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/updates/_is_unfrozen.php

@@ -0,0 +1,20 @@
+<?php $action = $record->is_frozen ? 'unfreeze' : 'freeze'; ?>
+<label class="custom-switch" data-check="wn-freeze-<?= $record->id ?>" style="margin-bottom:0">
+    <input data-request="onBulkAction"
+        data-request-data="action: '<?= $action ?>', checked: [<?= $record->id ?>]"
+        data-request-update="list_manage_toolbar: '#plugin-toolbar'"
+        type="checkbox"
+        name="freeze_<?= $record->id ?>"
+        value="<?= !$record->is_frozen ?>"
+        <?php if (!$record->is_frozen): ?>
+            checked="checked"
+        <?php endif; ?>
+        data-stripe-load-indicator
+    >
+
+    <span>
+        <span><?= e(trans('system::lang.plugins.check_yes')) ?></span>
+        <span><?= e(trans('system::lang.plugins.check_no')) ?></span>
+    </span>
+    <a class="slide-button"></a>
+</label>