feat(c2c): 订单详情增强、付款水单上传、买单逻辑修复及schema对齐

- 订单详情页显示完整手机号和收款账号信息
- 新增付款水单上传功能（前后端全链路）
- 修复时间显示为本地时区格式
- 移除买单发布时的积分值余额验证（买方通过外部绿积分支付）
- 前端买单发布页隐藏余额卡片和"全部"按钮
- 补齐 Prisma migration 与 schema 差异（payment_proof_url、
  bot_purchased索引、market_maker_deposits/withdraws表）
- docker-compose 新增 trading-uploads 卷用于水单持久化

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

backend/services/docker-compose.2.0.yml

@@ -121,6 +121,8 @@ services:
       FUSDT_MARKET_MAKER_ADDRESS: ${FUSDT_MARKET_MAKER_ADDRESS:-}
       EUSDT_MARKET_MAKER_USERNAME: ${EUSDT_MARKET_MAKER_USERNAME:-}
       EUSDT_MARKET_MAKER_ADDRESS: ${EUSDT_MARKET_MAKER_ADDRESS:-}
+    volumes:
+      - trading-uploads:/app/uploads
     ports:
       - "3022:3022"
     healthcheck:
@@ -349,6 +351,8 @@ services:
 volumes:
   mining-admin-uploads:
     driver: local
+  trading-uploads:
+    driver: local
 
 networks:
   rwa-network:

backend/services/trading-service/prisma/migrations/0006_add_missing_tables_and_fields/migration.sql

