Sync ticket status to Zammad + prevent closed tickets reopening

- When changing ticket status in intra, now syncs to Zammad too
  (close in intra → close in Zammad, etc.)
- Prevent Zammad sync from reopening locally closed tickets
  unless Zammad has genuinely new activity (updated_at changed)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

api.php

@@ -3661,6 +3661,25 @@ switch ($action) {
                 dbSaveTicket($companyId, $t);
                 $found = true;
                 dbAddLog($companyId, currentUser(), 'ticket_status', $t['id'], $t['subject'], "Tila: {$oldStatus} → {$status}");
+                // Synkkaa tila Zammadiin
+                if (!empty($t['zammad_ticket_id'])) {
+                    $integ = dbGetIntegration($companyId, 'zammad');
+                    if ($integ && $integ['enabled']) {
+                        try {
+                            $reverseStateMap = [
+                                'uusi' => 'new', 'kasittelyssa' => 'open',
+                                'odottaa' => 'pending reminder', 'suljettu' => 'closed',
+                            ];
+                            $zState = $reverseStateMap[$status] ?? null;
+                            if ($zState) {
+                                $z = new ZammadClient($integ['config']['url'], $integ['config']['token']);
+                                $z->updateTicket((int)$t['zammad_ticket_id'], ['state' => $zState]);
+                            }
+                        } catch (\Throwable $e) {
+                            error_log("Zammad status sync failed: " . $e->getMessage());
+                        }
+                    }
+                }
                 echo json_encode($t);
                 break;
             }
@@ -5464,10 +5483,25 @@ switch ($action) {
                 } else {
                     $ticketId = $existing['id'];
                     $zammadUpdated = date('Y-m-d H:i:s', strtotime($zt['updated_at'] ?? 'now'));
+                    // Jos tiketti on suljettu tässä järjestelmässä, älä palauta uudeksi
+                    // PAITSI jos Zammadissa status on oikeasti muuttunut (esim. uusi viesti avasi tiketin)
+                    $localStatus = $existing['status'] ?? '';
+                    $newStatus = $status;
+                    if ($localStatus === 'suljettu' && $status === 'uusi') {
+                        // Tarkista onko Zammadissa oikeasti uutta toimintaa (updated_at muuttunut)
+                        $localUpdated = $existing['updated'] ?? '';
+                        if ($zammadUpdated > $localUpdated) {
+                            // Zammadissa on tapahtunut jotain — avaa uudelleen
+                            $newStatus = 'uusi';
+                        } else {
+                            // Ei muutoksia — pidä suljettuna
+                            $newStatus = 'suljettu';
+                        }
+                    }
                     // Päivitä status/priority/group
                     _dbExecute(
                         "UPDATE tickets SET status = ?, type = ?, priority = ?, subject = ?, zammad_group = ?, updated = ? WHERE id = ?",
-                        [$status, $type, $priority, $zt['title'] ?? '', $group, $zammadUpdated, $ticketId]
+                        [$newStatus, $type, $priority, $zt['title'] ?? '', $group, $zammadUpdated, $ticketId]
                     );
                     $updated++;
                 }