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/_update_form.php

@@ -0,0 +1,37 @@
+<div id="checkUpdatesPopup">
+    <?= Form::open(['id' => 'updateForm']) ?>
+        <div class="modal-header">
+            <button type="button" class="close" data-dismiss="popup">&times;</button>
+            <h4 class="modal-title"><?= e(trans('system::lang.updates.name')) ?></h4>
+        </div>
+
+        <div id="updateContainer">
+            <div class="modal-body">
+
+                <div class="loading-indicator-container">
+                    <p>&nbsp;</p>
+                    <div class="loading-indicator transparent">
+                        <div><?= e(trans('system::lang.updates.update_loading')) ?></div>
+                        <span></span>
+                    </div>
+                </div>
+
+            </div>
+            <div class="modal-footer">
+                <button
+                    type="button"
+                    class="btn btn-default"
+                    data-dismiss="popup">
+                    <?= e(trans('backend::lang.form.cancel')) ?>
+                </button>
+            </div>
+        </div>
+
+    <?= Form::close() ?>
+</div>
+
+<script>
+    $('#checkUpdatesPopup').on('popupComplete', function() {
+        $.wn.updateProcess.check()
+    })
+</script>