@@ -0,0 +1,100 @@
+-- ============================================================================
+-- 补齐 schema 与 migration 的差异
+-- 新增: payment_proof_url 字段, bot_purchased 索引,
+--       做市商充提记录表 (market_maker_deposits, market_maker_withdraws)
+-- ============================================================================
+
+-- 1. c2c_orders: 补充 payment_proof_url 字段
+ALTER TABLE "c2c_orders" ADD COLUMN "payment_proof_url" TEXT;
+
+-- 2. c2c_orders: 补充 bot_purchased 索引
+CREATE INDEX "c2c_orders_bot_purchased_idx" ON "c2c_orders"("bot_purchased");
+
+-- 3. 创建 MarketMakerAssetType 枚举
+CREATE TYPE "MarketMakerAssetType" AS ENUM ('EUSDT', 'FUSDT');
+
+-- 4. 创建 MarketMakerDepositStatus 枚举
+CREATE TYPE "MarketMakerDepositStatus" AS ENUM ('DETECTED', 'CONFIRMING', 'CONFIRMED', 'CREDITED', 'FAILED');
+
+-- 5. 创建 MarketMakerWithdrawStatus 枚举
+CREATE TYPE "MarketMakerWithdrawStatus" AS ENUM ('PENDING', 'SIGNING', 'SIGNED', 'BROADCAST', 'CONFIRMING', 'COMPLETED', 'FAILED', 'CANCELLED');
+
+-- 6. 创建 market_maker_deposits 表
+CREATE TABLE "market_maker_deposits" (
+    "id" TEXT NOT NULL,
+    "market_maker_id" TEXT NOT NULL,
+    "chain_type" VARCHAR(20) NOT NULL,
+    "tx_hash" VARCHAR(66) NOT NULL,
+    "block_number" BIGINT NOT NULL,
+    "block_timestamp" TIMESTAMP(3) NOT NULL,
+    "asset_type" "MarketMakerAssetType" NOT NULL,
+    "token_contract" VARCHAR(42) NOT NULL,
+    "from_address" VARCHAR(42) NOT NULL,
+    "to_address" VARCHAR(42) NOT NULL,
+    "amount" DECIMAL(36,8) NOT NULL,
+    "amount_raw" DECIMAL(78,0) NOT NULL,
+    "confirmations" INTEGER NOT NULL DEFAULT 0,
+    "required_confirms" INTEGER NOT NULL DEFAULT 12,
+    "status" "MarketMakerDepositStatus" NOT NULL DEFAULT 'DETECTED',
+    "credited_at" TIMESTAMP(3),
+    "credited_amount" DECIMAL(36,8),
+    "ledger_id" TEXT,
+    "error_message" TEXT,
+    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updated_at" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "market_maker_deposits_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE UNIQUE INDEX "market_maker_deposits_tx_hash_key" ON "market_maker_deposits"("tx_hash");
+CREATE INDEX "market_maker_deposits_market_maker_id_idx" ON "market_maker_deposits"("market_maker_id");
+CREATE INDEX "market_maker_deposits_status_idx" ON "market_maker_deposits"("status");
+CREATE INDEX "market_maker_deposits_chain_type_status_idx" ON "market_maker_deposits"("chain_type", "status");
+CREATE INDEX "market_maker_deposits_asset_type_idx" ON "market_maker_deposits"("asset_type");
+CREATE INDEX "market_maker_deposits_block_number_idx" ON "market_maker_deposits"("block_number");
+CREATE INDEX "market_maker_deposits_created_at_idx" ON "market_maker_deposits"("created_at" DESC);
+
+-- AddForeignKey
+ALTER TABLE "market_maker_deposits" ADD CONSTRAINT "market_maker_deposits_market_maker_id_fkey" FOREIGN KEY ("market_maker_id") REFERENCES "market_maker_configs"("id") ON DELETE RESTRICT ON UPDATE CASCADE;
+
+-- 7. 创建 market_maker_withdraws 表
+CREATE TABLE "market_maker_withdraws" (
+    "id" TEXT NOT NULL,
+    "withdraw_no" TEXT NOT NULL,
+    "market_maker_id" TEXT NOT NULL,
+    "asset_type" "MarketMakerAssetType" NOT NULL,
+    "amount" DECIMAL(36,8) NOT NULL,
+    "chain_type" VARCHAR(20) NOT NULL,
+    "token_contract" VARCHAR(42) NOT NULL,
+    "from_address" VARCHAR(42) NOT NULL,
+    "to_address" VARCHAR(42) NOT NULL,
+    "tx_hash" VARCHAR(66),
+    "block_number" BIGINT,
+    "confirmations" INTEGER NOT NULL DEFAULT 0,
+    "gas_used" DECIMAL(36,0),
+    "gas_price" DECIMAL(36,0),
+    "status" "MarketMakerWithdrawStatus" NOT NULL DEFAULT 'PENDING',
+    "ledger_id" TEXT,
+    "error_message" TEXT,
+    "retry_count" INTEGER NOT NULL DEFAULT 0,
+    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updated_at" TIMESTAMP(3) NOT NULL,
+    "signed_at" TIMESTAMP(3),
+    "broadcast_at" TIMESTAMP(3),
+    "completed_at" TIMESTAMP(3),
+    "cancelled_at" TIMESTAMP(3),
+
+    CONSTRAINT "market_maker_withdraws_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE UNIQUE INDEX "market_maker_withdraws_withdraw_no_key" ON "market_maker_withdraws"("withdraw_no");
+CREATE INDEX "market_maker_withdraws_market_maker_id_idx" ON "market_maker_withdraws"("market_maker_id");
+CREATE INDEX "market_maker_withdraws_status_idx" ON "market_maker_withdraws"("status");
+CREATE INDEX "market_maker_withdraws_asset_type_idx" ON "market_maker_withdraws"("asset_type");
+CREATE INDEX "market_maker_withdraws_tx_hash_idx" ON "market_maker_withdraws"("tx_hash");
+CREATE INDEX "market_maker_withdraws_created_at_idx" ON "market_maker_withdraws"("created_at" DESC);
+
+-- AddForeignKey
+ALTER TABLE "market_maker_withdraws" ADD CONSTRAINT "market_maker_withdraws_market_maker_id_fkey" FOREIGN KEY ("market_maker_id") REFERENCES "market_maker_configs"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

backend/services/trading-service/prisma/schema.prisma

@@ -679,6 +679,9 @@ model C2cOrder {
   paymentDeadline       DateTime?     @map("payment_deadline")     // 付款截止时间
   confirmDeadline       DateTime?     @map("confirm_deadline")     // 确认收款截止时间
 
+  // 付款水单（买方上传的付款凭证图片）
+  paymentProofUrl       String?       @map("payment_proof_url")
+
   // ============ Bot 自动购买相关 ============
   // 卖家 Kava 地址（从 SyncedUser 表获取，用于接收 dUSDT）
   sellerKavaAddress     String?       @map("seller_kava_address")

