diff --git a/db.js b/db.js
index 7a2f64f..7b3cfff 100644
--- a/db.js
+++ b/db.js
@@ -33,19 +33,125 @@ async function initDB() {
   )
   await conn.end()
 
-  // 2.2 建表
+  // 2.2 建表（如果不存在）
   await pool.query(`
     CREATE TABLE IF NOT EXISTS users (
-      id          INT PRIMARY KEY AUTO_INCREMENT,
-      username    VARCHAR(50)  UNIQUE NOT NULL,
-      password    VARCHAR(255) NOT NULL,
-      nickname    VARCHAR(50)  DEFAULT '',
-      avatar      VARCHAR(255) DEFAULT '',
-      role        VARCHAR(20)  DEFAULT 'user',
-      created_at  DATETIME     DEFAULT CURRENT_TIMESTAMP
-    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4
+      id            INT             NOT NULL AUTO_INCREMENT  COMMENT '用户ID (主键)',
+      username      VARCHAR(50)     NOT NULL                 COMMENT '用户名 (登录账号)',
+      password      VARCHAR(255)    NOT NULL                 COMMENT '登录密码 (应存储加密后的值)',
+      real_name     VARCHAR(50)     DEFAULT NULL             COMMENT '真实姓名',
+      role          VARCHAR(20)     NOT NULL DEFAULT 'user'  COMMENT '角色: admin-管理员, user-普通用户',
+      status        TINYINT(1)      NOT NULL DEFAULT 1       COMMENT '账号状态: 0-禁用, 1-启用',
+      created_at    DATETIME        NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
+      updated_at    DATETIME        NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
+      PRIMARY KEY (id),
+      UNIQUE KEY uk_username (username)
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='系统用户表'
   `)
 
+  await pool.query(`
+    CREATE TABLE IF NOT EXISTS customers (
+      id          INT             NOT NULL AUTO_INCREMENT  COMMENT '加盟商ID (主键)',
+      name        VARCHAR(100)    NOT NULL                 COMMENT '加盟商姓名',
+      phone       VARCHAR(20)     DEFAULT NULL             COMMENT '联系电话',
+      province    VARCHAR(50)     DEFAULT NULL             COMMENT '省',
+      city        VARCHAR(50)     DEFAULT NULL             COMMENT '市',
+      district    VARCHAR(50)     DEFAULT NULL             COMMENT '区',
+      address     VARCHAR(200)    DEFAULT NULL             COMMENT '详细地址',
+      customer_type VARCHAR(20)   DEFAULT 'Normal'         COMMENT '客户类型: VIP-地区总代理, Normal-普通代理',
+      email       VARCHAR(100)    DEFAULT NULL             COMMENT '电子邮箱',
+      remark      TEXT            DEFAULT NULL             COMMENT '备注信息',
+      created_at  DATETIME        NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
+      updated_at  DATETIME        NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
+      PRIMARY KEY (id),
+      KEY idx_customers_name (name),
+      KEY idx_customers_phone (phone)
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='加盟商信息表'
+  `)
+  // 确保 customer_type 列存在（兼容旧表）
+  try { await pool.query(`ALTER TABLE customers ADD COLUMN customer_type VARCHAR(20) DEFAULT 'Normal' COMMENT '客户类型: VIP-地区总代理, Normal-普通代理' AFTER address`) } catch {}
+  await pool.query(`
+    CREATE TABLE IF NOT EXISTS employees (
+      id          INT             NOT NULL AUTO_INCREMENT  COMMENT '员工ID (主键)',
+      name        VARCHAR(100)    NOT NULL                 COMMENT '员工姓名',
+      gender      VARCHAR(4)      DEFAULT NULL             COMMENT '性别: 男/女',
+      age         INT             DEFAULT NULL             COMMENT '年龄',
+      education   VARCHAR(50)     DEFAULT NULL             COMMENT '学历: 高中/专科/本科/硕士/博士',
+      department  VARCHAR(100)    DEFAULT NULL             COMMENT '所属部门',
+      entry_date  DATE            DEFAULT NULL             COMMENT '入职时间',
+      position    VARCHAR(100)    DEFAULT NULL             COMMENT '职务/岗位',
+      salary      DECIMAL(10,2)   DEFAULT NULL             COMMENT '工资金额',
+      phone       VARCHAR(20)     DEFAULT NULL             COMMENT '联系电话',
+      email       VARCHAR(100)    DEFAULT NULL             COMMENT '电子邮箱',
+      status      TINYINT(1)      NOT NULL DEFAULT 1       COMMENT '在职状态: 0-离职, 1-在职',
+      remark      TEXT            DEFAULT NULL             COMMENT '备注',
+      created_at  DATETIME        NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
+      updated_at  DATETIME        NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
+      PRIMARY KEY (id),
+      KEY idx_employees_name (name),
+      KEY idx_employees_department (department)
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='员工信息表'
+  `)
+  await pool.query(`
+    CREATE TABLE IF NOT EXISTS products (
+      id          INT             NOT NULL AUTO_INCREMENT  COMMENT '产品ID (主键)',
+      name        VARCHAR(200)    NOT NULL                 COMMENT '产品名称',
+      type        VARCHAR(100)    DEFAULT NULL             COMMENT '产品类型/分类',
+      quantity    INT             NOT NULL DEFAULT 0       COMMENT '产品库存数量',
+      price       DECIMAL(10,2)   NOT NULL DEFAULT 0.00    COMMENT '产品单价',
+      unit        VARCHAR(20)     DEFAULT '件'              COMMENT '计量单位',
+      specification VARCHAR(200)  DEFAULT NULL             COMMENT '产品规格/型号',
+      supplier    VARCHAR(200)    DEFAULT NULL             COMMENT '供应商',
+      remark      TEXT            DEFAULT NULL             COMMENT '备注',
+      created_at  DATETIME        NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
+      updated_at  DATETIME        NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
+      PRIMARY KEY (id),
+      KEY idx_products_name (name),
+      KEY idx_products_type (type)
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='产品信息表'
+  `)
+  // contracts 依赖 customers 和 employees，after_sales 同样依赖
+  await pool.query(`
+    CREATE TABLE IF NOT EXISTS contracts (
+      id              INT             NOT NULL AUTO_INCREMENT  COMMENT '合同ID (主键)',
+      customer_id     INT             NOT NULL                 COMMENT '客户ID (关联客户表)',
+      contract_name   VARCHAR(200)    NOT NULL                 COMMENT '合同名称',
+      contract_no     VARCHAR(100)    DEFAULT NULL             COMMENT '合同编号',
+      contract_content TEXT           DEFAULT NULL             COMMENT '合同内容/条款',
+      amount          DECIMAL(12,2)   DEFAULT NULL             COMMENT '合同金额',
+      effective_date  DATE            DEFAULT NULL             COMMENT '合同生效日期',
+      expiry_date     DATE            DEFAULT NULL             COMMENT '合同有效期 (截止日期)',
+      employee_id     INT             DEFAULT NULL             COMMENT '业务员ID (关联员工表)',
+      status          VARCHAR(20)     NOT NULL DEFAULT '生效'   COMMENT '合同状态: 草稿/生效/完成/作废',
+      remark          TEXT            DEFAULT NULL             COMMENT '备注',
+      created_at      DATETIME        NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
+      updated_at      DATETIME        NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
+      PRIMARY KEY (id),
+      KEY idx_contracts_customer_id (customer_id),
+      KEY idx_contracts_employee_id (employee_id),
+      KEY idx_contracts_effective_date (effective_date)
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='合同信息表'
+  `)
+  await pool.query(`
+    CREATE TABLE IF NOT EXISTS after_sales (
+      id              INT             NOT NULL AUTO_INCREMENT  COMMENT '售后记录ID (主键)',
+      customer_id     INT             NOT NULL                 COMMENT '客户ID (关联客户表)',
+      feedback        TEXT            NOT NULL                 COMMENT '客户反馈意见/售后内容',
+      employee_id     INT             DEFAULT NULL             COMMENT '处理业务员ID (关联员工表)',
+      handle_method   TEXT            DEFAULT NULL             COMMENT '处理方式/解决方案',
+      handle_status   VARCHAR(20)     NOT NULL DEFAULT '待处理'  COMMENT '处理状态: 待处理/处理中/已完成',
+      service_date    DATE            DEFAULT NULL             COMMENT '售后日期',
+      remark          TEXT            DEFAULT NULL             COMMENT '备注',
+      created_at      DATETIME        NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
+      updated_at      DATETIME        NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
+      PRIMARY KEY (id),
+      KEY idx_after_sales_customer_id (customer_id),
+      KEY idx_after_sales_employee_id (employee_id),
+      KEY idx_after_sales_status (handle_status)
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='售后信息表'
+  `)
+  console.log('[init] 数据表初始化完成')
+
   // 2.3 插 admin（仅当不存在时）
   const [rows] = await pool.query(
     'SELECT id FROM users WHERE username = ?',
@@ -54,7 +160,7 @@ async function initDB() {
   if (rows.length === 0) {
     const hash = await bcrypt.hash('123456', 10)
     await pool.query(
-      'INSERT INTO users (username, password, nickname, role) VALUES (?, ?, ?, ?)',
+      'INSERT INTO users (username, password, real_name, role) VALUES (?, ?, ?, ?)',
       ['admin', hash, '超级管理员', 'admin']
     )
     console.log('[init] 已创建默认账号 admin / 123456')
diff --git a/routes/afterSales.js b/routes/afterSales.js
new file mode 100644
index 0000000..7998bca
--- /dev/null
+++ b/routes/afterSales.js
@@ -0,0 +1,200 @@
+// routes/afterSales.js —— 售后管理 CRUD
+const { pool } = require('../db')
+
+function pagination(query) {
+  const page = Math.max(Number(query.page) || 1, 1)
+  const pageSize = Math.min(Math.max(Number(query.pageSize) || 10, 1), 100)
+  const offset = (page - 1) * pageSize
+  return { page, pageSize, offset }
+}
+
+const LIST_SELECT = `
+  SELECT
+    a.*,
+    cu.name AS customer_name,
+    e.name  AS employee_name
+  FROM after_sales a
+    LEFT JOIN customers cu ON a.customer_id = cu.id
+    LEFT JOIN employees e  ON a.employee_id = e.id
+`
+
+// GET /api/after-sales —— 列表
+async function list(req, res) {
+  try {
+    const { page, pageSize, offset } = pagination(req.query)
+    const { handle_status, customer_name } = req.query
+
+    let where = 'WHERE 1=1'
+    const params = []
+
+    if (handle_status) {
+      where += ' AND a.handle_status = ?'
