更新数据库配置为niumall，添加用户登出功能并集成axios

backend/init_database.js

@@ -0,0 +1,135 @@
+const { sequelize } = require('./models');
+const { ApiUser, Order } = require('./models');
+const bcrypt = require('bcryptjs');
+
+// 演示账号数据
+const demoUsers = [
+  {
+    username: 'admin',
+    password: 'admin123',
+    phone: '13800138001',
+    email: 'admin@niumall.com',
+    user_type: 'admin',
+    status: 'active'
+  },
+  {
+    username: 'buyer',
+    password: 'buyer123',
+    phone: '13800138002',
+    email: 'buyer@niumall.com',
+    user_type: 'client',
+    status: 'active'
+  },
+  {
+    username: 'trader',
+    password: 'trader123',
+    phone: '13800138003',
+    email: 'trader@niumall.com',
+    user_type: 'supplier',
+    status: 'active'
+  }
+];
+
+// 演示订单数据
+const demoOrders = [
+  {
+    orderNo: 'ORD20240520001',
+    buyerId: 2, // buyer用户
+    buyerName: '采购商',
+    supplierId: 3, // trader用户
+    supplierName: '供应商',
+    traderId: null,
+    traderName: null,
+    cattleBreed: '西门塔尔牛',
+    cattleCount: 10,
+    expectedWeight: 5000.00,
+    actualWeight: null,
+    unitPrice: 35.00,
+    totalAmount: 175000.00,
+    paidAmount: 50000.00,
+    remainingAmount: 125000.00,
+    status: 'pending',
+    deliveryAddress: '北京市朝阳区某某路123号',
+    expectedDeliveryDate: new Date('2024-06-01'),
+    actualDeliveryDate: null,
+    notes: '请按时交货，质量要保证'
+  },
+  {
+    orderNo: 'ORD20240520002',
+    buyerId: 2, // buyer用户
+    buyerName: '采购商',
+    supplierId: 3, // trader用户
+    supplierName: '供应商',
+    traderId: null,
+    traderName: null,
+    cattleBreed: '夏洛来牛',
+    cattleCount: 5,
+    expectedWeight: 2500.00,
+    actualWeight: null,
+    unitPrice: 38.00,
+    totalAmount: 95000.00,
+    paidAmount: 95000.00,
+    remainingAmount: 0.00,
+    status: 'confirmed',
+    deliveryAddress: '北京市海淀区某某路456号',
+    expectedDeliveryDate: new Date('2024-05-28'),
+    actualDeliveryDate: null,
+    notes: '加急订单'
+  }
+];
+
+// 初始化数据库
+const initDatabase = async () => {
+  try {
+    console.log('开始初始化数据库...');
+    
+    // 测试数据库连接
+    await sequelize.authenticate();
+    console.log('✅ 数据库连接成功');
+
+    // 删除并重新创建表结构
+    console.log('正在创建表结构...');
+    await sequelize.sync({ force: true });
+    console.log('✅ 表结构创建完成');
+
+    // 添加演示用户
+    console.log('正在添加演示用户...');
+    for (const userData of demoUsers) {
+      // 加密密码
+      const salt = await bcrypt.genSalt(10);
+      const passwordHash = await bcrypt.hash(userData.password, salt);
+      
+      try {
+        await ApiUser.create({
+          ...userData,
+          password_hash: passwordHash
+        });
+        console.log(`✅ 成功创建用户: ${userData.username} (${userData.user_type})`);
+      } catch (error) {
+        console.error(`❌ 创建用户 ${userData.username} 时出错:`, error.message);
+      }
+    }
+
+    // 添加演示订单
+    console.log('正在添加演示订单...');
+    for (const orderData of demoOrders) {
+      try {
+        await Order.create(orderData);
+        console.log(`✅ 成功创建订单: ${orderData.orderNo}`);
+      } catch (error) {
+        console.error(`❌ 创建订单 ${orderData.orderNo} 时出错:`, error.message);
+      }
+    }
+
+    console.log('✅ 数据库初始化完成');
+  } catch (error) {
+    console.error('❌ 数据库初始化失败:', error.message);
+    console.error(error);
+  } finally {
+    // 关闭数据库连接
+    await sequelize.close();
+  }
+};
+
+// 执行初始化
+initDatabase();