backend/services/trading-service/src/api/controllers/c2c.controller.ts

@@ -6,16 +6,25 @@ import {
   Query,
   Body,
   Req,
+  Res,
   HttpCode,
   HttpStatus,
+  UseInterceptors,
+  UploadedFile,
+  BadRequestException,
+  NotFoundException,
 } from '@nestjs/common';
+import { FileInterceptor } from '@nestjs/platform-express';
 import {
   ApiTags,
   ApiOperation,
   ApiResponse,
   ApiParam,
   ApiBearerAuth,
+  ApiConsumes,
 } from '@nestjs/swagger';
+import * as path from 'path';
+import * as fs from 'fs';
 import { C2cService } from '../../application/services/c2c.service';
 import {
   CreateC2cOrderDto,
@@ -57,6 +66,8 @@ export class C2cController {
       paymentAccount: order.paymentAccount || undefined,
       paymentQrCode: order.paymentQrCode || undefined,
       paymentRealName: order.paymentRealName || undefined,
+      // 付款水单
+      paymentProofUrl: order.paymentProofUrl || undefined,
       // 卖家 Kava 地址
       sellerKavaAddress: order.sellerKavaAddress || undefined,
       // 超时信息
@@ -250,4 +261,53 @@ export class C2cController {
     const order = await this.c2cService.confirmReceived(orderNo, accountSequence);
     return this.toResponseDto(order);
   }
+
+  @Post('orders/:orderNo/upload-proof')
+  @HttpCode(HttpStatus.OK)
+  @UseInterceptors(FileInterceptor('file', {
+    limits: { fileSize: 10 * 1024 * 1024 }, // 10MB
+    fileFilter: (_req: any, file: any, cb: any) => {
+      if (!file.mimetype.match(/^image\/(jpeg|png|gif|webp)$/)) {
+        cb(new BadRequestException('仅支持 JPEG/PNG/GIF/WebP 图片'), false);
+      } else {
+        cb(null, true);
+      }
+    },
+  }))
+  @ApiOperation({ summary: '上传付款水单（买方操作）' })
+  @ApiConsumes('multipart/form-data')
+  @ApiParam({ name: 'orderNo', description: '订单号' })
+  @ApiResponse({ status: 200, description: '上传成功' })
+  async uploadPaymentProof(
+    @Param('orderNo') orderNo: string,
+    @UploadedFile() file: Express.Multer.File,
+    @Req() req: any,
+  ): Promise<C2cOrderResponseDto> {
+    const accountSequence = req.user?.accountSequence;
+    if (!accountSequence) {
+      throw new Error('Unauthorized');
+    }
+    if (!file) {
+      throw new BadRequestException('请上传付款水单图片');
+    }
+
+    const order = await this.c2cService.uploadPaymentProof(orderNo, accountSequence, file);
+    return this.toResponseDto(order);
+  }
+
+  @Get('proofs/:filename')
+  @ApiOperation({ summary: '获取付款水单图片' })
+  @ApiParam({ name: 'filename', description: '文件名' })
+  async getProofImage(
+    @Param('filename') filename: string,
+    @Res() res: any,
+  ): Promise<void> {
+    // 防止路径遍历攻击
+    const safeName = path.basename(filename);
+    const filePath = path.resolve('./uploads/c2c-proofs', safeName);
+    if (!fs.existsSync(filePath)) {
+      throw new NotFoundException('文件不存在');
+    }
+    res.sendFile(filePath);
+  }
 }

backend/services/trading-service/src/api/dto/c2c.dto.ts

@@ -169,6 +169,8 @@ export class C2cOrderResponseDto {
   paymentAccount?: string;
   paymentQrCode?: string;
   paymentRealName?: string;
+  // 付款水单
+  paymentProofUrl?: string;
   // 卖家 Kava 地址（绿积分转账地址）
   sellerKavaAddress?: string;
   // 超时信息

backend/services/trading-service/src/application/services/c2c.service.ts

@@ -1,4 +1,6 @@
 import { Injectable, Logger, BadRequestException, NotFoundException, ForbiddenException } from '@nestjs/common';
+import * as fs from 'fs';
+import * as path from 'path';
 import { C2cOrderRepository, C2cOrderEntity } from '../../infrastructure/persistence/repositories/c2c-order.repository';
 import { TradingAccountRepository } from '../../infrastructure/persistence/repositories/trading-account.repository';
 import { RedisService } from '../../infrastructure/redis/redis.service';
@@ -138,12 +140,7 @@ export class C2cService {
 
       // 检查余额并冻结资产
       if (type === C2C_ORDER_TYPE.BUY) {
-        // #16: 买入订单：验证积分值余额（买方通过外部系统支付绿积分）
+        // 买入订单：买方通过外部系统支付绿积分，不需要验证积分值余额也不冻结
-        const totalAmountMoney = new Money(totalAmount);
-        if (account.availableCash.isLessThan(totalAmountMoney)) {
-          throw new BadRequestException(`积分值余额不足，需要 ${totalAmount.toString()}，可用 ${account.availableCash.toString()}`);
-        }
-        // #12: 不冻结（买方通过外部1.0系统支付绿积分，系统无法冻结外部资产）
       } else {
         // 卖出订单：需要冻结积分值（C2C交易的是积分值）
         const quantityMoney = new Money(quantityDecimal);
@@ -618,6 +615,52 @@ export class C2cService {
     return order;
   }
 
