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/widgets/mediamanager/partials/_item-list.php

@@ -0,0 +1,17 @@
+<div class="panel no-padding padding-top">
+    <input type="hidden" data-type="current-folder" value="<?= e($currentFolder) ?>"/>
+    <input type="hidden" data-type="search-mode" value="<?= $searchMode ? 'true' : 'false' ?>"/>
+    <div class="list-container">
+        <?php if (count($items) == 0 && $isRootFolder && !$searchMode): ?>
+            <div class="empty-library"><?= e(trans('backend::lang.media.empty_library')) ?></div>
+        <?php endif ?>
+
+        <?php if ($viewMode == Backend\Widgets\MediaManager::VIEW_MODE_GRID): ?>
+            <?= $this->makePartial('list-grid') ?>
+        <?php elseif ($viewMode == Backend\Widgets\MediaManager::VIEW_MODE_LIST): ?>
+            <?= $this->makePartial('list-list') ?>
+        <?php else: ?>
+            <?= $this->makePartial('list-tiles') ?>
+        <?php endif ?>
+    </div>
+</div>