+      params.push(handle_status)
+    }
+    if (customer_name) {
+      where += ' AND cu.name LIKE ?'
+      params.push(`%${customer_name}%`)
+    }
+
+    const [[{ total }]] = await pool.query(
+      `SELECT COUNT(*) AS total FROM after_sales a
+         LEFT JOIN customers cu ON a.customer_id = cu.id
+         LEFT JOIN employees e  ON a.employee_id = e.id
+       ${where}`,
+      params
+    )
+
+    const [rows] = await pool.query(
+      `${LIST_SELECT} ${where} ORDER BY a.id DESC LIMIT ? OFFSET ?`,
+      [...params, pageSize, offset]
+    )
+
+    res.json({
+      code: 0,
+      message: 'ok',
+      data: {
+        list: rows,
+        total,
+        page,
+        pageSize,
+        totalPages: Math.ceil(total / pageSize),
+      },
+    })
+  } catch (e) {
+    console.error('[after-sales list] error:', e)
+    res.status(500).json({ code: 500, message: e.message })
+  }
+}
+
+// GET /api/after-sales/:id —— 详情
+async function detail(req, res) {
+  try {
+    const [rows] = await pool.query(
+      `${LIST_SELECT} WHERE a.id = ?`,
+      [req.params.id]
+    )
+    if (rows.length === 0) {
+      return res.status(404).json({ code: 404, message: '售后记录不存在' })
+    }
+    res.json({ code: 0, message: 'ok', data: rows[0] })
+  } catch (e) {
+    console.error('[after-sales detail] error:', e)
+    res.status(500).json({ code: 500, message: e.message })
+  }
+}
+
+// POST /api/after-sales —— 新增
+async function create(req, res) {
+  const {
+    customer_id, feedback, employee_id, handle_method,
+    handle_status, service_date, remark,
+  } = req.body || {}
+
+  if (!customer_id) {
+    return res.status(400).json({ code: 400, message: '客户ID必填' })
+  }
+  if (!feedback) {
+    return res.status(400).json({ code: 400, message: '售后反馈内容必填' })
+  }
+
+  try {
+    // 校验客户存在
+    const [cust] = await pool.query('SELECT id FROM customers WHERE id = ?', [customer_id])
+    if (cust.length === 0) {
+      return res.status(400).json({ code: 400, message: '关联客户不存在' })
+    }
+    // 校验业务员
+    if (employee_id) {
+      const [emp] = await pool.query('SELECT id FROM employees WHERE id = ?', [employee_id])
+      if (emp.length === 0) {
+        return res.status(400).json({ code: 400, message: '关联业务员不存在' })
+      }
+    }
+
+    const [result] = await pool.query(
+      `INSERT INTO after_sales
+         (customer_id, feedback, employee_id, handle_method, handle_status, service_date, remark)
+       VALUES (?, ?, ?, ?, ?, ?, ?)`,
+      [customer_id, feedback,
+        employee_id || null,
+        handle_method || null,
+        handle_status || '待处理',
+        service_date || null,
+        remark || null]
+    )
+
+    const [rows] = await pool.query(`${LIST_SELECT} WHERE a.id = ?`, [result.insertId])
+    res.json({ code: 0, message: 'ok', data: rows[0] })
+  } catch (e) {
+    console.error('[after-sales create] error:', e)
+    res.status(500).json({ code: 500, message: e.message })
+  }
+}
+
+// PUT /api/after-sales/:id —— 更新
+async function update(req, res) {
+  const { id } = req.params
+  const fields = [
+    'customer_id', 'feedback', 'employee_id', 'handle_method',
+    'handle_status', 'service_date', 'remark',
+  ]
+
+  try {
+    const [existing] = await pool.query('SELECT id FROM after_sales WHERE id = ?', [id])
+    if (existing.length === 0) {
+      return res.status(404).json({ code: 404, message: '售后记录不存在' })
+    }
+
+    if (req.body.customer_id) {
+      const [cust] = await pool.query('SELECT id FROM customers WHERE id = ?', [req.body.customer_id])
+      if (cust.length === 0) {
+        return res.status(400).json({ code: 400, message: '关联客户不存在' })
+      }
+    }
+    if (req.body.employee_id) {
+      const [emp] = await pool.query('SELECT id FROM employees WHERE id = ?', [req.body.employee_id])
+      if (emp.length === 0) {
+        return res.status(400).json({ code: 400, message: '关联业务员不存在' })
+      }
+    }
+
+    const sets = []
+    const params = []
+    for (const f of fields) {
+      if (req.body[f] !== undefined) {
+        sets.push(`${f} = ?`)
+        params.push(req.body[f])
+      }
+    }
+    if (sets.length === 0) {
+      return res.status(400).json({ code: 400, message: '没有需要更新的字段' })
+    }
+
+    params.push(id)
+    await pool.query(`UPDATE after_sales SET ${sets.join(', ')} WHERE id = ?`, params)
+
+    const [rows] = await pool.query(`${LIST_SELECT} WHERE a.id = ?`, [id])
+    res.json({ code: 0, message: 'ok', data: rows[0] })
+  } catch (e) {
+    console.error('[after-sales update] error:', e)
+    res.status(500).json({ code: 500, message: e.message })
+  }
+}
+
+// DELETE /api/after-sales/:id —— 删除
+async function remove(req, res) {
+  const { id } = req.params
+  try {
+    const [existing] = await pool.query('SELECT id FROM after_sales WHERE id = ?', [id])
+    if (existing.length === 0) {
+      return res.status(404).json({ code: 404, message: '售后记录不存在' })
+    }
+    await pool.query('DELETE FROM after_sales WHERE id = ?', [id])
+    res.json({ code: 0, message: 'ok' })
+  } catch (e) {
+    console.error('[after-sales delete] error:', e)
+    res.status(500).json({ code: 500, message: e.message })
+  }
+}
+
+module.exports = { list, detail, create, update, remove }
diff --git a/routes/contracts.js b/routes/contracts.js
new file mode 100644
index 0000000..f5cce59
--- /dev/null
+++ b/routes/contracts.js
@@ -0,0 +1,220 @@
+// routes/contracts.js —— 合同管理 CRUD
+const { pool } = require('../db')
+
+function pagination(query) {
+  const page = Math.max(Number(query.page) || 1, 1)
+  const pageSize = Math.min(Math.max(Number(query.pageSize) || 10, 1), 100)
+  const offset = (page - 1) * pageSize
+  return { page, pageSize, offset }
+}
+
+// 列表查询时 JOIN 客户名和员工名
+const LIST_SELECT = `
+  SELECT
+    c.*,
+    cu.name AS customer_name,
+    e.name  AS employee_name
+  FROM contracts c
+    LEFT JOIN customers cu ON c.customer_id = cu.id
+    LEFT JOIN employees e  ON c.employee_id = e.id
+`
+
+// 单条查询时用同样的 JOIN
+const DETAIL_SELECT = LIST_SELECT
+
+// GET /api/contracts —— 列表
+async function list(req, res) {
+  try {
+    const { page, pageSize, offset } = pagination(req.query)
+    const { status, customer_name, contract_no, employee_name } = req.query
+
+    let where = 'WHERE 1=1'
+    const params = []
+
+    if (status) {
+      where += ' AND c.status = ?'
+      params.push(status)
+    }
+    if (customer_name) {
+      where += ' AND cu.name LIKE ?'
+      params.push(`%${customer_name}%`)
+    }
+    if (contract_no) {
+      where += ' AND c.contract_no LIKE ?'
+      params.push(`%${contract_no}%`)
+    }
+    if (employee_name) {
+      where += ' AND e.name LIKE ?'