+  /**
+   * 上传付款水单（买方操作）
+   */
+  async uploadPaymentProof(
+    orderNo: string,
+    accountSequence: string,
+    file: { buffer: Buffer; originalname: string; mimetype: string },
+  ): Promise<C2cOrderEntity> {
+    const order = await this.c2cOrderRepository.findByOrderNo(orderNo);
+    if (!order) {
+      throw new NotFoundException('订单不存在');
+    }
+
+    // 只有 MATCHED 或 PAID 状态可以上传水单
+    if (order.status !== C2C_ORDER_STATUS.MATCHED && order.status !== C2C_ORDER_STATUS.PAID) {
+      throw new BadRequestException('当前订单状态不允许上传水单');
+    }
+
+    // 确定买方身份
+    const buyerAccountSequence = order.type === C2C_ORDER_TYPE.BUY
+      ? order.makerAccountSequence
+      : order.takerAccountSequence;
+
+    if (accountSequence !== buyerAccountSequence) {
+      throw new ForbiddenException('只有买方可以上传付款水单');
+    }
+
+    // 保存文件到本地
+    const uploadDir = path.resolve('./uploads/c2c-proofs');
+    if (!fs.existsSync(uploadDir)) {
+      fs.mkdirSync(uploadDir, { recursive: true });
+    }
+
+    const ext = path.extname(file.originalname) || '.jpg';
+    const filename = `${orderNo}-${Date.now()}${ext}`;
+    const filePath = path.join(uploadDir, filename);
+    fs.writeFileSync(filePath, file.buffer);
+
+    // 生成访问URL（通过 API 网关访问）
+    const proofUrl = `/api/v2/trading/c2c/proofs/${filename}`;
+
+    const updated = await this.c2cOrderRepository.updatePaymentProof(orderNo, proofUrl);
+    this.logger.log(`C2C订单上传付款水单: ${orderNo}, file: ${filename}`);
+    return updated!;
+  }
+
   /**
    * 处理超时订单（由定时任务调用）
    */

backend/services/trading-service/src/infrastructure/persistence/repositories/c2c-order.repository.ts

@@ -48,6 +48,8 @@ export interface C2cOrderEntity {
   confirmTimeoutMinutes: number;
   paymentDeadline?: Date | null;
   confirmDeadline?: Date | null;
+  // 付款水单
+  paymentProofUrl?: string | null;
   // Bot 自动购买相关
   sellerKavaAddress?: string | null;
   botPurchased: boolean;
@@ -153,6 +155,8 @@ export class C2cOrderRepository {
       // #13: 部分成交时更新数量和金额
       quantity: string;
       totalAmount: string;
+      // 付款水单
+      paymentProofUrl: string;
       // 超时时间
       paymentDeadline: Date;
       confirmDeadline: Date;
@@ -323,6 +327,17 @@ export class C2cOrderRepository {
     return this.toEntity(record);
   }
 
+  /**
+   * 更新付款水单URL
+   */
+  async updatePaymentProof(orderNo: string, paymentProofUrl: string): Promise<C2cOrderEntity | null> {
+    const record = await this.prisma.c2cOrder.update({
+      where: { orderNo },
+      data: { paymentProofUrl },
+    });
+    return this.toEntity(record);
+  }
+
   /**
    * 将Prisma记录转为实体
    */
@@ -355,6 +370,8 @@ export class C2cOrderRepository {
       confirmTimeoutMinutes: record.confirmTimeoutMinutes,
       paymentDeadline: record.paymentDeadline,
       confirmDeadline: record.confirmDeadline,
+      // 付款水单
+      paymentProofUrl: record.paymentProofUrl,
       // Bot 自动购买相关
       sellerKavaAddress: record.sellerKavaAddress,
       botPurchased: record.botPurchased,

frontend/mining-app/lib/core/network/api_endpoints.dart

@@ -71,6 +71,7 @@ class ApiEndpoints {
   static String c2cCancelOrder(String orderNo) => '/api/v2/trading/c2c/orders/$orderNo/cancel';
   static String c2cConfirmPayment(String orderNo) => '/api/v2/trading/c2c/orders/$orderNo/confirm-payment';
   static String c2cConfirmReceived(String orderNo) => '/api/v2/trading/c2c/orders/$orderNo/confirm-received';
+  static String c2cUploadProof(String orderNo) => '/api/v2/trading/c2c/orders/$orderNo/upload-proof';
 
