feat(managed-ne): add bulk import template download with device_type reference sheet

Expose GET /v1/managed-ne/import/template and a workbench button to download xlsx/csv templates listing supported Netmiko device types.

Co-authored-by: Cursor <cursoragent@cursor.com>

web/src/i18n/en.ts

@@ -102,6 +102,7 @@ const en = {
       "NETX_CREDENTIAL_SECRET_KEY is not set. Configure a Fernet key in .env and restart the API to store passwords.",
     add: "Add NE",
     importBtn: "Import",
+    downloadTemplate: "Download template",
     importing: "Importing…",
     edit: "Edit",
     delete: "Delete",

web/src/i18n/zh.ts

@@ -101,6 +101,7 @@ const zh = {
     credsNotConfigured: "未配置 NETX_CREDENTIAL_SECRET_KEY，无法保存密码。请在 .env 中设置 Fernet 密钥后重启 API。",
     add: "新增网元",
     importBtn: "批量导入",
+    downloadTemplate: "下载导入模板",
     importing: "导入中…",
     edit: "编辑",
     delete: "删除",

web/src/pages/NePage.tsx

@@ -7,6 +7,7 @@ import {
   fetchManagedNe,
   fetchManagedNeMeta,
   importManagedNe,
+  managedNeImportTemplateUrl,
   updateManagedNe,
 } from "../services/api";
 import { queryKeys } from "../constants/queryKeys";
@@ -233,6 +234,12 @@ export function NePage() {
             <button type="button" onClick={openCreate} disabled={!credsOk}>
               {t("managedNe.add")}
             </button>
+            <button
+              type="button"
+              onClick={() => window.location.assign(managedNeImportTemplateUrl("xlsx"))}
+            >
+              {t("managedNe.downloadTemplate")}
+            </button>
             <button
               type="button"
               onClick={() => importRef.current?.click()}

web/src/services/api.ts

@@ -129,6 +129,9 @@ export const deleteManagedNe = (id: string) => apiDelete<{ ok: boolean }>(`/v1/m
 export const connectTestManagedNe = (ids: string[]) =>
   apiPost<{ ok: boolean; submitted: number }>("/v1/managed-ne/connect-test", { ids });
 
+export const managedNeImportTemplateUrl = (format: "xlsx" | "csv" = "xlsx") =>
+  `/v1/managed-ne/import/template?format=${format}`;
+
 export const importManagedNe = async (file: File): Promise<ManagedNeImportResult> => {
   const form = new FormData();
   form.append("file", file);