feat: 更新课程创建功能，使用内部数字人 ID，更新上传方法

components/SlideCreateCourse.vue

@@ -46,8 +46,9 @@ const selected_titles = ref<TitlesTemplate | null>(null)
 
 watchEffect(() => {
   if (selected_digital_human.value) {
+    // 2025.03.31 使用内部数字人 ID
     createCourseState.digital_human_id =
-      selected_digital_human.value.model_id || selected_digital_human.value.id!
+      selected_digital_human.value.digital_human_id ?? 0
   }
   if (selected_titles.value) {
     createCourseState.opening_url = selected_titles.value.opening_file
@@ -69,7 +70,7 @@ const onCreateCourseSubmit = async (
   }
   creationPending.value = true
   // upload PPTX file
-  useFileGo(selected_file.value[0]).then((url) => {
+  useFileGo(selected_file.value[0], 'ppt').then((url) => {
     useFetchWrapped<
       req.gen.CourseGenCreate & AuthedRequest,
       BaseResponse<resp.gen.CourseGenCreate>