fix(pre-planting): 修复 settleAfterPrePlanting 响应解包（TransformInterceptor）

wallet-service 的 TransformInterceptor 会将响应包装为 { data: {...} }，
需要从 response.data.data 中提取实际数据，与 allocatePrePlantingFunds 一致。

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/services/planting-service/src/infrastructure/external/wallet-service.client.ts

@@ -424,17 +424,15 @@ export class WalletServiceClient {
         `settleAfterPrePlanting(${accountSequence})`,
         async () => {
           const response = await firstValueFrom(
-            this.httpService.post<{
-              markedAsPlanted: boolean;
-              settledCount: number;
-              totalUsdt: number;
-              totalHashpower: number;
-            }>(
+            this.httpService.post(
               `${this.baseUrl}/api/v1/wallets/settle-after-pre-planting`,
               { accountSequence },
             ),
           );
-          return response.data;
+          // wallet-service 使用 TransformInterceptor，响应格式为
+          // { success: true, data: { markedAsPlanted, settledCount, ... }, timestamp: "..." }
+          const data = response.data?.data ?? response.data;
+          return data;
         },
       );
     } catch (error) {