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/behaviors/importexportcontroller/views/export.php

@@ -0,0 +1,24 @@
+<?php Block::put('breadcrumb') ?>
+    <?= $this->makeLayoutPartial('breadcrumb') ?>
+<?php Block::endPut() ?>
+
+<?= Form::open(['class' => 'layout']) ?>
+
+    <div class="layout-row">
+        <?= $this->exportRender() ?>
+    </div>
+
+    <div class="form-buttons">
+        <div class="loading-indicator-container">
+            <button
+                type="submit"
+                data-control="popup"
+                data-handler="onExportLoadForm"
+                data-keyboard="false"
+                class="btn btn-primary">
+                <?= e(trans('backend::lang.import_export.export')) ?>
+            </button>
+        </div>
+    </div>
+
+<?= Form::close() ?>

modules/backend/behaviors/importexportcontroller/views/import.php

@@ -0,0 +1,24 @@
+<?php Block::put('breadcrumb') ?>
+    <?= $this->makeLayoutPartial('breadcrumb') ?>
+<?php Block::endPut() ?>
+
+<?= Form::open(['class' => 'layout']) ?>
+
+    <div class="layout-row">
+        <?= $this->importRender() ?>
+    </div>
+
+    <div class="form-buttons">
+        <div class="loading-indicator-container">
+            <button
+                type="submit"
+                data-control="popup"
+                data-handler="onImportLoadForm"
+                data-keyboard="false"
+                class="btn btn-primary">
+                <?= e(trans('backend::lang.import_export.import')) ?>
+            </button>
+        </div>
+    </div>
+
+<?= Form::close() ?>