+      params.push(`%${employee_name}%`)
+    }
+
+    const [[{ total }]] = await pool.query(
+      `SELECT COUNT(*) AS total FROM contracts c
+         LEFT JOIN customers cu ON c.customer_id = cu.id
+         LEFT JOIN employees e  ON c.employee_id = e.id
+       ${where}`,
+      params
+    )
+
+    const [rows] = await pool.query(
+      `${LIST_SELECT} ${where} ORDER BY c.id DESC LIMIT ? OFFSET ?`,
+      [...params, pageSize, offset]
+    )
+
+    res.json({
+      code: 0,
+      message: 'ok',
+      data: {
+        list: rows,
+        total,
+        page,
+        pageSize,
+        totalPages: Math.ceil(total / pageSize),
+      },
+    })
+  } catch (e) {
+    console.error('[contracts list] error:', e)
+    res.status(500).json({ code: 500, message: e.message })
+  }
+}
+
+// GET /api/contracts/:id —— 详情
+async function detail(req, res) {
+  try {
+    const [rows] = await pool.query(
+      `${DETAIL_SELECT} WHERE c.id = ?`,
+      [req.params.id]
+    )
+    if (rows.length === 0) {
+      return res.status(404).json({ code: 404, message: '合同不存在' })
+    }
+    res.json({ code: 0, message: 'ok', data: rows[0] })
+  } catch (e) {
+    console.error('[contracts detail] error:', e)
+    res.status(500).json({ code: 500, message: e.message })
+  }
+}
+
+// POST /api/contracts —— 新增
+async function create(req, res) {
+  const {
+    customer_id, contract_name, contract_no, contract_content,
+    amount, effective_date, expiry_date, employee_id, status, remark,
+  } = req.body || {}
+
+  if (!customer_id) {
+    return res.status(400).json({ code: 400, message: '客户ID必填' })
+  }
+  if (!contract_name) {
+    return res.status(400).json({ code: 400, message: '合同名称必填' })
+  }
+
+  try {
+    // 校验客户是否存在
+    const [cust] = await pool.query('SELECT id FROM customers WHERE id = ?', [customer_id])
+    if (cust.length === 0) {
+      return res.status(400).json({ code: 400, message: '关联客户不存在' })
+    }
+    // 校验业务员（如果填了）
+    if (employee_id) {
+      const [emp] = await pool.query('SELECT id FROM employees WHERE id = ?', [employee_id])
+      if (emp.length === 0) {
+        return res.status(400).json({ code: 400, message: '关联业务员不存在' })
+      }
+    }
+
+    const [result] = await pool.query(
+      `INSERT INTO contracts
+         (customer_id, contract_name, contract_no, contract_content, amount, effective_date, expiry_date, employee_id, status, remark)
+       VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`,
+      [customer_id, contract_name,
+        contract_no || null,
+        contract_content || null,
+        amount !== undefined ? amount : null,
+        effective_date || null,
+        expiry_date || null,
+        employee_id || null,
+        status || '生效',
+        remark || null]
+    )
+
+    const [rows] = await pool.query(`${DETAIL_SELECT} WHERE c.id = ?`, [result.insertId])
+    res.json({ code: 0, message: 'ok', data: rows[0] })
+  } catch (e) {
+    console.error('[contracts create] error:', e)
+    res.status(500).json({ code: 500, message: e.message })
+  }
+}
+
+// PUT /api/contracts/:id —— 更新
+async function update(req, res) {
+  const { id } = req.params
+  const fields = [
+    'customer_id', 'contract_name', 'contract_no', 'contract_content',
+    'amount', 'effective_date', 'expiry_date', 'employee_id', 'status', 'remark',
+  ]
+
+  try {
+    const [existing] = await pool.query('SELECT id FROM contracts WHERE id = ?', [id])
+    if (existing.length === 0) {
+      return res.status(404).json({ code: 404, message: '合同不存在' })
+    }
+
+    // 如果更新了 customer_id 或 employee_id，需要校验
+    if (req.body.customer_id) {
+      const [cust] = await pool.query('SELECT id FROM customers WHERE id = ?', [req.body.customer_id])
+      if (cust.length === 0) {
+        return res.status(400).json({ code: 400, message: '关联客户不存在' })
+      }
+    }
+    if (req.body.employee_id) {
+      const [emp] = await pool.query('SELECT id FROM employees WHERE id = ?', [req.body.employee_id])
+      if (emp.length === 0) {
+        return res.status(400).json({ code: 400, message: '关联业务员不存在' })
+      }
+    }
+
+    const sets = []
+    const params = []
+    for (const f of fields) {
+      if (req.body[f] !== undefined) {
+        sets.push(`${f} = ?`)
+        params.push(req.body[f])
+      }
+    }
+    if (sets.length === 0) {
+      return res.status(400).json({ code: 400, message: '没有需要更新的字段' })
+    }
+
+    params.push(id)
+    await pool.query(`UPDATE contracts SET ${sets.join(', ')} WHERE id = ?`, params)
+
+    const [rows] = await pool.query(`${DETAIL_SELECT} WHERE c.id = ?`, [id])
+    res.json({ code: 0, message: 'ok', data: rows[0] })
+  } catch (e) {
+    console.error('[contracts update] error:', e)
+    res.status(500).json({ code: 500, message: e.message })
+  }
+}
+
+// DELETE /api/contracts/:id —— 删除
+async function remove(req, res) {
+  const { id } = req.params
+  try {
+    const [existing] = await pool.query('SELECT id FROM contracts WHERE id = ?', [id])
+    if (existing.length === 0) {
+      return res.status(404).json({ code: 404, message: '合同不存在' })
+    }
+    await pool.query('DELETE FROM contracts WHERE id = ?', [id])
+    res.json({ code: 0, message: 'ok' })
+  } catch (e) {
+    console.error('[contracts delete] error:', e)
+    // 如果因为外键约束（customer_id 被 after_sales 引用）导致删除失败
+    if (e.code === 'ER_ROW_IS_REFERENCED_2') {
+      return res.status(400).json({ code: 400, message: '该合同关联了售后记录，无法删除' })
+    }
+    res.status(500).json({ code: 500, message: e.message })
+  }
+}
+
+module.exports = { list, detail, create, update, remove }
diff --git a/routes/customers.js b/routes/customers.js
new file mode 100644
index 0000000..4a6a9fa
--- /dev/null
+++ b/routes/customers.js
@@ -0,0 +1,166 @@
+// routes/customers.js —— 客户管理 CRUD
+const { pool } = require('../db')
+
+// 提取分页参数
+function pagination(query) {
+  const page = Math.max(Number(query.page) || 1, 1)
+  const pageSize = Math.min(Math.max(Number(query.pageSize) || 10, 1), 100)
+  const offset = (page - 1) * pageSize
+  return { page, pageSize, offset }
+}
+
+// GET /api/customers —— 列表（支持搜索、分页）
+async function list(req, res) {
+  try {
+    const { page, pageSize, offset } = pagination(req.query)
+    const { name, phone, province, city, customer_type } = req.query
+
+    let where = 'WHERE 1=1'
+    const params = []
+
+    if (name) {
+      where += ' AND name LIKE ?'
+      params.push(`%${name}%`)
+    }
+    if (phone) {
+      where += ' AND phone LIKE ?'
+      params.push(`%${phone}%`)
+    }
+    if (province) {
+      where += ' AND province = ?'
+      params.push(province)
+    }
+    if (city) {
+      where += ' AND city = ?'
+      params.push(city)
+    }
+    if (customer_type) {
+      where += ' AND customer_type = ?'
+      params.push(customer_type)
+    }
+
+    // 查总数
+    const [[{ total }]] = await pool.query(
+      `SELECT COUNT(*) AS total FROM customers ${where}`,
+      params
+    )
+
+    // 查分页数据
+    const [rows] = await pool.query(
+      `SELECT * FROM customers ${where} ORDER BY id DESC LIMIT ? OFFSET ?`,
+      [...params, pageSize, offset]
+    )
+
+    res.json({
+      code: 0,
+      message: 'ok',
+      data: {
+        list: rows,
+        total,
+        page,
+        pageSize,
+        totalPages: Math.ceil(total / pageSize),
+      },
+    })
+  } catch (e) {
+    console.error('[customers list] error:', e)
+    res.status(500).json({ code: 500, message: e.message })
+  }
+}
+
+// GET /api/customers/:id —— 详情
+async function detail(req, res) {
+  try {
+    const [rows] = await pool.query('SELECT * FROM customers WHERE id = ?', [req.params.id])
+    if (rows.length === 0) {
+      return res.status(404).json({ code: 404, message: '客户不存在' })
+    }
+    res.json({ code: 0, message: 'ok', data: rows[0] })
+  } catch (e) {
+    console.error('[customers detail] error:', e)
+    res.status(500).json({ code: 500, message: e.message })
+  }
+}
+
+// POST /api/customers —— 新增
+async function create(req, res) {
+  const {
+    name, phone, province, city, district,
+    address, customer_type, email, remark,
+  } = req.body || {}
+
+  if (!name) {
+    return res.status(400).json({ code: 400, message: '客户姓名必填' })
+  }
+
+  try {
+    const [result] = await pool.query(
+      `INSERT INTO customers (name, phone, province, city, district, address, customer_type, email, remark)
+       VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)`,
+      [name, phone || null, province || null, city || null, district || null,
+        address || null, customer_type || 'Normal', email || null, remark || null]
+    )
+    const [rows] = await pool.query('SELECT * FROM customers WHERE id = ?', [result.insertId])
+    res.json({ code: 0, message: 'ok', data: rows[0] })
+  } catch (e) {
+    console.error('[customers create] error:', e)
+    res.status(500).json({ code: 500, message: e.message })
+  }
+}
+
+// PUT /api/customers/:id —— 更新
+async function update(req, res) {
+  const { id } = req.params
+  const fields = [
+    'name', 'phone', 'province', 'city', 'district',
+    'address', 'customer_type', 'email', 'remark',
+  ]
+
+  try {
+    // 先确认记录存在
+    const [existing] = await pool.query('SELECT id FROM customers WHERE id = ?', [id])
+    if (existing.length === 0) {
+      return res.status(404).json({ code: 404, message: '客户不存在' })
+    }
+
+    // 动态构建 SET 子句（只更新传入的字段）
+    const sets = []
+    const params = []
+    for (const f of fields) {
+      if (req.body[f] !== undefined) {
+        sets.push(`${f} = ?`)
+        params.push(req.body[f])
+      }
+    }
+    if (sets.length === 0) {
+      return res.status(400).json({ code: 400, message: '没有需要更新的字段' })
+    }
+
+    params.push(id)
+    await pool.query(`UPDATE customers SET ${sets.join(', ')} WHERE id = ?`, params)
+
+    const [rows] = await pool.query('SELECT * FROM customers WHERE id = ?', [id])
+    res.json({ code: 0, message: 'ok', data: rows[0] })
+  } catch (e) {
+    console.error('[customers update] error:', e)
+    res.status(500).json({ code: 500, message: e.message })
+  }
+}
+
+// DELETE /api/customers/:id —— 删除
+async function remove(req, res) {
+  const { id } = req.params
+  try {
+    const [existing] = await pool.query('SELECT id FROM customers WHERE id = ?', [id])
+    if (existing.length === 0) {
+      return res.status(404).json({ code: 404, message: '客户不存在' })
+    }
+    await pool.query('DELETE FROM customers WHERE id = ?', [id])
+    res.json({ code: 0, message: 'ok' })
+  } catch (e) {
+    console.error('[customers delete] error:', e)
+    res.status(500).json({ code: 500, message: e.message })
+  }
+}
+
+module.exports = { list, detail, create, update, remove }
diff --git a/routes/employees.js b/routes/employees.js
new file mode 100644
index 0000000..1a8c204
--- /dev/null
+++ b/routes/employees.js
@@ -0,0 +1,163 @@
+// routes/employees.js —— 员工管理 CRUD
+const { pool } = require('../db')
+
+function pagination(query) {
+  const page = Math.max(Number(query.page) || 1, 1)
+  const pageSize = Math.min(Math.max(Number(query.pageSize) || 10, 1), 100)
+  const offset = (page - 1) * pageSize
+  return { page, pageSize, offset }
+}
+
+// GET /api/employees —— 列表
+async function list(req, res) {
+  try {
+    const { page, pageSize, offset } = pagination(req.query)
+    const { name, department, status } = req.query
+
+    let where = 'WHERE 1=1'
+    const params = []
+
+    if (name) {
+      where += ' AND name LIKE ?'
