Add homework review workflow: statuses, audio, file attachments, tabs

- HomeworkSubmission: add status (PENDING/REVIEWING/APPROVED/REJECTED) + statusAt
- HomeworkFeedback: add files (Json) + audioUrl fields
- Curator detail page: meta table, content tabs, feedback history with audio/files
- FeedbackForm: file upload, audio recorder (Web Audio API + S3), action buttons
- AudioRecorder component: record → preview → upload to S3
- ContentTabs: toggle between homework description and lesson content (TipTap read-only)
- Homework list: 4-color status badges with proper filtering
- API routes: /api/curator/upload and /api/curator/audio-upload

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

src/app/curator/homework/[submissionId]/actions.ts

@@ -6,17 +6,43 @@ import { headers } from "next/headers";
 import { revalidatePath } from "next/cache";
 import { sendFeedbackReceivedEmail } from "@/lib/email";
 
-export async function submitFeedback(submissionId: string, text: string) {
+async function requireCurator() {
   const session = await auth.api.getSession({ headers: await headers() });
   if (!session || (session.user.role !== "curator" && session.user.role !== "admin")) {
     throw new Error("Forbidden");
   }
+  return session;
+}
 
-  await prisma.homeworkFeedback.create({
-    data: { submissionId, curatorId: session.user.id, text },
-  });
+export async function submitFeedback(
+  submissionId: string,
+  data: {
+    text: string;
+    files?: { name: string; url: string; size: number }[];
+    audioUrl?: string | null;
+    action: "approve" | "reject";
+  }
+) {
+  const session = await requireCurator();
+  const status = data.action === "approve" ? "APPROVED" : "REJECTED";
 
-  // Send email to student
+  await prisma.$transaction([
+    prisma.homeworkFeedback.create({
+      data: {
+        submissionId,
+        curatorId: session.user.id,
+        text: data.text,
+        files: data.files ?? [],
+        audioUrl: data.audioUrl ?? null,
+      },
+    }),
+    prisma.homeworkSubmission.update({
+      where: { id: submissionId },
+      data: { status, statusAt: new Date() },
+    }),
+  ]);
+
+  // Send email notification to student
   const submission = await prisma.homeworkSubmission.findUnique({
     where: { id: submissionId },
     include: {
@@ -26,6 +52,7 @@ export async function submitFeedback(submissionId: string, text: string) {
           lesson: {
             select: {
               title: true,
+              id: true,
               module: { select: { course: { select: { slug: true } } } },
             },
           },
@@ -36,12 +63,12 @@ export async function submitFeedback(submissionId: string, text: string) {
 
   if (submission) {
     const { lesson } = submission.homework;
-    const lessonUrl = `${process.env.BETTER_AUTH_URL ?? "https://school.second-brain.ru"}/courses/${lesson.module.course.slug}/lessons/${submission.homework.lessonId}`;
+    const lessonUrl = `${process.env.BETTER_AUTH_URL ?? "https://school.second-brain.ru"}/courses/${lesson.module.course.slug}/lessons/${lesson.id}`;
     await sendFeedbackReceivedEmail(
       submission.user.email,
       submission.user.name,
       lesson.title,
-      text,
+      data.text,
       lessonUrl
     );
   }
@@ -49,3 +76,19 @@ export async function submitFeedback(submissionId: string, text: string) {
   revalidatePath("/curator/homework");
   revalidatePath(`/curator/homework/${submissionId}`);
 }
+
+export async function setReviewing(submissionId: string) {
+  await requireCurator();
+  await prisma.homeworkSubmission.update({
+    where: { id: submissionId },
+    data: { status: "REVIEWING", statusAt: new Date() },
+  });
+  revalidatePath("/curator/homework");
+  revalidatePath(`/curator/homework/${submissionId}`);
+}
+
+export async function deleteSubmission(submissionId: string) {
+  await requireCurator();
+  await prisma.homeworkSubmission.delete({ where: { id: submissionId } });
+  revalidatePath("/curator/homework");
+}