fix: simplify middleware, remove broken fetch tracking

middleware.ts

@@ -4,12 +4,8 @@ import type { NextRequest } from 'next/server';
 // Routes only accessible when not authenticated
 const authRoutes = ['/login', '/register'];
 
-// Routes à ne pas tracker
-const excludedPaths = ['/api/track', '/api/metrics', '/_next', '/favicon.ico'];
-
 export function middleware(request: NextRequest) {
   const { pathname } = request.nextUrl;
-  const startTime = Date.now();
 
   // Get token from cookies or headers
   const token = request.cookies.get('auth_token')?.value ||
@@ -18,47 +14,12 @@ export function middleware(request: NextRequest) {
   // Check if route is auth route
   const isAuthRoute = authRoutes.some(route => pathname.startsWith(route));
 
-  // Préparer la réponse
-  let response: NextResponse;
-
   // If accessing auth routes with token in cookies, redirect to home
   if (isAuthRoute && token) {
-    response = NextResponse.redirect(new URL('/', request.url));
-  } else {
-    response = NextResponse.next();
+    return NextResponse.redirect(new URL('/', request.url));
   }
 
-  // Tracker les métriques HTTP (fire and forget)
-  const shouldTrack = !excludedPaths.some(path => pathname.startsWith(path));
-
-  if (shouldTrack) {
-    const durationMs = Date.now() - startTime;
-    const statusCode = response.status || 200;
-
-    // Envoyer les métriques de manière asynchrone (non bloquant)
-    const trackUrl = new URL('/api/track', request.url);
-
-    // Utiliser waitUntil pour ne pas bloquer la réponse
-    // Note: waitUntil n'est pas disponible dans tous les environnements
-    try {
-      fetch(trackUrl.toString(), {
-        method: 'POST',
-        headers: { 'Content-Type': 'application/json' },
-        body: JSON.stringify({
-          method: request.method,
-          path: pathname,
-          statusCode,
-          durationMs,
-        }),
-      }).catch(() => {
-        // Ignorer les erreurs de tracking
-      });
-    } catch {
-      // Ignorer les erreurs de tracking
-    }
-  }
-
-  return response;
+  return NextResponse.next();
 }
 
 export const config = {