Revert "fix(mining-wallet): auto-create HEADQUARTERS account, skip DEFAULT province/city"

This reverts commit bf004bab52.

backend/services/mining-wallet-service/src/application/services/contribution-wallet.service.ts

@@ -302,12 +302,6 @@ export class ContributionWalletService {
     provinceCode?: string,
     cityCode?: string,
   ): Promise<any | null> {
-    // 跳过 DEFAULT 占位符
-    if (provinceCode === 'DEFAULT' || cityCode === 'DEFAULT') {
-      this.logger.debug('Skipping DEFAULT province/city code');
-      return null;
-    }
-
     // 只处理省/市级账户的自动创建
     if (accountType === 'PROVINCE' && provinceCode) {
       // 先找或创建省份
@@ -400,26 +394,7 @@ export class ContributionWalletService {
       return account;
     }
 
-    // HEADQUARTERS 自动创建
-    if (accountType === 'HEADQUARTERS') {
-      let account = await tx.systemAccount.findFirst({
-        where: { accountType: 'HEADQUARTERS' },
-      });
-      if (!account) {
-        account = await tx.systemAccount.create({
-          data: {
-            accountType: 'HEADQUARTERS',
-            name: '总部账户',
-            code: 'HQ',
-            isActive: true,
-          },
-        });
-        this.logger.log('Auto-created HEADQUARTERS system account');
-      }
-      return account;
-    }
-
-    // 其他类型（OPERATION, FEE）不自动创建，需要在 seed 中初始化
+    // 其他类型（HEADQUARTERS, OPERATION, FEE）不自动创建，需要在 seed 中初始化
     return null;
   }
 }