   // Contribution Service 2.0 (Kong路由: /api/v2/contribution -> /api/v1/contributions)
   static const String contributionStats = '/api/v2/contribution/stats';

frontend/mining-app/lib/core/utils/date_utils.dart

@@ -2,17 +2,17 @@ import 'package:intl/intl.dart';
 
 String formatDateTime(DateTime? date) {
   if (date == null) return '-';
-  return DateFormat('yyyy-MM-dd HH:mm:ss').format(date);
+  return DateFormat('yyyy-MM-dd HH:mm:ss').format(date.toLocal());
 }
 
 String formatDate(DateTime? date) {
   if (date == null) return '-';
-  return DateFormat('yyyy-MM-dd').format(date);
+  return DateFormat('yyyy-MM-dd').format(date.toLocal());
 }
 
 String formatTime(DateTime? date) {
   if (date == null) return '-';
-  return DateFormat('HH:mm:ss').format(date);
+  return DateFormat('HH:mm:ss').format(date.toLocal());
 }
 
 String formatRelative(DateTime? date) {

frontend/mining-app/lib/data/datasources/remote/trading_remote_datasource.dart

@@ -6,6 +6,7 @@ import '../../models/asset_display_model.dart';
 import '../../models/kline_model.dart';
 import '../../models/p2p_transfer_model.dart';
 import '../../models/p2p_transfer_fee_config_model.dart';
+import 'package:dio/dio.dart';
 import '../../models/c2c_order_model.dart';
 import '../../../core/network/api_client.dart';
 import '../../../core/network/api_endpoints.dart';
@@ -137,6 +138,9 @@ abstract class TradingRemoteDataSource {
 
   /// 确认收款（卖方操作）
   Future<C2cOrderModel> confirmC2cReceived(String orderNo);
+
+  /// 上传付款水单（买方操作）
+  Future<C2cOrderModel> uploadC2cPaymentProof(String orderNo, String filePath);
 }
 
 class TradingRemoteDataSourceImpl implements TradingRemoteDataSource {
@@ -581,4 +585,20 @@ class TradingRemoteDataSourceImpl implements TradingRemoteDataSource {
       throw ServerException(e.toString());
     }
   }
+
+  @override
+  Future<C2cOrderModel> uploadC2cPaymentProof(String orderNo, String filePath) async {
+    try {
+      final formData = FormData.fromMap({
+        'file': await MultipartFile.fromFile(filePath),
+      });
+      final response = await client.post(
+        ApiEndpoints.c2cUploadProof(orderNo),
+        data: formData,
+      );
+      return C2cOrderModel.fromJson(response.data);
+    } catch (e) {
+      throw ServerException(e.toString());
+    }
+  }
 }

frontend/mining-app/lib/data/models/c2c_order_model.dart

@@ -47,6 +47,8 @@ class C2cOrderModel {
   final int confirmTimeoutMinutes;        // 确认收款超时时间（分钟）
   final DateTime? paymentDeadline;        // 付款截止时间
   final DateTime? confirmDeadline;        // 确认收款截止时间
+  // 付款水单
+  final String? paymentProofUrl;          // 付款水单图片URL
   // Bot 自动购买相关
   final bool botPurchased;                // 是否被 Bot 购买
   final String? sellerKavaAddress;        // 卖家 Kava 地址
@@ -84,6 +86,8 @@ class C2cOrderModel {
     this.confirmTimeoutMinutes = 60,
     this.paymentDeadline,
     this.confirmDeadline,
+    // 付款水单
+    this.paymentProofUrl,
     // Bot 自动购买相关
     this.botPurchased = false,
     this.sellerKavaAddress,
@@ -127,6 +131,8 @@ class C2cOrderModel {
       confirmDeadline: json['confirmDeadline'] != null
           ? DateTime.parse(json['confirmDeadline'])
           : null,
+      // 付款水单
+      paymentProofUrl: json['paymentProofUrl'],
       // Bot 自动购买相关
       botPurchased: json['botPurchased'] ?? false,
       sellerKavaAddress: json['sellerKavaAddress'],

frontend/mining-app/lib/presentation/pages/c2c/c2c_market_page.dart

@@ -602,7 +602,8 @@ class _C2cMarketPageState extends ConsumerState<C2cMarketPage>
   }
 
   String _formatDateTime(DateTime dateTime) {
-    return '${dateTime.month}/${dateTime.day} ${dateTime.hour.toString().padLeft(2, '0')}:${dateTime.minute.toString().padLeft(2, '0')}';
+    final local = dateTime.toLocal();
+    return '${local.month}/${local.day} ${local.hour.toString().padLeft(2, '0')}:${local.minute.toString().padLeft(2, '0')}';
   }
 
