fix

src/features/student/sessions/pages/StudentSessionDetailsPage.vue

@@ -119,8 +119,6 @@ const { data: session, isLoading } = useStudentSessionQuery(sessionId, {
   enabled: () => !!sessionId.value,
 })
 
-// The homework for this session comes from the dedicated endpoint (the session
-// payload itself doesn't embed homeworks).
 const homeworkFilters = computed(() => ({ sessionId: sessionId.value }))
 const homeworkPagination = ref({ page: 1, perPage: 20 })
 const { data: homeworksData } = useStudentHomeworksListQuery(homeworkFilters, homeworkPagination, {
@@ -152,7 +150,14 @@ const homeworkId = computed(
 )
 
 const uploadHomeworkFile = async (file) => {
-  const fd = objectToFormData({ file, purpose: 'homework_file', context: 'homework' })
+  // The backend validates allowed extensions per `purpose`: `homework_file`
+  // accepts documents/images only, so a recorded voice must go up as `voice`.
+  const isAudio = (file?.type || '').startsWith('audio/')
+  const fd = objectToFormData({
+    file,
+    purpose: isAudio ? 'voice' : 'homework_file',
+    context: 'homework',
+  })
   const response = await uploadMediaMutation.mutateAsync(fd)
   const payload = response?.data ?? response
   return payload?.id ?? null