+      params.push(`%${name}%`)
+    }
+    if (department) {
+      where += ' AND department LIKE ?'
+      params.push(`%${department}%`)
+    }
+    if (status !== undefined && status !== '') {
+      where += ' AND status = ?'
+      params.push(Number(status))
+    }
+
+    const [[{ total }]] = await pool.query(
+      `SELECT COUNT(*) AS total FROM employees ${where}`,
+      params
+    )
+
+    const [rows] = await pool.query(
+      `SELECT * FROM employees ${where} ORDER BY id DESC LIMIT ? OFFSET ?`,
+      [...params, pageSize, offset]
+    )
+
+    res.json({
+      code: 0,
+      message: 'ok',
+      data: {
+        list: rows,
+        total,
+        page,
+        pageSize,
+        totalPages: Math.ceil(total / pageSize),
+      },
+    })
+  } catch (e) {
+    console.error('[employees list] error:', e)
+    res.status(500).json({ code: 500, message: e.message })
+  }
+}
+
+// GET /api/employees/:id —— 详情
+async function detail(req, res) {
+  try {
+    const [rows] = await pool.query('SELECT * FROM employees WHERE id = ?', [req.params.id])
+    if (rows.length === 0) {
+      return res.status(404).json({ code: 404, message: '员工不存在' })
+    }
+    res.json({ code: 0, message: 'ok', data: rows[0] })
+  } catch (e) {
+    console.error('[employees detail] error:', e)
+    res.status(500).json({ code: 500, message: e.message })
+  }
+}
+
+// POST /api/employees —— 新增
+async function create(req, res) {
+  const {
+    name, gender, age, education, department,
+    entry_date, position, salary, phone, email, status, remark,
+  } = req.body || {}
+
+  if (!name) {
+    return res.status(400).json({ code: 400, message: '员工姓名必填' })
+  }
+
+  try {
+    const [result] = await pool.query(
+      `INSERT INTO employees (name, gender, age, education, department, entry_date, position, salary, phone, email, status, remark)
+       VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`,
+      [name,
+        gender || null,
+        age !== undefined ? age : null,
+        education || null,
+        department || null,
+        entry_date || null,
+        position || null,
+        salary !== undefined ? salary : null,
+        phone || null,
+        email || null,
+        status !== undefined ? status : 1,
+        remark || null]
+    )
+    const [rows] = await pool.query('SELECT * FROM employees WHERE id = ?', [result.insertId])
+    res.json({ code: 0, message: 'ok', data: rows[0] })
+  } catch (e) {
+    console.error('[employees create] error:', e)
+    res.status(500).json({ code: 500, message: e.message })
+  }
+}
+
+// PUT /api/employees/:id —— 更新
+async function update(req, res) {
+  const { id } = req.params
+  const fields = [
+    'name', 'gender', 'age', 'education', 'department',
+    'entry_date', 'position', 'salary', 'phone', 'email', 'status', 'remark',
+  ]
+
+  try {
+    const [existing] = await pool.query('SELECT id FROM employees WHERE id = ?', [id])
+    if (existing.length === 0) {
+      return res.status(404).json({ code: 404, message: '员工不存在' })
+    }
+
+    const sets = []
+    const params = []
+    for (const f of fields) {
+      if (req.body[f] !== undefined) {
+        sets.push(`${f} = ?`)
+        params.push(req.body[f])
+      }
+    }
+    if (sets.length === 0) {
+      return res.status(400).json({ code: 400, message: '没有需要更新的字段' })
+    }
+
+    params.push(id)
+    await pool.query(`UPDATE employees SET ${sets.join(', ')} WHERE id = ?`, params)
+
+    const [rows] = await pool.query('SELECT * FROM employees WHERE id = ?', [id])
+    res.json({ code: 0, message: 'ok', data: rows[0] })
+  } catch (e) {
+    console.error('[employees update] error:', e)
+    res.status(500).json({ code: 500, message: e.message })
+  }
+}
+
+// DELETE /api/employees/:id —— 删除
+async function remove(req, res) {
+  const { id } = req.params
+  try {
+    const [existing] = await pool.query('SELECT id FROM employees WHERE id = ?', [id])
+    if (existing.length === 0) {
+      return res.status(404).json({ code: 404, message: '员工不存在' })
+    }
+    await pool.query('DELETE FROM employees WHERE id = ?', [id])
+    res.json({ code: 0, message: 'ok' })
+  } catch (e) {
+    console.error('[employees delete] error:', e)
+    res.status(500).json({ code: 500, message: e.message })
+  }
+}
+
+module.exports = { list, detail, create, update, remove }
diff --git a/routes/products.js b/routes/products.js
new file mode 100644
index 0000000..601766d
--- /dev/null
+++ b/routes/products.js
@@ -0,0 +1,157 @@
+// routes/products.js —— 产品管理 CRUD
+const { pool } = require('../db')
+
+function pagination(query) {
+  const page = Math.max(Number(query.page) || 1, 1)
+  const pageSize = Math.min(Math.max(Number(query.pageSize) || 10, 1), 100)
+  const offset = (page - 1) * pageSize
+  return { page, pageSize, offset }
+}
+
+// GET /api/products —— 列表
+async function list(req, res) {
+  try {
+    const { page, pageSize, offset } = pagination(req.query)
+    const { name, type, supplier } = req.query
+
+    let where = 'WHERE 1=1'
+    const params = []
+
+    if (name) {
+      where += ' AND name LIKE ?'
+      params.push(`%${name}%`)
+    }
+    if (type) {
+      where += ' AND type LIKE ?'
+      params.push(`%${type}%`)
+    }
+    if (supplier) {
+      where += ' AND supplier LIKE ?'
+      params.push(`%${supplier}%`)
+    }
+
+    const [[{ total }]] = await pool.query(
+      `SELECT COUNT(*) AS total FROM products ${where}`,
+      params
+    )
+
+    const [rows] = await pool.query(
+      `SELECT * FROM products ${where} ORDER BY id DESC LIMIT ? OFFSET ?`,
+      [...params, pageSize, offset]
+    )
+
+    res.json({
+      code: 0,
+      message: 'ok',
+      data: {
+        list: rows,
+        total,
+        page,
+        pageSize,
+        totalPages: Math.ceil(total / pageSize),
+      },
+    })
+  } catch (e) {
+    console.error('[products list] error:', e)
+    res.status(500).json({ code: 500, message: e.message })
+  }
+}
+
+// GET /api/products/:id —— 详情
+async function detail(req, res) {
+  try {
+    const [rows] = await pool.query('SELECT * FROM products WHERE id = ?', [req.params.id])
+    if (rows.length === 0) {
+      return res.status(404).json({ code: 404, message: '产品不存在' })
+    }
+    res.json({ code: 0, message: 'ok', data: rows[0] })
+  } catch (e) {
+    console.error('[products detail] error:', e)
+    res.status(500).json({ code: 500, message: e.message })
+  }
+}
+
+// POST /api/products —— 新增
+async function create(req, res) {
+  const {
+    name, type, quantity, price, unit, specification, supplier, remark,
+  } = req.body || {}
+
+  if (!name) {
+    return res.status(400).json({ code: 400, message: '产品名称必填' })
+  }
+
+  try {
+    const [result] = await pool.query(
+      `INSERT INTO products (name, type, quantity, price, unit, specification, supplier, remark)
+       VALUES (?, ?, ?, ?, ?, ?, ?, ?)`,
+      [name,
+        type || null,
+        quantity !== undefined ? quantity : 0,
+        price !== undefined ? price : 0.00,
+        unit || '件',
+        specification || null,
+        supplier || null,
+        remark || null]
+    )
+    const [rows] = await pool.query('SELECT * FROM products WHERE id = ?', [result.insertId])
+    res.json({ code: 0, message: 'ok', data: rows[0] })
+  } catch (e) {
+    console.error('[products create] error:', e)
+    res.status(500).json({ code: 500, message: e.message })
+  }
+}
+
+// PUT /api/products/:id —— 更新
+async function update(req, res) {
+  const { id } = req.params
+  const fields = [
+    'name', 'type', 'quantity', 'price', 'unit', 'specification', 'supplier', 'remark',
+  ]
+
+  try {
+    const [existing] = await pool.query('SELECT id FROM products WHERE id = ?', [id])
+    if (existing.length === 0) {
+      return res.status(404).json({ code: 404, message: '产品不存在' })
+    }
+
+    const sets = []
+    const params = []
+    for (const f of fields) {
+      if (req.body[f] !== undefined) {
+        sets.push(`${f} = ?`)
+        params.push(req.body[f])
+      }
+    }
+    if (sets.length === 0) {
+      return res.status(400).json({ code: 400, message: '没有需要更新的字段' })
+    }
+
+    params.push(id)
+    await pool.query(`UPDATE products SET ${sets.join(', ')} WHERE id = ?`, params)
+
+    const [rows] = await pool.query('SELECT * FROM products WHERE id = ?', [id])
+    res.json({ code: 0, message: 'ok', data: rows[0] })
+  } catch (e) {
+    console.error('[products update] error:', e)
+    res.status(500).json({ code: 500, message: e.message })
+  }
+}
+
+// DELETE /api/products/:id —— 删除
+async function remove(req, res) {
+  const { id } = req.params
+  try {
+    const [existing] = await pool.query('SELECT id FROM products WHERE id = ?', [id])
+    if (existing.length === 0) {
+      return res.status(404).json({ code: 404, message: '产品不存在' })
+    }
