Send homework-updated email to staff on submission edit

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

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

@@ -4,7 +4,7 @@ import { prisma } from "@/lib/prisma";
 import { auth } from "@/lib/auth";
 import { headers } from "next/headers";
 import { revalidatePath } from "next/cache";
-import { sendHomeworkSubmittedEmail } from "@/lib/email";
+import { sendHomeworkSubmittedEmail, sendHomeworkUpdatedEmail } from "@/lib/email";
 
 interface HomeworkFile {
   name: string;
@@ -40,6 +40,27 @@ export async function submitHomework(
       data: { text, files: files as object[], audioUrl: audioUrl ?? null, submittedAt: new Date() },
     });
     submissionId = updated.id;
+
+    // Notify admins/curators when student edits an existing submission
+    const [lessonRecord, staff] = await Promise.all([
+      prisma.homework.findUnique({
+        where: { id: homeworkId },
+        include: { lesson: { select: { title: true } } },
+      }),
+      prisma.user.findMany({
+        where: { role: { in: ["admin", "curator"] } },
+        select: { email: true, name: true },
+      }),
+    ]);
+    if (lessonRecord) {
+      await Promise.all(
+        staff.map((s) =>
+          sendHomeworkUpdatedEmail(s.email, s.name, session.user.name, lessonRecord.lesson.title, submissionId).catch(
+            (e) => console.error("[email] homework-updated:", e)
+          )
+        )
+      );
+    }
   } else {
     const created = await prisma.homeworkSubmission.create({
       data: { homeworkId, userId: session.user.id, text, files: files as object[], audioUrl: audioUrl ?? null },