chore: update ENV.md for NextAuth URL configuration, remove debug logging from middleware, and adjust session token handling in auth middleware

src/lib/auth.ts

@@ -57,19 +57,7 @@ export const { handlers, auth, signIn, signOut } = NextAuth({
   session: {
     strategy: "jwt",
   },
-  cookies: {
-    sessionToken: {
-      name: process.env.NODE_ENV === "production" 
-        ? `__Secure-next-auth.session-token`
-        : `next-auth.session-token`,
-      options: {
-        httpOnly: true,
-        sameSite: "lax",
-        path: "/",
-        secure: process.env.NODE_ENV === "production",
-      },
-    },
-  },
   secret: process.env.NEXTAUTH_SECRET,
   trustHost: true,
+  // useSecureCookies sera automatiquement détecté via NEXTAUTH_URL
 });