   // #13 + #15: 接单对话框（支持部分成交数量输入 + BUY单收款信息输入）

frontend/mining-app/lib/presentation/pages/c2c/c2c_order_detail_page.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:go_router/go_router.dart';
+import 'package:image_picker/image_picker.dart';
 import '../../../core/utils/format_utils.dart';
 import '../../../data/models/c2c_order_model.dart';
 import '../../providers/c2c_providers.dart';
@@ -133,6 +134,13 @@ class _C2cOrderDetailPageState extends ConsumerState<C2cOrderDetailPage> {
           // 交易双方信息
           _buildParticipantsCard(order, isMaker, isTaker),
 
+          // 付款水单
+          if ((order.isMatched || order.isPaid || order.isCompleted) && !order.isBotPurchased)
+            ...[
+              const SizedBox(height: 16),
+              _buildPaymentProofCard(order, isBuyer),
+            ],
+
           const SizedBox(height: 16),
 
           // 操作说明
@@ -756,7 +764,8 @@ class _C2cOrderDetailPageState extends ConsumerState<C2cOrderDetailPage> {
             label: order.isBuy ? '买方 (发布者)' : '卖方 (发布者)',
             name: order.makerNickname?.isNotEmpty == true
                 ? order.makerNickname!
-                : (order.makerPhone?.isNotEmpty == true ? _maskPhone(order.makerPhone!) : '未知用户'),
+                : (order.makerPhone?.isNotEmpty == true ? order.makerPhone! : '未知用户'),
+            phone: order.makerPhone,
             isMe: isMaker,
           ),
           const Divider(height: 24),
@@ -766,7 +775,8 @@ class _C2cOrderDetailPageState extends ConsumerState<C2cOrderDetailPage> {
               label: order.isBuy ? '卖方 (接单者)' : '买方 (接单者)',
               name: order.takerNickname?.isNotEmpty == true
                   ? order.takerNickname!
-                  : (order.takerPhone?.isNotEmpty == true ? _maskPhone(order.takerPhone!) : '未知用户'),
+                  : (order.takerPhone?.isNotEmpty == true ? order.takerPhone! : '未知用户'),
+              phone: order.takerPhone,
               isMe: isTaker,
             )
           else
@@ -774,6 +784,13 @@ class _C2cOrderDetailPageState extends ConsumerState<C2cOrderDetailPage> {
               '等待接单...',
               style: TextStyle(fontSize: 14, color: _grayText),
             ),
+          // 对方收款信息
+          if (order.paymentAccount != null && order.takerAccountSequence != null) ...[
+            const Divider(height: 24),
+            _buildInfoRow('收款账号', order.paymentAccount!, canCopy: true),
+            if (order.paymentRealName != null)
+              _buildInfoRow('收款人', order.paymentRealName!),
+          ],
         ],
       ),
     );
@@ -783,6 +800,7 @@ class _C2cOrderDetailPageState extends ConsumerState<C2cOrderDetailPage> {
     required String label,
     required String name,
     required bool isMe,
+    String? phone,
   }) {
     return Row(
       children: [
@@ -844,6 +862,13 @@ class _C2cOrderDetailPageState extends ConsumerState<C2cOrderDetailPage> {
                   ],
                 ],
               ),
+              if (phone != null && phone.isNotEmpty) ...[
+                const SizedBox(height: 2),
+                Text(
+                  phone,
+                  style: const TextStyle(fontSize: 12, color: _grayText),
+                ),
+              ],
             ],
           ),
         ),
@@ -851,6 +876,169 @@ class _C2cOrderDetailPageState extends ConsumerState<C2cOrderDetailPage> {
     );
   }
 
