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/formwidgets/MarkdownEditor.php

@@ -0,0 +1,142 @@
+<?php
+
+namespace Backend\FormWidgets;
+
+use Backend\Classes\FormWidgetBase;
+use Backend\Facades\BackendAuth;
+use Winter\Storm\Support\Facades\Html;
+use Winter\Storm\Support\Facades\Markdown;
+
+/**
+ * Code Editor
+ * Renders a code editor field.
+ *
+ * @package winter\wn-backend-module
+ * @author Alexey Bobkov, Samuel Georges
+ */
+class MarkdownEditor extends FormWidgetBase
+{
+    //
+    // Configurable properties
+    //
+
+    /**
+     * @var string Display mode: split, tab.
+     */
+    public $mode = 'tab';
+
+    /**
+     * @var bool Render preview with safe markdown.
+     */
+    public $safe = false;
+
+    /**
+     * @var bool If true, the editor is set to read-only mode
+     */
+    public $readOnly = false;
+
+    /**
+     * @var bool If true, the editor is set to read-only mode
+     */
+    public $disabled = false;
+
+    //
+    // Object properties
+    //
+
+    /**
+     * {@inheritDoc}
+     */
+    protected $defaultAlias = 'markdown';
+
+    /**
+     * {@inheritDoc}
+     */
+    public function init()
+    {
+        $this->fillFromConfig([
+            'mode',
+            'safe',
+            'readOnly',
+            'disabled',
+        ]);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function render()
+    {
+        $this->prepareVars();
+        return $this->makePartial('markdowneditor');
+    }
+
+    /**
+     * Prepares the widget data
+     */
+    public function prepareVars()
+    {
+        $this->vars['mode'] = $this->mode;
+        $this->vars['stretch'] = $this->formField->stretch;
+        $this->vars['size'] = $this->formField->size;
+        $this->vars['name'] = $this->getFieldName();
+        $this->vars['value'] = $this->getLoadValue();
+        $this->vars['readOnly'] = $this->readOnly;
+        $this->vars['disabled'] = $this->disabled;
+        $this->vars['useMediaManager'] = BackendAuth::getUser()->hasAccess('media.manage_media');
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    protected function loadAssets()
+    {
+        $this->addCss('css/markdowneditor.css', 'core');
+        $this->addJs('js/markdowneditor.js', 'core');
+        $this->addJs('/modules/backend/assets/vendor/ace-codeeditor/build-min.js', 'core');
+    }
+
+    /**
+     * Check to see if the generated HTML should be cleaned to remove any potential XSS
+     *
+     * @return boolean
+     */
+    protected function shouldCleanHtml()
+    {
+        $user = BackendAuth::getUser();
+        return !$user || !$user->hasAccess('backend.allow_unsafe_markdown');
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function getSaveValue($value)
+    {
+        if ($this->shouldCleanHtml()) {
+            $value = Html::clean($value);
+        }
+
+        return $value;
+    }
+
+    /**
+     * AJAX handler to render the markdown as HTML
+     *
+     * @return array ['preview' => $generatedHTML]
+     */
+    public function onRefresh()
+    {
+        $value = post($this->getFieldName());
+        $previewHtml = $this->safe
+            ? Markdown::parseSafe($value)
+            : Markdown::parse($value);
+
+        if ($this->shouldCleanHtml()) {
+            $previewHtml = Html::clean($previewHtml);
+        }
+
+        return [
+            'preview' => $previewHtml
+        ];
+    }
+}