContributionPerTree),
+          totalTreeCount: treeCount,
+          contributionPerTree: new Decimal(contributionPerTree),
           networkLastSyncedAt: new Date(),
         },
       });
 
       this.logger.log(
-        `Updated network progress: trees=${data.totalTreeCount}, contribution=${networkTotalContribution.toString()}`,
+        `Updated network progress: trees=${treeCount}, contribution=${networkTotalContribution.toString()}`,
       );
     } catch (error) {
       this.logger.error('Failed to update network progress', error);
@@ -144,14 +146,23 @@ export class NetworkSyncService {
       }
       const progressResult = await progressResponse.json();
 
+      // 防御性检查：确保必要字段存在
+      if (!progressResult.currentContributionPerTree) {
+        this.logger.warn(
+          `Network progress missing currentContributionPerTree, response: ${JSON.stringify(progressResult)}`,
+        );
+        // 使用默认值继续
+        progressResult.currentContributionPerTree = '20';
+      }
+
       await this.handleNetworkProgressUpdated({
-        totalTreeCount: progressResult.totalTreeCount,
-        totalAdoptionOrders: progressResult.totalAdoptionOrders,
-        totalAdoptedUsers: progressResult.totalAdoptedUsers,
-        currentUnit: progressResult.currentUnit,
-        currentMultiplier: progressResult.currentMultiplier,
+        totalTreeCount: progressResult.totalTreeCount || 0,
+        totalAdoptionOrders: progressResult.totalAdoptionOrders || 0,
+        totalAdoptedUsers: progressResult.totalAdoptedUsers || 0,
+        currentUnit: progressResult.currentUnit || 1,
+        currentMultiplier: progressResult.currentMultiplier || '1',
         currentContributionPerTree: progressResult.currentContributionPerTree,
-        nextUnitTreeCount: progressResult.nextUnitTreeCount,
+        nextUnitTreeCount: progressResult.nextUnitTreeCount || 100000,
       });
 
       // 3. 获取最新的 MiningConfig 来返回结果