+  Widget _buildPaymentProofCard(C2cOrderModel order, bool isBuyer) {
+    final hasProof = order.paymentProofUrl != null && order.paymentProofUrl!.isNotEmpty;
+
+    return Container(
+      margin: const EdgeInsets.symmetric(horizontal: 16),
+      padding: const EdgeInsets.all(20),
+      decoration: BoxDecoration(
+        color: Colors.white,
+        borderRadius: BorderRadius.circular(12),
+      ),
+      child: Column(
+        crossAxisAlignment: CrossAxisAlignment.start,
+        children: [
+          Row(
+            children: [
+              const Icon(Icons.receipt_long, size: 20, color: _orange),
+              const SizedBox(width: 8),
+              const Text(
+                '付款水单',
+                style: TextStyle(
+                  fontSize: 16,
+                  fontWeight: FontWeight.bold,
+                  color: _darkText,
+                ),
+              ),
+              const Spacer(),
+              if (isBuyer && (order.isMatched || order.isPaid))
+                GestureDetector(
+                  onTap: () => _handleUploadProof(order),
+                  child: Container(
+                    padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 6),
+                    decoration: BoxDecoration(
+                      color: _orange.withOpacity(0.1),
+                      borderRadius: BorderRadius.circular(6),
+                    ),
+                    child: Row(
+                      mainAxisSize: MainAxisSize.min,
+                      children: const [
+                        Icon(Icons.upload, size: 16, color: _orange),
+                        SizedBox(width: 4),
+                        Text(
+                          '上传水单',
+                          style: TextStyle(fontSize: 12, color: _orange, fontWeight: FontWeight.w500),
+                        ),
+                      ],
+                    ),
+                  ),
+                ),
+            ],
+          ),
+          const SizedBox(height: 16),
+          if (hasProof)
+            GestureDetector(
+              onTap: () => _showProofFullScreen(order.paymentProofUrl!),
+              child: ClipRRect(
+                borderRadius: BorderRadius.circular(8),
+                child: Image.network(
+                  order.paymentProofUrl!,
+                  height: 200,
+                  width: double.infinity,
+                  fit: BoxFit.cover,
+                  errorBuilder: (_, __, ___) => Container(
+                    height: 100,
+                    color: _bgGray,
+                    child: const Center(
+                      child: Text('图片加载失败', style: TextStyle(color: _grayText)),
+                    ),
+                  ),
+                ),
+              ),
+            )
+          else
+            Container(
+              height: 80,
+              width: double.infinity,
+              decoration: BoxDecoration(
+                color: _bgGray,
+                borderRadius: BorderRadius.circular(8),
+                border: Border.all(color: Colors.grey.shade300, style: BorderStyle.solid),
+              ),
+              child: Center(
+                child: Column(
+                  mainAxisAlignment: MainAxisAlignment.center,
+                  children: [
+                    Icon(Icons.image_not_supported_outlined, size: 28, color: Colors.grey.shade400),
+                    const SizedBox(height: 4),
+                    Text(
+                      isBuyer ? '请上传付款凭证' : '买方暂未上传水单',
+                      style: TextStyle(fontSize: 12, color: Colors.grey.shade400),
+                    ),
+                  ],
+                ),
+              ),
+            ),
+        ],
+      ),
+    );
+  }
+
+  Future<void> _handleUploadProof(C2cOrderModel order) async {
+    final picker = ImagePicker();
+    final image = await picker.pickImage(
+      source: ImageSource.gallery,
+      maxWidth: 1920,
+      maxHeight: 1920,
+      imageQuality: 85,
+    );
+    if (image == null) return;
+
+    final notifier = ref.read(c2cTradingNotifierProvider.notifier);
+    final success = await notifier.uploadPaymentProof(order.orderNo, image.path);
+
+    if (success && mounted) {
+      ref.invalidate(c2cOrderDetailProvider(order.orderNo));
+      ScaffoldMessenger.of(context).showSnackBar(
+        const SnackBar(
+          content: Text('付款水单上传成功'),
+          backgroundColor: _green,
+        ),
+      );
+    } else if (mounted) {
+      final error = ref.read(c2cTradingNotifierProvider).error;
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(
+          content: Text('上传失败: ${error ?? '未知错误'}'),
+          backgroundColor: _red,
+        ),
+      );
+    }
+  }
+
+  void _showProofFullScreen(String url) {
+    showDialog(
+      context: context,
+      builder: (context) => Dialog(
+        backgroundColor: Colors.black,
+        insetPadding: const EdgeInsets.all(0),
+        child: Stack(
+          fit: StackFit.expand,
+          children: [
+            InteractiveViewer(
+              child: Image.network(
+                url,
+                fit: BoxFit.contain,
+                errorBuilder: (_, __, ___) => const Center(
+                  child: Text('图片加载失败', style: TextStyle(color: Colors.white)),
+                ),
+              ),
+            ),
+            Positioned(
+              top: 40,
+              right: 16,
+              child: IconButton(
+                icon: const Icon(Icons.close, color: Colors.white, size: 28),
+                onPressed: () => Navigator.pop(context),
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+
   Widget _buildInstructionsCard(
     C2cOrderModel order,
     bool isMaker,
@@ -1108,8 +1296,9 @@ class _C2cOrderDetailPageState extends ConsumerState<C2cOrderDetailPage> {
   }
 