+    await pool.query('DELETE FROM products WHERE id = ?', [id])
+    res.json({ code: 0, message: 'ok' })
+  } catch (e) {
+    console.error('[products delete] error:', e)
+    res.status(500).json({ code: 500, message: e.message })
+  }
+}
+
+module.exports = { list, detail, create, update, remove }
diff --git a/routes/users.js b/routes/users.js
new file mode 100644
index 0000000..be1803a
--- /dev/null
+++ b/routes/users.js
@@ -0,0 +1,322 @@
+// routes/users.js —— 用户登录 / 信息 / CRUD
+const jwt = require('jsonwebtoken')
+const bcrypt = require('bcryptjs')
+const { pool } = require('../db')
+
+// 安全字段：不返回密码哈希
+const SAFE_FIELDS = 'id, username, real_name, role, status, created_at, updated_at'
+
+function pagination(query) {
+  const page = Math.max(Number(query.page) || 1, 1)
+  const pageSize = Math.min(Math.max(Number(query.pageSize) || 10, 1), 100)
+  const offset = (page - 1) * pageSize
+  return { page, pageSize, offset }
+}
+
+// ========== 登录 / 登出 / 个人信息 ==========
+
+// POST /api/user/login —— 登录（无需 token）
+async function login(req, res) {
+  const { username, password } = req.body || {}
+  if (!username || !password) {
+    return res.status(400).json({ code: 400, message: '用户名和密码必填' })
+  }
+
+  try {
+    const [rows] = await pool.query(
+      'SELECT id, username, password, real_name, role, status FROM users WHERE username = ?',
+      [username]
+    )
+
+    // 用户不存在或密码错，统一提示避免枚举
+    if (rows.length === 0) {
+      return res.status(400).json({ code: 400, message: '账号或密码错误' })
+    }
+    const user = rows[0]
+
+    // 检查账号是否被禁用
+    if (user.status === 0) {
+      return res.status(403).json({ code: 403, message: '账号已被禁用，请联系管理员' })
+    }
+
+    const ok = await bcrypt.compare(password, user.password)
+    if (!ok) {
+      return res.status(400).json({ code: 400, message: '账号或密码错误' })
+    }
+
+    const token = jwt.sign(
+      { id: user.id, username: user.username, role: user.role },
+      process.env.JWT_SECRET,
+      { expiresIn: process.env.JWT_EXPIRES_IN || '2h' }
+    )
+
+    res.status(200).json({
+      code: 200,
+      message: 'ok',
+      data: {
+        token,
+        userInfo: {
+          id: user.id,
+          username: user.username,
+          real_name: user.real_name,
+          role: user.role,
+        },
+      },
+    })
+  } catch (e) {
+    console.error('[login] error:', e)
+    res.status(500).json({ code: 500, message: e.message })
+  }
+}
+
+// GET /api/user/info —— 获取当前登录用户信息（需要 token）
+async function info(req, res) {
+  try {
+    const [rows] = await pool.query(
+      `SELECT ${SAFE_FIELDS} FROM users WHERE id = ?`,
+      [req.user.id]
+    )
+    if (rows.length === 0) {
+      return res.status(404).json({ code: 404, message: '用户不存在' })
+    }
+    res.json({ code: 0, message: 'ok', data: rows[0] })
+  } catch (e) {
+    console.error('[info] error:', e)
+    res.status(500).json({ code: 500, message: e.message })
+  }
+}
+
+// POST /api/user/logout —— 登出（需要 token，仅做应答）
+async function logout(req, res) {
+  res.json({ code: 0, message: 'ok' })
+}
+
+// PUT /api/user/password —— 当前用户修改自己的密码（需要 token）
+async function changePassword(req, res) {
+  const { oldPassword, newPassword } = req.body || {}
+  if (!oldPassword || !newPassword) {
+    return res.status(400).json({ code: 400, message: '旧密码和新密码必填' })
+  }
+  if (typeof newPassword !== 'string' || newPassword.length < 6) {
+    return res.status(400).json({ code: 400, message: '新密码至少 6 位' })
+  }
+  if (oldPassword === newPassword) {
+    return res.status(400).json({ code: 400, message: '新密码不能与旧密码相同' })
+  }
+
+  try {
+    const [rows] = await pool.query('SELECT password FROM users WHERE id = ?', [req.user.id])
+    if (rows.length === 0) {
+      return res.status(404).json({ code: 404, message: '用户不存在' })
+    }
+
+    const ok = await bcrypt.compare(oldPassword, rows[0].password)
+    if (!ok) {
+      return res.status(400).json({ code: 400, message: '旧密码错误' })
+    }
+
+    const hash = await bcrypt.hash(newPassword, 10)
+    await pool.query('UPDATE users SET password = ? WHERE id = ?', [hash, req.user.id])
+    res.json({ code: 0, message: '密码修改成功' })
+  } catch (e) {
+    console.error('[changePassword] error:', e)
+    res.status(500).json({ code: 500, message: e.message })
+  }
+}
+
+// ========== 用户管理 CRUD（管理员） ==========
+
+// GET /api/users —— 用户列表（管理员）
+async function list(req, res) {
+  try {
+    const { page, pageSize, offset } = pagination(req.query)
+    const { username, role, status } = req.query
+
+    let where = 'WHERE 1=1'
+    const params = []
+
+    if (username) {
+      where += ' AND username LIKE ?'
+      params.push(`%${username}%`)
+    }
+    if (role) {
+      where += ' AND role = ?'
+      params.push(role)
+    }
+    if (status !== undefined && status !== '') {
+      where += ' AND status = ?'
+      params.push(Number(status))
+    }
+
+    const [[{ total }]] = await pool.query(
+      `SELECT COUNT(*) AS total FROM users ${where}`,
+      params
+    )
+
+    const [rows] = await pool.query(
+      `SELECT ${SAFE_FIELDS} FROM users ${where} ORDER BY id DESC LIMIT ? OFFSET ?`,
+      [...params, pageSize, offset]
+    )
+
+    res.json({
+      code: 0,
+      message: 'ok',
+      data: {
+        list: rows,
+        total,
+        page,
+        pageSize,
+        totalPages: Math.ceil(total / pageSize),
+      },
+    })
+  } catch (e) {
+    console.error('[users list] error:', e)
+    res.status(500).json({ code: 500, message: e.message })
+  }
+}
+
+// GET /api/users/:id —— 用户详情（管理员）
+async function detail(req, res) {
+  try {
+    const [rows] = await pool.query(
+      `SELECT ${SAFE_FIELDS} FROM users WHERE id = ?`,
+      [req.params.id]
+    )
+    if (rows.length === 0) {
+      return res.status(404).json({ code: 404, message: '用户不存在' })
+    }
+    res.json({ code: 0, message: 'ok', data: rows[0] })
+  } catch (e) {
+    console.error('[users detail] error:', e)
+    res.status(500).json({ code: 500, message: e.message })
+  }
+}
+
+// POST /api/users —— 创建用户（管理员）
+async function create(req, res) {
+  const { username, password, real_name = null, role = 'user', status = 1 } = req.body || {}
+
+  if (!username || !password) {
+    return res.status(400).json({ code: 400, message: '用户名和密码必填' })
+  }
+  if (typeof username !== 'string' || username.length < 3 || username.length > 50) {
+    return res.status(400).json({ code: 400, message: '用户名长度需在 3-50 之间' })
+  }
+  if (typeof password !== 'string' || password.length < 6) {
+    return res.status(400).json({ code: 400, message: '密码至少 6 位' })
+  }
+  if (!['admin', 'user'].includes(role)) {
+    return res.status(400).json({ code: 400, message: '角色只能为 admin 或 user' })
+  }
+
+  try {
+    const hash = await bcrypt.hash(password, 10)
+    const [result] = await pool.query(
+      'INSERT INTO users (username, password, real_name, role, status) VALUES (?, ?, ?, ?, ?)',
+      [username, hash, real_name, role, status]
+    )
+
+    const [rows] = await pool.query(
+      `SELECT ${SAFE_FIELDS} FROM users WHERE id = ?`,
+      [result.insertId]
+    )
+    res.json({ code: 0, message: 'ok', data: rows[0] })
+  } catch (e) {
+    if (e.code === 'ER_DUP_ENTRY') {
+      return res.status(409).json({ code: 409, message: '用户名已存在' })
+    }
+    console.error('[users create] error:', e)
+    res.status(500).json({ code: 500, message: e.message })
+  }
+}
+
+// PUT /api/users/:id —— 更新用户（管理员）
+async function update(req, res) {
+  const { id } = req.params
+  const fields = ['username', 'real_name', 'role', 'status']
+
+  try {
+    const [existing] = await pool.query('SELECT id, role FROM users WHERE id = ?', [id])
+    if (existing.length === 0) {
+      return res.status(404).json({ code: 404, message: '用户不存在' })
+    }
+
+    const targetUser = existing[0]
+
+    // 不允许修改自己的角色或禁用自己
+    if (Number(id) === req.user.id) {
+      if (req.body.role !== undefined && req.body.role !== req.user.role) {
+        return res.status(400).json({ code: 400, message: '不能修改自己的角色' })
+      }
+      if (req.body.status === 0) {
+        return res.status(400).json({ code: 400, message: '不能禁用自己' })
+      }
+    }
+
+    const sets = []
+    const params = []
+
+    for (const f of fields) {
+      if (req.body[f] !== undefined) {
+        // role 字段只允许 admin / user
+        if (f === 'role' && !['admin', 'user'].includes(req.body[f])) {
+          return res.status(400).json({ code: 400, message: '角色只能为 admin 或 user' })
+        }
+        sets.push(`${f} = ?`)
+        params.push(req.body[f])
+      }
+    }
+
+    // 密码单独处理
+    if (req.body.password !== undefined) {
+      if (typeof req.body.password !== 'string' || req.body.password.length < 6) {
+        return res.status(400).json({ code: 400, message: '密码至少 6 位' })
+      }
+      const hash = await bcrypt.hash(req.body.password, 10)
+      sets.push('password = ?')
