feat: 使首页的教程placehold支持中文，同时使markdown编辑器同app主题变化

src/stores/equipments.ts

@@ -129,7 +129,7 @@ export const useEquipments = defineStore("equipments", () => {
   async function jtagUploadBitstream(
     bitstream: File,
     examId?: string,
-  ): Promise<number | null> {
+  ): Promise<string | null> {
     try {
       // 自动开启电源
       await powerSetOnOff(true);
@@ -155,7 +155,7 @@ export const useEquipments = defineStore("equipments", () => {
     }
   }
 
-  async function jtagDownloadBitstream(bitstreamId?: number): Promise<string> {
+  async function jtagDownloadBitstream(bitstreamId?: string): Promise<string> {
     if (bitstreamId === null || bitstreamId === undefined) {
       dialog.error("请先选择要下载的比特流");
       return "";