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/fileupload/partials/_fileupload.php

@@ -0,0 +1,37 @@
+<?php if ($this->previewMode && !$fileList->count()): ?>
+
+    <span class="form-control"><?= e(trans('backend::lang.form.preview_no_files_message')) ?></span>
+
+<?php else: ?>
+
+    <?php switch ($displayMode) {
+        case 'image-single':
+            echo $this->makePartial('image_single');
+            break;
+
+        case 'image-multi':
+            echo $this->makePartial('image_multi');
+            break;
+
+        case 'file-single':
+            echo $this->makePartial('file_single');
+            break;
+
+        case 'file-multi':
+            echo $this->makePartial('file_multi');
+            break;
+    } ?>
+
+    <!-- Error template -->
+    <script type="text/template" id="<?= $this->getId('errorTemplate') ?>">
+        <div class="popover-head">
+            <h3><?= e(trans('backend::lang.fileupload.upload_error')) ?></h3>
+            <p>{{errorMsg}}</p>
+            <button type="button" class="close" data-dismiss="popover" aria-hidden="true">&times;</button>
+        </div>
+        <div class="popover-body">
+            <button class="btn btn-secondary" data-remove-file><?= e(trans('backend::lang.fileupload.remove_file')) ?></button>
+        </div>
+    </script>
+
+<?php endif ?>