+      params.push(hash)
+    }
+
+    if (sets.length === 0) {
+      return res.status(400).json({ code: 400, message: '没有需要更新的字段' })
+    }
+
+    params.push(id)
+    await pool.query(`UPDATE users SET ${sets.join(', ')} WHERE id = ?`, params)
+
+    const [rows] = await pool.query(
+      `SELECT ${SAFE_FIELDS} FROM users WHERE id = ?`,
+      [id]
+    )
+    res.json({ code: 0, message: 'ok', data: rows[0] })
+  } catch (e) {
+    if (e.code === 'ER_DUP_ENTRY') {
+      return res.status(409).json({ code: 409, message: '用户名已存在' })
+    }
+    console.error('[users update] error:', e)
+    res.status(500).json({ code: 500, message: e.message })
+  }
+}
+
+// DELETE /api/users/:id —— 删除用户（管理员）
+async function remove(req, res) {
+  const { id } = req.params
+  try {
+    if (Number(id) === req.user.id) {
+      return res.status(400).json({ code: 400, message: '不能删除自己' })
+    }
+
+    const [existing] = await pool.query('SELECT id FROM users WHERE id = ?', [id])
+    if (existing.length === 0) {
+      return res.status(404).json({ code: 404, message: '用户不存在' })
+    }
+
+    await pool.query('DELETE FROM users WHERE id = ?', [id])
+    res.json({ code: 0, message: 'ok' })
+  } catch (e) {
+    console.error('[users delete] error:', e)
+    res.status(500).json({ code: 500, message: e.message })
+  }
+}
+
+module.exports = { login, info, logout, changePassword, list, detail, create, update, remove }
diff --git a/server.js b/server.js
index e76ae9a..bf72ed4 100644
--- a/server.js
+++ b/server.js
@@ -1,15 +1,20 @@
-// server.js —— 启动服务 + 鉴权中间件 + 3 个接口
+// server.js —— 启动服务 + 鉴权中间件 + 全部 CRUD 路由
 require('dotenv').config()
 const express = require('express')
-const jwt = require('jsonwebtoken')
-const bcrypt = require('bcryptjs')
 const { pool, initDB } = require('./db')
 
+// 导入各模块路由
+const users = require('./routes/users')
+const customers = require('./routes/customers')
+const employees = require('./routes/employees')
+const contracts = require('./routes/contracts')
+const afterSales = require('./routes/afterSales')
+const products = require('./routes/products')
+
 const app = express()
 app.use(express.json())   // 解析 application/json 请求体
 
 // ============ 鉴权中间件 ============
-// 验证请求头里的 Bearer token，把解析出来的用户挂到 req.user
 function auth(req, res, next) {
   const header = req.headers.authorization || ''
   const token = header.replace(/^Bearer\s+/i, '')
@@ -17,6 +22,7 @@ function auth(req, res, next) {
     return res.status(401).json({ code: 401, message: '未登录' })
   }
   try {
+    const jwt = require('jsonwebtoken')
     req.user = jwt.verify(token, process.env.JWT_SECRET)
     next()
   } catch (e) {
@@ -25,7 +31,6 @@ function auth(req, res, next) {
 }
 
 // ============ 管理员校验中间件 ============
-// 必须排在 auth 之后使用（依赖 req.user）
 function requireAdmin(req, res, next) {
   if (!req.user || req.user.role !== 'admin') {
     return res.status(403).json({ code: 403, message: '需要管理员权限' })
@@ -33,141 +38,71 @@ function requireAdmin(req, res, next) {
   next()
 }
 
-// ============ POST /api/login ============
-app.post('/api/user/login', async (req, res) => {
-  const { username, password } = req.body || {}
-  if (!username || !password) {
-    return res.status(400).json({ code: 400, message: '用户名和密码必填' })
-  }
+// ============ 登录/登出/个人信息 ============
+app.post('/api/user/login',        users.login)
+app.get('/api/user/info',          auth, users.info)
+app.post('/api/user/logout',       auth, users.logout)
+app.put('/api/user/password',      auth, users.changePassword)
 
-  try {
-    const [rows] = await pool.query(
-      'SELECT id, username, password, nickname, avatar, role FROM users WHERE username = ?',
-      [username]
-    )
+// ============ 用户管理 CRUD（管理员）/api/users ============
+app.get('/api/users',              auth, requireAdmin, users.list)
+app.get('/api/users/:id',          auth, requireAdmin, users.detail)
+app.post('/api/users',             auth, requireAdmin, users.create)
+app.put('/api/users/:id',          auth, requireAdmin, users.update)
+app.delete('/api/users/:id',       auth, requireAdmin, users.remove)
 
-    // 用户不存在 或 密码错 —— 都用同一条提示，避免被枚举账号
-    if (rows.length === 0) {
-      return res.status(400).json({ code: 400, message: '账号或密码错误' })
-    }
-    const user = rows[0]
-    const ok = await bcrypt.compare(password, user.password)
-    if (!ok) {
-      return res.status(400).json({ code: 400, message: '账号或密码错误' })
-    }
+// ============ 客户管理 /api/customers ============
+app.get('/api/customers',          auth, customers.list)
+app.get('/api/customers/:id',      auth, customers.detail)
+app.post('/api/customers',         auth, customers.create)
+app.put('/api/customers/:id',      auth, customers.update)
+app.delete('/api/customers/:id',   auth, customers.remove)
 
-    // 签 token：payload 里放 id / username / role
-    const token = jwt.sign(
-      { id: user.id,
-        username: user.username,
-        role: user.role },
+// ============ 员工管理 /api/employees ============
+app.get('/api/employees',          auth, employees.list)
+app.get('/api/employees/:id',      auth, employees.detail)
+app.post('/api/employees',         auth, employees.create)
+app.put('/api/employees/:id',      auth, employees.update)
+app.delete('/api/employees/:id',   auth, employees.remove)
 
-      process.env.JWT_SECRET,
+// ============ 合同管理 /api/contracts ============
+app.get('/api/contracts',          auth, contracts.list)
+app.get('/api/contracts/:id',      auth, contracts.detail)
+app.post('/api/contracts',         auth, contracts.create)
+app.put('/api/contracts/:id',      auth, contracts.update)
+app.delete('/api/contracts/:id',   auth, contracts.remove)
 
-      { expiresIn: process.env.JWT_EXPIRES_IN || '2h' }
-    )
+// ============ 售后管理 /api/after-sales ============
+app.get('/api/after-sales',        auth, afterSales.list)
+app.get('/api/after-sales/:id',    auth, afterSales.detail)
+app.post('/api/after-sales',       auth, afterSales.create)
+app.put('/api/after-sales/:id',    auth, afterSales.update)
+app.delete('/api/after-sales/:id', auth, afterSales.remove)
 
-    res.status(200).json({
-      code: 200,
-      message: 'ok',
-      data: {
-        token,
-        userInfo: {
-          id: user.id,
-          username: user.username,
-          nickname: user.nickname,
-          avatar: user.avatar,
-          role: user.role,
-        },
-      },
-    })
-  } catch (e) {
-    console.error('[login] error:', e)
-    res.status(500).json({ code: 500, message: e.message })
-  }
-})
-
-// ============ GET /api/info ============
-// 需要登录后访问，前端刷新页面时调用，用来拿最新的用户信息
-app.get('/api/user/info', auth, async (req, res) => {
-  try {
-    const [rows] = await pool.query(
-      'SELECT id, username, nickname, avatar, role FROM users WHERE id = ?',
-      [req.user.id]
-    )
-    if (rows.length === 0) {
-      return res.status(404).json({ code: 404, message: '用户不存在' })
-    }
-    res.json({ code: 0, message: 'ok', data: rows[0] })
-  } catch (e) {
-    console.error('[info] error:', e)
-    res.status(500).json({ code: 500, message: e.message })
-  }
-})
-
-// ============ POST /api/logout ============
-// JWT 是无状态的：后端没法"作废"token，主流做法是前端清掉 localStorage 里的 token
-// 这里只是给前端一个明确的应答，告诉你"我收到了"
-app.post('/api/user/logout', auth, (req, res) => {
-  res.json({ code: 0, message: 'ok' })
-})
-
-// ============ POST /api/user/create ============
-// 仅管理员可调用：在 users 表里新增一行
-app.post('/api/user/create', auth, requireAdmin, async (req, res) => {
-  //role不填默认user
-  const { username, password, nickname = '', role = 'user' } = req.body || {}
-
-  // 1) 入参校验
-  if (!username || !password) {
-    return res.status(400).json({ code: 400, message: '用户名和密码必填' })
-  }
-  if (typeof username !== 'string' || username.length < 3 || username.length > 50) {
-    return res.status(400).json({ code: 400, message: '用户名长度需在 3-50 之间' })
-  }
-  if (typeof password !== 'string' || password.length < 6) {
-    return res.status(400).json({ code: 400, message: '密码至少 6 位' })
-  }
-
-  try {
-    // 2) 密码哈希（10 轮 salt，与 db.js initDB 的 admin 同强度）
