Add import/export and update system

Implement CSV/JSON import and export for domains, notification groups and tags (with masking for sensitive channel data), including size/format validation, in-memory CSV building, and logging. Add tag transfer and bulk transfer actions (admin-only). Introduce a new update system: Add UpdateController and UpdateService, migration 025_add_update_system_v1.1.3.sql, and installer changes to include the new migration and version handling; provide endpoints to check, apply, rollback and configure updates. Update helpers and UI bits: add getUpdateBadgeInfo in LayoutHelper, update notification icons/redirects, and add getMaxUploadSize in ViewHelper. Misc: add NotificationGroup::findByName, tweak .gitignore backups path, and update related views and routes.

app/Controllers/SettingsController.php

@@ -28,6 +28,7 @@ class SettingsController extends Controller
         $captchaSettings = $this->settingModel->getCaptchaSettings();
         $twoFactorSettings = $this->settingModel->getTwoFactorSettings();
         $isolationSettings = $this->getIsolationSettings();
+        $updateSettings = $this->settingModel->getUpdateSettings();
         
         // Predefined notification day options
         $notificationPresets = [
@@ -76,6 +77,7 @@ class SettingsController extends Controller
             'captchaSettings' => $captchaSettings,
             'twoFactorSettings' => $twoFactorSettings,
             'isolationSettings' => $isolationSettings,
+            'updateSettings' => $updateSettings,
             'notificationPresets' => $notificationPresets,
             'checkIntervalPresets' => $checkIntervalPresets,
             'statusTriggers' => $statusTriggers,