Add optional audio response for students in homework submissions

- Course: add allowAudio toggle (per-course setting, off by default)
- HomeworkSubmission: add audioUrl field
- Student: AudioRecorder in homework form when allowAudio is enabled
- Student: show audio player in submission view and curator feedback view
- Curator: show student audio on submission detail page
- AudioRecorder: accept uploadUrl prop (reused for student/curator)
- API: /api/student/audio-upload route for S3 upload

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/app/(student)/courses/[slug]/lessons/[lessonId]/homework-actions.ts

@@ -17,7 +17,8 @@ export async function submitHomework(
   slug: string,
   lessonId: string,
   text: string,
-  files: HomeworkFile[]
+  files: HomeworkFile[],
+  audioUrl?: string | null
 ) {
   const session = await auth.api.getSession({ headers: await headers() });
   if (!session) throw new Error("Unauthorized");
@@ -36,12 +37,12 @@ export async function submitHomework(
   if (existing) {
     const updated = await prisma.homeworkSubmission.update({
       where: { id: existing.id },
-      data: { text, files: files as object[], submittedAt: new Date() },
+      data: { text, files: files as object[], audioUrl: audioUrl ?? null, submittedAt: new Date() },
     });
     submissionId = updated.id;
   } else {
     const created = await prisma.homeworkSubmission.create({
-      data: { homeworkId, userId: session.user.id, text, files: files as object[] },
+      data: { homeworkId, userId: session.user.id, text, files: files as object[], audioUrl: audioUrl ?? null },
     });
     submissionId = created.id;
 

src/app/(student)/courses/[slug]/lessons/[lessonId]/page.tsx

@@ -61,7 +61,12 @@ export default async function LessonPage({ params }: Props) {
   const homeworkSubmission = lesson?.homework && session && !isAdmin
     ? await prisma.homeworkSubmission.findFirst({
         where: { homeworkId: lesson.homework.id, userId: session.user.id },
-        include: { feedbacks: { include: { curator: { select: { name: true } } }, orderBy: { createdAt: "desc" } } },
+        include: {
+          feedbacks: {
+            include: { curator: { select: { name: true } } },
+            orderBy: { createdAt: "asc" },
+          },
+        },
       })
     : null;
 
@@ -145,9 +150,16 @@ export default async function LessonPage({ params }: Props) {
             submission={homeworkSubmission ? {
               ...homeworkSubmission,
               files: (homeworkSubmission.files as { name: string; url: string; size: number }[]) ?? [],
+              audioUrl: homeworkSubmission.audioUrl ?? null,
+              feedbacks: homeworkSubmission.feedbacks.map((fb) => ({
+                ...fb,
+                files: (fb.files as { name: string; url: string; size: number }[]) ?? [],
+                audioUrl: fb.audioUrl ?? null,
+              })),
             } : null}
             slug={slug}
             lessonId={lessonId}
+            allowAudio={lesson.module.course.allowAudio}
           />
         </div>
       )}

src/app/admin/courses/actions.ts

@@ -43,12 +43,13 @@ export async function updateCourse(courseId: string, formData: FormData) {
   const slug = formData.get("slug") as string;
   const description = (formData.get("description") as string) || null;
   const published = formData.get("published") === "true";
+  const allowAudio = formData.get("allowAudio") === "true";
   const coverImage = (formData.get("coverImage") as string) || null;
   const categoryId = (formData.get("categoryId") as string) || null;
 
   await prisma.course.update({
     where: { id: courseId },
-    data: { title, slug, description, published, coverImage, categoryId },
+    data: { title, slug, description, published, allowAudio, coverImage, categoryId },
   });
 
   revalidatePath("/admin/courses");

src/app/api/student/audio-upload/route.ts

@@ -0,0 +1,21 @@
+import { NextRequest, NextResponse } from "next/server";
+import { headers } from "next/headers";
+import { auth } from "@/lib/auth";
+import { uploadFile } from "@/lib/s3";
+import { randomUUID } from "crypto";
+
+export async function POST(req: NextRequest) {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session) return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+
+  const form = await req.formData();
+  const file = form.get("file") as File | null;
+  if (!file) return NextResponse.json({ error: "Missing file" }, { status: 400 });
+
+  const ext = file.type.includes("ogg") ? "ogg" : file.type.includes("wav") ? "wav" : "webm";
+  const key = `homework-audio/${session.user.id}/${randomUUID()}.${ext}`;
+  const buffer = Buffer.from(await file.arrayBuffer());
+  const url = await uploadFile(key, buffer, file.type || "audio/webm");
+
+  return NextResponse.json({ url });
+}

src/app/curator/homework/[submissionId]/page.tsx

@@ -160,6 +160,19 @@ export default async function SubmissionPage({ params }: Props) {
         )}
       </div>
 
+      {/* Student audio */}
+      {submission.audioUrl && (
+        <div className="mb-4">
+          <p
+            className="text-xs font-bold uppercase tracking-widest mb-2"
+            style={{ color: "var(--muted-foreground)" }}
+          >
+            Аудио студента
+          </p>
+          <audio controls src={submission.audioUrl} style={{ width: "100%", height: 40 }} />
+        </div>
+      )}
+
       {/* Student files */}
       {files.length > 0 && (
         <div className="mb-6">