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/traits/SearchableWidget.php

@@ -0,0 +1,43 @@
+<?php namespace Backend\Traits;
+
+use Str;
+
+/**
+ * Searchable Widget Trait
+ * Adds search features to back-end widgets
+ *
+ * @package winter\wn-backend-module
+ * @author Alexey Bobkov, Samuel Georges
+ */
+
+trait SearchableWidget
+{
+    protected $searchTerm = false;
+
+    protected function getSearchTerm()
+    {
+        return $this->searchTerm !== false ? $this->searchTerm : $this->getSession('search');
+    }
+
+    protected function setSearchTerm($term)
+    {
+        $this->searchTerm = trim($term);
+        $this->putSession('search', $this->searchTerm);
+    }
+
+    protected function textMatchesSearch(&$words, $text)
+    {
+        foreach ($words as $word) {
+            $word = trim($word);
+            if (!strlen($word)) {
+                continue;
+            }
+
+            if (Str::contains(Str::lower($text), $word)) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+}