feat: Implement admin dashboard with user management, statistics, and role-based access control.

app/api/admin/users/route.ts

@@ -0,0 +1,34 @@
+import { NextResponse } from 'next/server';
+import { db } from '@/lib/db';
+import { auth } from '@/lib/auth';
+
+export async function GET() {
+    try {
+        const session = await auth();
+        if (!session?.user?.isAdmin) {
+            return new NextResponse('Unauthorized', { status: 403 });
+        }
+
+        const users = await db.user.findMany({
+            orderBy: { createdAt: 'desc' },
+            select: {
+                id: true,
+                name: true,
+                email: true,
+                createdAt: true,
+                _count: {
+                    select: {
+                        ownedWorkspaces: true,
+                        projects: true,
+                        comments: true,
+                    }
+                }
+            }
+        });
+
+        return NextResponse.json({ users });
+    } catch (error) {
+        console.error('[ADMIN_USERS_GET]', error);
+        return new NextResponse('Internal Error', { status: 500 });
+    }
+}