fix: 添加customer.js，修复stock.js参数

src/api/customer.js

@@ -0,0 +1,41 @@
+import api from './index'
+
+/**
+ * 客户相关API
+ */
+export default {
+  /**
+   * 获取客户列表
+   */
+  getCustomers(params) {
+    return api.request('/customers', 'GET', params)
+  },
+
+  /**
+   * 获取客户详情
+   */
+  getCustomer(id) {
+    return api.request(`/customers/${id}`, 'GET')
+  },
+
+  /**
+   * 新增客户
+   */
+  createCustomer(data) {
+    return api.request('/customers', 'POST', data)
+  },
+
+  /**
+   * 修改客户
+   */
+  updateCustomer(id, data) {
+    return api.request(`/customers/${id}`, 'PUT', data)
+  },
+
+  /**
+   * 删除客户
+   */
+  deleteCustomer(id) {
+    return api.request(`/customers/${id}`, 'DELETE')
+  }
+}

src/api/stock.js

@@ -22,14 +22,14 @@ export default {
    * 入库
    */
   stockIn(data) {
-    return api.request('/stock/in', 'POST', null, data)
+    return api.request('/stock/in', 'POST', data)
   },
 
   /**
    * 库存调整
    */
   adjustStock(data) {
-    return api.request('/stock/adjust', 'POST', null, data)
+    return api.request('/stock/adjust', 'POST', data)
   },
 
   /**