Refactor code structure for improved readability and maintainability

auth/login.php

@@ -20,6 +20,10 @@ if ($currentUser) {
 }
 
 $error = null;
+$infoMessage = null;
+if (isset($_GET['expired'])) {
+    $infoMessage = "Uw dagsessie is om 23:59 beëindigd. Log opnieuw in om een nieuwe werkdag te starten.";
+}
 $step = isset($_SESSION['pending_2fa_user_id']) ? 2 : 1;
 
 // Terug naar stap 1
@@ -95,14 +99,16 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
             }
 
             if ($isValid) {
-                // Volledige login succesvol
+                // Volledige login succesvol (geldig tot 23:59:59 van vandaag)
                 $_SESSION['user_id'] = $user['id'];
                 $_SESSION['user_name'] = $user['name'];
                 $_SESSION['user_email'] = $user['email'];
                 $_SESSION['user_role'] = $user['role'];
                 $_SESSION['is_2fa_verified'] = true;
+                $_SESSION['auth_date'] = date('Y-m-d');
+                $_SESSION['session_expires_at'] = strtotime('today 23:59:59');
 
-                // Activeer persistente remember token (30 dagen blijf ingelogd)
+                // Activeer dagspecifieke remember token (verloopt vannacht om 23:59:59)
                 issue_remember_token((int)$user['id']);
 
                 unset($_SESSION['pending_2fa_user_id'], $_SESSION['pending_2fa_user_email'], $_SESSION['pending_2fa_user_name']);
@@ -178,6 +184,13 @@ $pageTitle = "Fociz — Inloggen";
         </p>
     </div>
 
+    <?php if ($infoMessage): ?>
+        <div class="mb-6 p-4 rounded-2xl bg-sky-500/10 border border-sky-500/30 flex items-start space-x-3 text-sky-800 dark:text-sky-300 text-xs sm:text-sm">
+            <i data-lucide="info" class="w-5 h-5 flex-shrink-0 mt-0.5 text-sky-600 dark:text-sky-400"></i>
+            <span><?= htmlspecialchars($infoMessage) ?></span>
+        </div>
+    <?php endif; ?>
+
     <?php if ($error): ?>
         <div class="mb-6 p-4 rounded-2xl bg-red-500/10 border border-red-500/30 flex items-start space-x-3 text-red-700 dark:text-red-400 text-sm">
             <i data-lucide="alert-triangle" class="w-5 h-5 flex-shrink-0 mt-0.5"></i>