fix(pre-planting): 修复可结算收益重复计算

pre-planting getMyRewards API 错误地将所有分配记录金额算作
settleableUsdt（包括 PENDING 状态的待领取奖励）。
预种奖励的 PENDING/SETTLEABLE 状态由 wallet-service 管理，
reward-service 的 getMyRewardSummary 已包含预种可结算部分，
不应重复累加。

修复：
- 后端 getMyRewards 返回 settleableUsdt: 0
- 前端"我"页面和"兑换"页面不再额外加预种 settleableUsdt

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

backend/services/planting-service/src/pre-planting/api/controllers/pre-planting.controller.ts

@@ -119,11 +119,14 @@ export class PrePlantingController {
     // 只返回用户账户收到的奖励（D 开头），排除系统账户
     const userEntries = entries.filter(e => e.recipientAccountSequence.startsWith('D'));
 
-    const settleableUsdt = userEntries.reduce((sum, e) => sum + e.usdtAmount, 0);
+    // settleableUsdt 设为 0：预种奖励的可结算状态由 wallet-service 管理，
+    // wallet-service 的 getSettleableRewards / getMyRewardSummary 已包含预种的可结算部分。
+    // pre_planting_reward_entries 只是分配记录，不反映实际的 PENDING/SETTLEABLE 状态。
+    // 之前错误地把所有分配记录的金额算作 settleableUsdt，导致前端重复计算。
 
     return {
       summary: {
-        settleableUsdt,
+        settleableUsdt: 0,
       },
       settleableRewards: userEntries.map(e => ({
         id: `pp-${e.sourceOrderNo}-${e.rightType}`,

frontend/mobile-app/lib/features/profile/presentation/pages/profile_page.dart

@@ -842,7 +842,8 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
         setState(() {
           _pendingUsdt = summary.pendingUsdt;
           _pendingPower = summary.pendingHashpower;
-          _settleableUsdt = summary.settleableUsdt + prePlantingRewards.settleableUsdt;
+          // 预种可结算已包含在 wallet-service 的 summary.settleableUsdt 中，不再重复加
+          _settleableUsdt = summary.settleableUsdt;
           // 使用流水统计的数据，更准确
           _settledUsdt = settledFromLedger;
           _expiredUsdt = summary.expiredTotalUsdt;

frontend/mobile-app/lib/features/trading/presentation/pages/trading_page.dart

@@ -2,7 +2,6 @@ import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:go_router/go_router.dart';
 import '../../../../core/di/injection_container.dart';
-import '../../../../core/services/pre_planting_service.dart';
 import '../../../../routes/route_paths.dart';
 
 /// 结算币种枚举
@@ -39,33 +38,27 @@ class _TradingPageState extends ConsumerState<TradingPage> {
     try {
       debugPrint('[TradingPage] 开始加载数据...');
 
-      // 并行获取：正常认种可结算 + 预种可结算 + 钱包余额
+      // reward-service 的 settleableUsdt 已包含预种可结算部分（均由 wallet-service 管理）
       final rewardService = ref.read(rewardServiceProvider);
-      final prePlantingService = ref.read(prePlantingServiceProvider);
       final walletService = ref.read(walletServiceProvider);
 
       final results = await Future.wait([
         rewardService.getMyRewardSummary(),
-        prePlantingService.getMyRewards(),
         walletService.getMyWallet(),
       ]);
 
       final summary = results[0] as dynamic;
-      final prePlantingRewards = results[1] as PrePlantingMyRewards;
-      final wallet = results[2] as dynamic;
+      final wallet = results[1] as dynamic;
 
       if (mounted) {
         setState(() {
-          // 聚合正常认种 + 预种的可结算收益
-          _settleableAmount = summary.settleableUsdt + prePlantingRewards.settleableUsdt;
+          _settleableAmount = summary.settleableUsdt;
           _dstBalance = wallet.balances.dst.available;
           _usdtBalance = wallet.balances.usdt.available;
           _isLoading = false;
         });
         debugPrint('[TradingPage] 数据加载成功:');
-        debugPrint('[TradingPage]   正常认种可结算: ${summary.settleableUsdt}');
-        debugPrint('[TradingPage]   预种可结算: ${prePlantingRewards.settleableUsdt}');
-        debugPrint('[TradingPage]   合计可结算 USDT: $_settleableAmount');
+        debugPrint('[TradingPage]   可结算 USDT: $_settleableAmount');
         debugPrint('[TradingPage]   DST 余额: $_dstBalance');
         debugPrint('[TradingPage]   USDT 余额: $_usdtBalance');
       }