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/system/controllers/MailBrandSettings.php

@@ -0,0 +1,115 @@
+<?php namespace System\Controllers;
+
+use Lang;
+use File;
+use Flash;
+use Config;
+use Redirect;
+use BackendMenu;
+use System\Models\MailBrandSetting;
+use System\Classes\SettingsManager;
+use System\Classes\MailManager;
+use Backend\Classes\Controller;
+use System\Models\MailLayout;
+use System\Models\MailTemplate;
+
+/**
+ * Mail brand customization controller
+ *
+ * @package winter\wn-backend-module
+ * @author Alexey Bobkov, Samuel Georges
+ *
+ */
+class MailBrandSettings extends Controller
+{
+    /**
+     * @var array Extensions implemented by this controller.
+     */
+    public $implement = [
+        \Backend\Behaviors\FormController::class,
+    ];
+
+    /**
+     * @var array Permissions required to view this page.
+     */
+    public $requiredPermissions = ['system.manage_mail_templates'];
+
+    /**
+     * @var string HTML body tag class
+     */
+    public $bodyClass = 'compact-container';
+
+    /**
+     * Constructor.
+     */
+    public function __construct()
+    {
+        parent::__construct();
+
+        $this->pageTitle = 'system::lang.mail_brand.page_title';
+
+        BackendMenu::setContext('Winter.System', 'system', 'settings');
+        SettingsManager::setContext('Winter.System', 'mail_brand_settings');
+    }
+
+    public function index()
+    {
+        $this->addJs('/modules/system/assets/js/mailbrandsettings/mailbrandsettings.js', 'core');
+
+        $setting = MailBrandSetting::instance();
+
+        $setting->resetCache();
+
+        return $this->create();
+    }
+
+    public function index_onSave()
+    {
+        $setting = MailBrandSetting::instance();
+
+        return $this->create_onSave();
+    }
+
+    public function index_onResetDefault()
+    {
+        $setting = MailBrandSetting::instance();
+
+        $setting->resetDefault();
+
+        Flash::success(Lang::get('backend::lang.form.reset_success'));
+
+        return Redirect::refresh();
+    }
+
+    public function onUpdateSampleMessage()
+    {
+        $this->pageAction();
+
+        $this->formGetWidget()->setFormValues();
+
+        return ['previewHtml' => $this->renderSampleMessage()];
+    }
+
+    public function renderSampleMessage()
+    {
+        $data = [
+            'subject' => Config::get('app.name'),
+            'appName' => Config::get('app.name'),
+            'texts' => Lang::get('system::lang.mail_brand.sample_template')
+        ];
+
+        $layout = new MailLayout;
+        $layout->fillFromCode('default');
+
+        $template = new MailTemplate;
+        $template->layout = $layout;
+        $template->content_html = File::get(base_path('modules/system/models/mailbrandsetting/sample_template.php'));
+
+        return MailManager::instance()->renderTemplate($template, $data);
+    }
+
+    public function formCreateModelObject()
+    {
+        return MailBrandSetting::instance();
+    }
+}