Make URLs in homework answers and feedback clickable

Apply linkify() to student submission text (curator review page + student
cabinet: reviewed/approved/pending) and to curator feedback text, so pasted
links (e.g. Yandex.Disk) render as clickable anchors.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

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

@@ -1,6 +1,7 @@
 import { prisma } from "@/lib/prisma";
 import { notFound } from "next/navigation";
 import Link from "next/link";
+import { linkify } from "@/lib/linkify";
 import { FeedbackForm } from "./feedback-form";
 import { ContentTabs } from "./content-tabs";
 import { DeleteSubmissionButton } from "./delete-button";
@@ -151,7 +152,7 @@ export default async function SubmissionPage({ params }: Props) {
             className="px-4 py-3 text-sm whitespace-pre-wrap"
             style={{ border: "2px solid var(--border)" }}
           >
-            {submission.text}
+            {linkify(submission.text)}
           </div>
         ) : (
           <p className="text-sm italic" style={{ color: "var(--muted-foreground)" }}>

src/components/student/homework-section.tsx

@@ -3,6 +3,7 @@
 import { useState, useTransition } from "react";
 import { submitHomework } from "@/lib/actions/student-actions";
 import { AudioRecorder } from "@/components/curator/audio-recorder";
+import { linkify } from "@/lib/linkify";
 
 interface HWFile { name: string; url: string; size: number }
 
@@ -99,7 +100,7 @@ export function HomeworkSection({ homework, submission, slug, lessonId, allowAud
           <div className="space-y-2">
             <p className="text-xs font-bold uppercase tracking-widest" style={{ color: "var(--muted-foreground)" }}>Ваш ответ</p>
             <div className="px-4 py-3 text-sm whitespace-pre-wrap opacity-70" style={{ border: "2px solid var(--border)" }}>
-              {submission!.text || "—"}
+              {submission!.text ? linkify(submission!.text) : "—"}
             </div>
             {submission!.audioUrl && (
               <div className="px-4 py-2" style={{ border: "1px solid var(--border)" }}>
@@ -118,7 +119,7 @@ export function HomeworkSection({ homework, submission, slug, lessonId, allowAud
                     {fb.curator.name} · {new Date(fb.createdAt).toLocaleDateString("ru-RU")}
                   </span>
                 </div>
-                <p className="text-sm whitespace-pre-wrap">{fb.text}</p>
+                <p className="text-sm whitespace-pre-wrap">{linkify(fb.text)}</p>
                 {fbFiles.length > 0 && (
                   <div className="space-y-1">
                     {fbFiles.map((f) => (
@@ -155,7 +156,7 @@ export function HomeworkSection({ homework, submission, slug, lessonId, allowAud
           </div>
           {submission.text && (
             <div className="px-4 py-3 text-sm whitespace-pre-wrap opacity-70" style={{ border: "2px solid var(--border)" }}>
-              {submission.text}
+              {linkify(submission.text)}
             </div>
           )}
           {submission.audioUrl && (
@@ -197,7 +198,7 @@ export function HomeworkSection({ homework, submission, slug, lessonId, allowAud
           </div>
           {submission.text && (
             <div className="px-4 py-3 text-sm whitespace-pre-wrap" style={{ border: "2px solid var(--border)" }}>
-              {submission.text}
+              {linkify(submission.text)}
             </div>
           )}
           {submission.audioUrl && (