feat: VivesPOS landing on Winter CMS 1.2 — theme + plugin + Dockerfile

- Base: wintercms/winter branch 1.2 (full framework)
- Theme vivespos: Canvas 7 + Bootstrap 5 CDN, custom CSS
- Layout: deferred GTM/GA4 tracking, JSON-LD SoftwareApplication
- Partials: hero (offline-first), features, modes (offline/nube toggle),
  screenshots, pricing (3 planes), comparison, FAQ, CTA
- Plugin VivesPOS.Site with ContactForm
- Dockerfile: PHP 8.2 Apache, port 80, healthcheck
- Added winter/wn-pages, blog, sitemap, seo plugins
- Active theme set to vivespos

modules/backend/controllers/Preferences.php

@@ -0,0 +1,79 @@
+<?php namespace Backend\Controllers;
+
+use Backend\Classes\Controller;
+use Backend\Facades\Backend;
+use Backend\Facades\BackendMenu;
+use Backend\Models\Preference as PreferenceModel;
+use Illuminate\Support\Facades\Lang;
+use System\Classes\SettingsManager;
+use Winter\Storm\Exception\ApplicationException;
+use Winter\Storm\Support\Facades\File;
+use Winter\Storm\Support\Facades\Flash;
+
+/**
+ * Editor Settings controller
+ *
+ * @package winter\wn-backend-module
+ * @author Alexey Bobkov, Samuel Georges
+ *
+ */
+class Preferences extends Controller
+{
+    public $implement = [
+        \Backend\Behaviors\FormController::class,
+    ];
+
+    /**
+     * @var array Permissions required to view this page.
+     */
+    public $requiredPermissions = ['backend.manage_preferences'];
+
+    /**
+     * Constructor.
+     */
+    public function __construct()
+    {
+        parent::__construct();
+
+        $this->addJs('/modules/backend/assets/js/preferences/preferences.js', 'core');
+
+        BackendMenu::setContext('Winter.System', 'system', 'mysettings');
+        SettingsManager::setContext('Winter.Backend', 'preferences');
+    }
+
+    public function index()
+    {
+        $this->pageTitle = 'backend::lang.backend_preferences.menu_label';
+        $this->asExtension('FormController')->update();
+    }
+
+    /**
+     * Remove the code editor tab if there is no permission.
+     */
+    public function formExtendFields($form)
+    {
+        if (!$this->user->hasAccess('backend.manage_own_editor')) {
+            $form->removeTab('backend::lang.backend_preferences.code_editor');
+        }
+    }
+
+    public function index_onSave()
+    {
+        return $this->asExtension('FormController')->update_onSave();
+    }
+
+    public function index_onResetDefault()
+    {
+        $model = $this->formFindModelObject();
+        $model->resetDefault();
+
+        Flash::success(Lang::get('backend::lang.form.reset_success'));
+
+        return Backend::redirect('backend/preferences');
+    }
+
+    public function formFindModelObject()
+    {
+        return PreferenceModel::instance();
+    }
+}