-    const hash = await bcrypt.hash(password, 10)
-
-    // 3) 写入数据库；role 不强制 'user'，允许前端传来的 role
-    const [result] = await pool.query(
-      'INSERT INTO users (username, password, nickname, role) VALUES (?, ?, ?, ?)',
-      [username, hash, nickname, role]
-    )
-
-    // 4) 把新行的关键信息回给前端（不包含 password 哈希）
-    res.json({
-      code: 0,
-      message: 'ok',
-      data: { id: result.insertId, username, nickname, role: role },
-    })
-  } catch (e) {
-    // users.username 是 UNIQUE，重复时 MySQL 抛 ER_DUP_ENTRY (errno 1062)
-    if (e.code === 'ER_DUP_ENTRY') {
-      return res.status(409).json({ code: 409, message: '用户名已存在' })
-    }
-    console.error('[create user] error:', e)
-    res.status(500).json({ code: 500, message: e.message })
-  }
-})
+// ============ 产品管理 /api/products ============
+app.get('/api/products',           auth, products.list)
+app.get('/api/products/:id',       auth, products.detail)
+app.post('/api/products',          auth, products.create)
+app.put('/api/products/:id',       auth, products.update)
+app.delete('/api/products/:id',    auth, products.remove)
 
 // ============ 启动 ============
 const PORT = Number(process.env.PORT) || 3000
 
-initDB()
-  .then(() => {
-    app.listen(PORT, () => {
-      console.log(`[server] 已启动 → http://127.0.0.1:${PORT}`)
-      console.log(`[test]   curl -X POST http://127.0.0.1:${PORT}/api/login \\`)
-      console.log(`            -H "Content-Type: application/json" \\`)
-      console.log(`            -d '{"username":"admin","password":"123456"}'`)
+module.exports = app
+
+if (require.main === module) {
+  initDB()
+    .then(() => {
+      app.listen(PORT, () => {
+        console.log(`[server] 已启动 → http://127.0.0.1:${PORT}`)
+        console.log(`[test]   curl -X POST http://127.0.0.1:${PORT}/api/user/login \\`)
+        console.log(`            -H "Content-Type: application/json" \\`)
+        console.log(`            -d '{"username":"admin","password":"123456"}'`)
+      })
     })
-  })
-  .catch((err) => {
-    console.error('[init] 数据库初始化失败：', err)
-    process.exit(1)
-  })
+    .catch((err) => {
+      console.error('[init] 数据库初始化失败：', err)
+      process.exit(1)
+    })
+}
diff --git a/test-all.js b/test-all.js
new file mode 100644
index 0000000..7faca2d
--- /dev/null
+++ b/test-all.js
@@ -0,0 +1,354 @@
+// test-all.js —— 手动运行，逐接口验证全部 CRUD
+// 用法: node test-all.js
+require('dotenv').config()
+const http = require('http')
+
+const BASE = 'http://127.0.0.1:3000'
+let token = ''
+let failCount = 0
+let passCount = 0
+
+// ========== 工具函数 ==========
+function req(method, path, body, useToken = true) {
+  return new Promise((resolve, reject) => {
+    const u = new URL(path, BASE)
+    const opts = {
+      hostname: u.hostname, port: u.port, path: u.pathname + u.search, method,
+      headers: { 'Content-Type': 'application/json' },
+    }
+    if (useToken && token) opts.headers['Authorization'] = 'Bearer ' + token
+
+    const r = http.request(opts, (res) => {
+      let d = ''
+      res.on('data', (c) => (d += c))
+      res.on('end', () => {
+        try { resolve({ status: res.statusCode, body: JSON.parse(d) }) }
+        catch { resolve({ status: res.statusCode, body: d.substring(0, 300) }) }
+      })
+    })
+    r.on('error', reject)
+    if (body) r.write(JSON.stringify(body))
+    r.end()
+  })
+}
+
+function check(label, res, expectStatus, expectInfo) {
+  const ok = res.status === expectStatus
+  if (ok) {
+    passCount++
+    console.log(`  ✅ ${label}`)
+  } else {
+    failCount++
+    console.log(`  ❌ ${label}  预期 HTTP ${expectStatus}, 实际 HTTP ${res.status}`)
+    console.log(`     响应: ${JSON.stringify(res.body).substring(0, 200)}`)
+  }
+  if (expectInfo) console.log(`     ↳ ${expectInfo}`)
+}
+
+// ========== 主流程 ==========
+async function main() {
+  console.log('╔══════════════════════════════════════════╗')
+  console.log('║   企业管理系统 — 接口全量测试              ║')
+  console.log('╚══════════════════════════════════════════╝')
+  console.log(`服务地址: ${BASE}\n`)
+
+  // ────────── 1. 登录 ──────────
+  console.log('━'.repeat(50))
+  console.log('【1】 用户登录模块')
+  console.log('━'.repeat(50))
+
+  let r = await req('POST', '/api/user/login', { username: 'admin', password: '123456' }, false)
+  check('POST /api/user/login (正确密码)', r, 200)
+  if (r.body?.data?.token) {
+    token = r.body.data.token
+    console.log(`     ↳ 角色: ${r.body.data.userInfo.role}, 姓名: ${r.body.data.userInfo.real_name}`)
+  }
+
+  r = await req('POST', '/api/user/login', { username: 'admin', password: 'wrong' }, false)
+  check('POST /api/user/login (错误密码)', r, 400, '→ 账号或密码错误')
+
+  r = await req('POST', '/api/user/login', { username: '', password: '' }, false)
+  check('POST /api/user/login (空参数)', r, 400, '→ 用户名和密码必填')
+
+  // ────────── 2. 个人信息 ──────────
+  console.log('\n━'.repeat(50))
+  console.log('【2】 个人信息 & 改密')
+  console.log('━'.repeat(50))
+
+  r = await req('GET', '/api/user/info')
+  check('GET /api/user/info', r, 200)
+  if (r.body?.data) console.log(`     ↳ 用户名: ${r.body.data.username}, 角色: ${r.body.data.role}`)
+
+  r = await req('POST', '/api/user/logout')
+  check('POST /api/user/logout', r, 200, '→ JWT 无状态，前端删 token 即可')
+
+  r = await req('PUT', '/api/user/password', { oldPassword: 'wrong', newPassword: 'newpwd999' })
+  check('PUT /api/user/password (旧密码错)', r, 400, '→ 旧密码错误')
+
+  r = await req('PUT', '/api/user/password', { oldPassword: '123456', newPassword: '123456' })
+  check('PUT /api/user/password (新旧相同)', r, 400, '→ 新密码不能与旧密码相同')
+
+  r = await req('PUT', '/api/user/password', { oldPassword: '123456', newPassword: '123' })
+  check('PUT /api/user/password (新密码太短)', r, 400, '→ 新密码至少 6 位')
+
+  // ────────── 3. 用户管理 CRUD ──────────
+  console.log('\n━'.repeat(50))
+  console.log('【3】 用户管理 CRUD（管理员）')
+  console.log('━'.repeat(50))
+
+  r = await req('GET', '/api/users?page=1&pageSize=10')
+  check('GET /api/users (列表)', r, 200)
+  if (r.body?.data) console.log(`     ↳ 共 ${r.body.data.total} 个用户, 本页 ${r.body.data.list?.length} 条`)
+
+  const ts = Date.now()
+  const newUser = `tester_${ts}`
+  r = await req('POST', '/api/users', { username: newUser, password: 'pass123', real_name: '测试员', role: 'user' })
+  check('POST /api/users (创建)', r, 200)
+  let userId = r.body?.data?.id
+  if (userId) console.log(`     ↳ 新建用户 ID: ${userId}, 用户名: ${newUser}`)
+
+  r = await req('POST', '/api/users', { username: 'admin', password: '123456' })
+  check('POST /api/users (重复用户名)', r, 409, '→ 用户名已存在')
+
+  r = await req('POST', '/api/users', { username: 'bad', password: '12', role: 'superman' })
+  check('POST /api/users (非法角色)', r, 400, '→ 角色只能为 admin 或 user')
+
+  if (userId) {
+    r = await req('GET', '/api/users/' + userId)
+    check('GET /api/users/:id (详情)', r, 200)
+
+    r = await req('PUT', '/api/users/' + userId, { real_name: '改名后的测试员', status: 1 })
+    check('PUT /api/users/:id (更新姓名)', r, 200)
+    if (r.body?.data) console.log(`     ↳ 新姓名: ${r.body.data.real_name}`)
+
+    r = await req('PUT', '/api/users/' + userId, { password: 'newpass456' })
+    check('PUT /api/users/:id (管理员重置密码)', r, 200, '→ 管理员可直接改他人密码')
+
+    // 用新用户登录验证改密成功
+    const r2 = await req('POST', '/api/user/login', { username: newUser, password: 'newpass456' }, false)
+    check('  └ 新用户用新密码登录', r2, 200)
+
+    // 测试非管理员访问
+    const userToken = r2.body?.data?.token
+    if (userToken) {
+      const oldToken = token
+      token = userToken
+      r = await req('GET', '/api/users')
+      check('  └ 普通用户访问用户列表', r, 403, '→ 需要管理员权限')
+      token = oldToken
+    }
+
+    r = await req('DELETE', '/api/users/' + userId)
+    check('DELETE /api/users/:id (删除)', r, 200)
+  }
+
+  r = await req('DELETE', '/api/users/1')
+  check('DELETE /api/users/1 (删自己)', r, 400, '→ 不能删除自己')
+
+  r = await req('GET', '/api/users', null, false)
+  check('GET /api/users (无 token)', r, 401, '→ 未登录')
+
+  // ────────── 4. 客户管理 ──────────
+  console.log('\n━'.repeat(50))
+  console.log('【4】 客户管理 CRUD')
+  console.log('━'.repeat(50))
+
+  r = await req('GET', '/api/customers?page=1&pageSize=10')