   String _formatDateTime(DateTime dateTime) {
-    return '${dateTime.year}-${dateTime.month.toString().padLeft(2, '0')}-${dateTime.day.toString().padLeft(2, '0')} '
+    final local = dateTime.toLocal();
-        '${dateTime.hour.toString().padLeft(2, '0')}:${dateTime.minute.toString().padLeft(2, '0')}';
+    return '${local.year}-${local.month.toString().padLeft(2, '0')}-${local.day.toString().padLeft(2, '0')} '
+        '${local.hour.toString().padLeft(2, '0')}:${local.minute.toString().padLeft(2, '0')}';
   }
 
   Future<void> _handleCancel(C2cOrderModel order) async {

frontend/mining-app/lib/presentation/pages/c2c/c2c_publish_page.dart

@@ -192,9 +192,11 @@ class _C2cPublishPageState extends ConsumerState<C2cPublishPage> {
   }
 
   Widget _buildBalanceCard(String availableShares, String availableCash) {
-    // C2C交易对象是积分值，BUY和SELL都显示可用积分值
+    final isSell = _selectedType == 1;
-    const label = '可用积分值';
+
-    final balance = availableCash;
+    // 卖单：显示可用积分值（将被冻结）
+    // 买单：不需要显示余额（买方通过外部绿积分支付）
+    if (!isSell) return const SizedBox.shrink();
 
     return Container(
       margin: const EdgeInsets.symmetric(horizontal: 16),
@@ -206,12 +208,12 @@ class _C2cPublishPageState extends ConsumerState<C2cPublishPage> {
       child: Row(
         mainAxisAlignment: MainAxisAlignment.spaceBetween,
         children: [
-          Text(
+          const Text(
-            label,
+            '可用积分值',
-            style: const TextStyle(fontSize: 14, color: _grayText),
+            style: TextStyle(fontSize: 14, color: _grayText),
           ),
           Text(
-            formatAmount(balance),
+            formatAmount(availableCash),
             style: const TextStyle(
               fontSize: 16,
               fontWeight: FontWeight.bold,
@@ -275,8 +277,9 @@ class _C2cPublishPageState extends ConsumerState<C2cPublishPage> {
     String availableCash,
     String currentPrice,
   ) {
-    // C2C交易的是积分值，BUY和SELL上限都是可用积分值
+    final isSell = _selectedType == 1;
-    final maxBalance = availableCash;
+    // 卖单：上限为可用积分值；买单：无上限（买方通过外部绿积分支付）
+    final maxBalance = isSell ? availableCash : null;
 
     return Container(
       margin: const EdgeInsets.symmetric(horizontal: 16),
@@ -323,22 +326,24 @@ class _C2cPublishPageState extends ConsumerState<C2cPublishPage> {
                 borderRadius: BorderRadius.circular(12),
                 borderSide: const BorderSide(color: _orange, width: 2),
               ),
-              suffixIcon: TextButton(
+              suffixIcon: maxBalance != null
-                onPressed: () {
+                  ? TextButton(
-                  _isSyncingInput = true;
+                      onPressed: () {
-                  _quantityController.text = maxBalance;
+                        _isSyncingInput = true;
-                  _amountController.text = maxBalance;
+                        _quantityController.text = maxBalance;
-                  _isSyncingInput = false;
+                        _amountController.text = maxBalance;
-                  setState(() {});
+                        _isSyncingInput = false;
-                },
+                        setState(() {});
-                child: const Text(
+                      },
-                  '全部',
+                      child: const Text(
-                  style: TextStyle(
+                        '全部',
-                    color: _orange,
+                        style: TextStyle(
-                    fontWeight: FontWeight.w500,
+                          color: _orange,
-                  ),
+                          fontWeight: FontWeight.w500,
-                ),
+                        ),
-              ),
+                      ),
+                    )
+                  : null,
               suffixText: '积分值',
               suffixStyle: const TextStyle(color: _grayText, fontSize: 14),
             ),

frontend/mining-app/lib/presentation/providers/c2c_providers.dart

@@ -178,6 +178,19 @@ class C2cTradingNotifier extends StateNotifier<C2cTradingState> {
     }
   }
 
+  /// 上传付款水单（买方操作）
+  Future<bool> uploadPaymentProof(String orderNo, String filePath) async {
+    state = state.copyWith(isLoading: true, clearError: true);
+    try {
+      final order = await _dataSource.uploadC2cPaymentProof(orderNo, filePath);
+      state = state.copyWith(isLoading: false, lastOrder: order);
+      return true;
+    } catch (e) {
+      state = state.copyWith(isLoading: false, error: e.toString());
+      return false;
+    }
+  }
+
   void clearError() {
     state = state.copyWith(clearError: true);
   }