Show last login date on admin user detail page

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

src/app/admin/users/[userId]/page.tsx

@@ -17,6 +17,11 @@ export default async function UserPage({ params }: Props) {
     prisma.user.findUnique({
       where: { id: userId },
       include: {
+        sessions: {
+          orderBy: { createdAt: "desc" },
+          take: 1,
+          select: { createdAt: true },
+        },
         enrollments: {
           include: { course: { select: { id: true, title: true, published: true } } },
           orderBy: { enrolledAt: "desc" },
@@ -64,6 +69,18 @@ export default async function UserPage({ params }: Props) {
             <span className="text-xs" style={{ color: "var(--muted-foreground)" }}>
               с {new Date(user.createdAt).toLocaleDateString("ru-RU")}
             </span>
+            <span className="text-xs" style={{ color: "var(--muted-foreground)" }}>
+              вход:{" "}
+              {user.sessions[0]
+                ? new Date(user.sessions[0].createdAt).toLocaleString("ru-RU", {
+                    day: "2-digit",
+                    month: "2-digit",
+                    year: "numeric",
+                    hour: "2-digit",
+                    minute: "2-digit",
+                  })
+                : "—"}
+            </span>
           </div>
         </div>
         <div style={{ borderTop: "2px solid var(--border)", paddingTop: "1rem" }}>