feat(mining): 添加 perSecondEarning 到挖矿账户 API

- 后端：计算每秒收益 = (用户贡献 / 全网贡献) × 每秒分配量
- 前端：修正字段映射以匹配后端返回格式

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

backend/services/mining-service/src/application/queries/get-mining-account.query.ts

@@ -1,5 +1,6 @@
 import { Injectable } from '@nestjs/common';
 import { MiningAccountRepository } from '../../infrastructure/persistence/repositories/mining-account.repository';
+import { MiningConfigRepository } from '../../infrastructure/persistence/repositories/mining-config.repository';
 import { PrismaService } from '../../infrastructure/persistence/prisma/prisma.service';
 
 export interface MiningAccountDto {
@@ -9,6 +10,7 @@ export interface MiningAccountDto {
   frozenBalance: string;
   totalBalance: string;
   totalContribution: string;
+  perSecondEarning: string;  // 每秒收益 = (用户贡献 / 全网贡献) × 每秒分配量
   lastSyncedAt: Date | null;
 }
 
@@ -38,6 +40,7 @@ export interface MiningTransactionDto {
 export class GetMiningAccountQuery {
   constructor(
     private readonly accountRepository: MiningAccountRepository,
+    private readonly configRepository: MiningConfigRepository,
     private readonly prisma: PrismaService,
   ) {}
 
@@ -47,6 +50,24 @@ export class GetMiningAccountQuery {
       return null;
     }
 
+    // 计算每秒收益 = (用户贡献 / 全网贡献) × 每秒分配量
+    let perSecondEarning = '0';
+    try {
+      const [config, totalContribution] = await Promise.all([
+        this.configRepository.getConfig(),
+        this.accountRepository.getTotalContribution(),
+      ]);
+
+      if (config && totalContribution.toNumber() > 0) {
+        const userContribution = account.totalContribution.toNumber();
+        const secondDistribution = config.secondDistribution.toNumber();
+        const ratio = userContribution / totalContribution.toNumber();
+        perSecondEarning = (ratio * secondDistribution).toFixed(8);
+      }
+    } catch {
+      // 如果计算失败，返回 0
+    }
+
     return {
       accountSequence: account.accountSequence,
       totalMined: account.totalMined.toString(),
@@ -54,6 +75,7 @@ export class GetMiningAccountQuery {
       frozenBalance: account.frozenBalance.toString(),
       totalBalance: account.totalBalance.toString(),
       totalContribution: account.totalContribution.toString(),
+      perSecondEarning,
       lastSyncedAt: account.lastSyncedAt,
     };
   }

frontend/mining-app/lib/data/models/share_account_model.dart

@@ -14,12 +14,15 @@ class ShareAccountModel extends ShareAccount {
   factory ShareAccountModel.fromJson(Map<String, dynamic> json) {
     return ShareAccountModel(
       accountSequence: json['accountSequence']?.toString() ?? '',
-      miningBalance: json['miningBalance']?.toString() ?? '0',
-      tradingBalance: json['tradingBalance']?.toString() ?? '0',
+      // 后端返回 availableBalance，映射到 miningBalance
+      miningBalance: json['availableBalance']?.toString() ?? json['miningBalance']?.toString() ?? '0',
+      // 后端返回 totalBalance，映射到 tradingBalance（可交易余额）
+      tradingBalance: json['totalBalance']?.toString() ?? json['tradingBalance']?.toString() ?? '0',
       frozenBalance: json['frozenBalance']?.toString() ?? '0',
       totalMined: json['totalMined']?.toString() ?? '0',
       perSecondEarning: json['perSecondEarning']?.toString() ?? '0',
-      effectiveContribution: json['effectiveContribution']?.toString() ?? '0',
+      // 后端返回 totalContribution，映射到 effectiveContribution
+      effectiveContribution: json['totalContribution']?.toString() ?? json['effectiveContribution']?.toString() ?? '0',
     );
   }