Add user deletion functionality: Implement DELETE API endpoint for user management, allowing admins to remove users while preventing self-deletion. Enhance UserManagement component with delete confirmation and error handling for improved user experience.

app/api/events/[id]/register/route.ts

@@ -1,6 +1,7 @@
 import { NextResponse } from "next/server";
 import { auth } from "@/lib/auth";
 import { prisma } from "@/lib/prisma";
+import { calculateEventStatus } from "@/lib/eventStatus";
 
 export async function POST(
   request: Request,
@@ -30,7 +31,8 @@ export async function POST(
       );
     }
 
-    if (event.status !== "UPCOMING") {
+    const eventStatus = calculateEventStatus(event.date);
+    if (eventStatus !== "UPCOMING") {
       return NextResponse.json(
         { error: "Vous ne pouvez vous inscrire qu'aux événements à venir" },
         { status: 400 }