+  check('GET /api/customers (列表)', r, 200)
+  if (r.body?.data) console.log(`     ↳ 共 ${r.body.data.total} 条`)
+
+  r = await req('POST', '/api/customers', { name: '测试加盟商', phone: '13800001111', province: '广东', city: '东莞', district: '松山湖', address: '科技路88号', customer_type: 'VIP', email: 'test@test.com' })
+  check('POST /api/customers (创建VIP客户)', r, 200)
+  let custId = r.body?.data?.id
+  if (custId) console.log(`     ↳ 新建客户 ID: ${custId}, 类型: ${r.body.data.customer_type}`)
+
+  r = await req('POST', '/api/customers', { name: '' })
+  check('POST /api/customers (缺姓名)', r, 400, '→ 客户姓名必填')
+
+  // 不传 customer_type 应为默认 Normal
+  r = await req('POST', '/api/customers', { name: '默认类型测试' })
+  check('POST /api/customers (不传类型默认Normal)', r, 200)
+  if (r.body?.data) console.log(`     ↳ 默认类型: ${r.body.data.customer_type}`)
+  if (r.body?.data?.id) await req('DELETE', '/api/customers/' + r.body.data.id)
+
+  if (custId) {
+    r = await req('GET', '/api/customers/' + custId)
+    check('GET /api/customers/:id (详情)', r, 200)
+
+    r = await req('PUT', '/api/customers/' + custId, { phone: '13900002222', customer_type: 'Normal', remark: '更新备注' })
+    check('PUT /api/customers/:id (更新类型+电话)', r, 200)
+    if (r.body?.data) console.log(`     ↳ 更新后类型: ${r.body.data.customer_type}, 电话: ${r.body.data.phone}`)
+
+    r = await req('GET', '/api/customers?name=测试')
+    check('GET /api/customers?name=测试 (按姓名搜索)', r, 200)
+
+    r = await req('GET', '/api/customers?customer_type=Normal')
+    check('GET /api/customers?customer_type=Normal (按类型筛选)', r, 200)
+    if (r.body?.data) console.log(`     ↳ Normal 类型共 ${r.body.data.total} 条`)
+
+    r = await req('DELETE', '/api/customers/' + custId)
+    check('DELETE /api/customers/:id (删除)', r, 200)
+  }
+
+  r = await req('GET', '/api/customers/99999')
+  check('GET /api/customers/99999 (不存在)', r, 404, '→ 客户不存在')
+
+  // ────────── 5. 员工管理 ──────────
+  console.log('\n━'.repeat(50))
+  console.log('【5】 员工管理 CRUD')
+  console.log('━'.repeat(50))
+
+  r = await req('GET', '/api/employees?page=1&pageSize=10')
+  check('GET /api/employees (列表)', r, 200)
+
+  r = await req('POST', '/api/employees', { name: '测试员工', gender: '男', age: 30, education: '本科', department: '研发部', position: '工程师', salary: 15000, phone: '13700000001', email: 'emp@test.com' })
+  check('POST /api/employees (创建)', r, 200)
+  let empId = r.body?.data?.id
+  if (empId) console.log(`     ↳ 新建员工 ID: ${empId}, 部门: ${r.body.data.department}`)
+
+  if (empId) {
+    r = await req('GET', '/api/employees/' + empId)
+    check('GET /api/employees/:id (详情)', r, 200)
+
+    r = await req('PUT', '/api/employees/' + empId, { salary: 18000, position: '高级工程师' })
+    check('PUT /api/employees/:id (更新)', r, 200)
+
+    r = await req('GET', '/api/employees?status=1')
+    check('GET /api/employees?status=1 (在职筛选)', r, 200)
+
+    r = await req('DELETE', '/api/employees/' + empId)
+    check('DELETE /api/employees/:id (删除)', r, 200)
+  }
+
+  // ────────── 6. 产品管理 ──────────
+  console.log('\n━'.repeat(50))
+  console.log('【6】 产品管理 CRUD')
+  console.log('━'.repeat(50))
+
+  r = await req('GET', '/api/products?page=1&pageSize=10')
+  check('GET /api/products (列表)', r, 200)
+
+  r = await req('POST', '/api/products', { name: '测试产品-X1', type: '电子产品', quantity: 500, price: 299.99, unit: '台', specification: '型号 X1-2026', supplier: '供应商A' })
+  check('POST /api/products (创建)', r, 200)
+  let prodId = r.body?.data?.id
+  if (prodId) console.log(`     ↳ 新建产品 ID: ${prodId}, 库存: ${r.body.data.quantity}`)
+
+  if (prodId) {
+    r = await req('GET', '/api/products/' + prodId)
+    check('GET /api/products/:id (详情)', r, 200)
+
+    r = await req('PUT', '/api/products/' + prodId, { price: 259.99, quantity: 480 })
+    check('PUT /api/products/:id (更新价格库存)', r, 200)
+
+    r = await req('GET', '/api/products?name=测试')
+    check('GET /api/products?name=测试 (搜索)', r, 200)
+
+    r = await req('DELETE', '/api/products/' + prodId)
+    check('DELETE /api/products/:id (删除)', r, 200)
+  }
+
+  // ────────── 7. 合同管理 ──────────
+  console.log('\n━'.repeat(50))
+  console.log('【7】 合同管理 CRUD（关联客户+员工）')
+  console.log('━'.repeat(50))
+
+  // 先创建客户和员工做外键
+  const cRes = await req('POST', '/api/customers', { name: '合同测试客户' })
+  const eRes = await req('POST', '/api/employees', { name: '合同业务员' })
+  const cId = cRes.body?.data?.id
+  const eId = eRes.body?.data?.id
+  console.log(`     ↳ 先创建客户(${cId}) 和 员工(${eId}) 供合同关联`)
+
+  r = await req('POST', '/api/contracts', { customer_id: cId, contract_name: '年度供货协议', contract_no: 'HT-2026-088', amount: 500000, effective_date: '2026-06-01', expiry_date: '2027-05-31', employee_id: eId, status: '生效' })
+  check('POST /api/contracts (创建)', r, 200)
+  let conId = r.body?.data?.id
+  if (conId) {
+    console.log(`     ↳ 新建合同 ID: ${conId}`)
+    if (r.body?.data?.customer_name) console.log(`     ↳ 联查客户: ${r.body.data.customer_name}, 业务员: ${r.body.data.employee_name}`)
+  }
+
+  r = await req('POST', '/api/contracts', { customer_id: 99999, contract_name: '无效合同' })
+  check('POST /api/contracts (客户不存在)', r, 400, '→ 关联客户不存在')
+
+  if (conId) {
+    r = await req('GET', '/api/contracts')
+    check('GET /api/contracts (列表)', r, 200)
+
+    r = await req('GET', '/api/contracts/' + conId)
+    check('GET /api/contracts/:id (详情)', r, 200)
+
+    r = await req('PUT', '/api/contracts/' + conId, { status: '完成', remark: '已履约' })
+    check('PUT /api/contracts/:id (更新状态)', r, 200)
+
+    r = await req('GET', '/api/contracts?status=完成')
+    check('GET /api/contracts?status=完成 (状态筛选)', r, 200)
+
+    r = await req('DELETE', '/api/contracts/' + conId)
+    check('DELETE /api/contracts/:id (删除)', r, 200)
+  }
+
+  // 清理外键依赖数据
+  if (cId) await req('DELETE', '/api/customers/' + cId)
+  if (eId) await req('DELETE', '/api/employees/' + eId)
+
+  // ────────── 8. 售后管理 ──────────
+  console.log('\n━'.repeat(50))
+  console.log('【8】 售后管理 CRUD（关联客户+员工）')
+  console.log('━'.repeat(50))
+
+  const c2 = await req('POST', '/api/customers', { name: '售后测试客户' })
+  const e2 = await req('POST', '/api/employees', { name: '售后处理员' })
+  const cId2 = c2.body?.data?.id
+  const eId2 = e2.body?.data?.id
+  console.log(`     ↳ 先创建客户(${cId2}) 和 员工(${eId2})`)
+
+  r = await req('POST', '/api/after-sales', { customer_id: cId2, feedback: '设备运行异常，需技术支持', employee_id: eId2, handle_method: '更换故障模块', handle_status: '处理中', service_date: '2026-06-20' })
+  check('POST /api/after-sales (创建)', r, 200)
+  let asId = r.body?.data?.id
+  if (asId) {
+    console.log(`     ↳ 新建售后 ID: ${asId}`)
+    if (r.body?.data?.customer_name) console.log(`     ↳ 联查客户: ${r.body.data.customer_name}, 处理人: ${r.body.data.employee_name}`)
+  }
+
+  r = await req('POST', '/api/after-sales', { customer_id: 99999, feedback: '测试' })
+  check('POST /api/after-sales (客户不存在)', r, 400, '→ 关联客户不存在')
+
+  if (asId) {
+    r = await req('GET', '/api/after-sales')
+    check('GET /api/after-sales (列表)', r, 200)
+
+    r = await req('GET', '/api/after-sales/' + asId)
+    check('GET /api/after-sales/:id (详情)', r, 200)
+
+    r = await req('PUT', '/api/after-sales/' + asId, { handle_status: '已完成', handle_method: '远程升级固件解决' })
+    check('PUT /api/after-sales/:id (更新)', r, 200)
+
+    r = await req('GET', '/api/after-sales?handle_status=已完成')
+    check('GET /api/after-sales?handle_status=已完成 (状态筛选)', r, 200)
+
+    r = await req('DELETE', '/api/after-sales/' + asId)
+    check('DELETE /api/after-sales/:id (删除)', r, 200)
+  }
+
+  if (cId2) await req('DELETE', '/api/customers/' + cId2)
+  if (eId2) await req('DELETE', '/api/employees/' + eId2)
+
+  // ────────── 收尾 ──────────
+  console.log('\n' + '═'.repeat(50))
+  console.log(`测试完成: 通过 ${passCount} / 失败 ${failCount}`)
+  if (failCount > 0) {
+    console.log('⚠️  存在失败用例，请检查上方输出')
+  } else {
+    console.log('🎉 全部接口通过!')
+  }
+  console.log('═'.repeat(50))
+
+  // 优雅退出
+  process.exit(failCount > 0 ? 1 : 0)
+}
+
+main().catch((e) => {
+  console.error('测试异常:', e.message)
+  console.error('请确认服务已启动: node server.js')
+  process.exit(1)
+})