feat(forecast): 新增销售预测模板下载接口及类型定义

src/api/forecast/forecast-summary.js

@@ -17,6 +17,7 @@ import request from '@/router/axios'
  * @typedef {import('./types').SalesForecastSummaryPageResponse} SalesForecastSummaryPageResponse
  * @typedef {import('./types').SalesForecastMainListQueryParams} SalesForecastMainListQueryParams
  * @typedef {import('./types').SalesForecastMainListResponse} SalesForecastMainListResponse
+ * @typedef {import('./types').SalesForecastTemplateResponse} SalesForecastTemplateResponse
  */
 
 /**
@@ -298,3 +299,27 @@ export const batchSaveSalesForecastSummary = async (data) => {
     data
   })
 }
+
+/**
+ * 下载“销售预测汇总”导入模板（Excel）
+ * 对应后端：GET /api/blade-factory/api/factory/salesForecastSummary/exportTemplate
+ * 响应为二进制流（Blob），非 JSON；响应头包含 Content-Disposition、Content-Type 等
+ * @returns {Promise<SalesForecastTemplateResponse>} Axios Blob 响应，data 为 Excel 二进制
+ * @example
+ * // 前端触发下载示例：
+ * const res = await exportSalesForecastTemplate()
+ * const blob = new Blob([res.data], { type: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet' })
+ * const url = window.URL.createObjectURL(blob)
+ * const a = document.createElement('a')
+ * a.href = url
+ * a.download = '销售预测模板.xlsx'
+ * a.click()
+ * window.URL.revokeObjectURL(url)
+ */
+export const exportSalesForecastTemplate = async () => {
+  return request({
+    url: '/api/blade-factory/api/factory/salesForecastSummary/exportTemplate',
+    method: 'get',
+    responseType: 'blob'
+  })
+}

src/api/forecast/types.d.ts

@@ -327,3 +327,11 @@ export interface SalesForecastMainAddRequest {
 
 // 新增：销售预测主表（main-add）- 响应类型（data 返回为 null，msg 为提示文本，success 表示成功与否）
 export type SalesForecastMainAddResponse = Promise<AxiosResponse<ApiResponse<null>>>
+// 新增：导出模板响应头类型（仅用于提示，字段名为服务端标准写法）
+export interface DownloadHeaders {
+  'content-disposition'?: string
+  'content-type'?: string
+  date?: string
+}
+// 新增：销售预测模板下载响应类型（Blob + 下载头）
+export type SalesForecastTemplateResponse = Promise<AxiosResponse<Blob> & { headers: DownloadHeaders }>