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/SessionMaker.php

@@ -0,0 +1,91 @@
+<?php
+
+namespace Backend\Traits;
+
+use Illuminate\Support\Facades\Session;
+use Winter\Storm\Support\Str;
+
+/**
+ * Session Maker Trait
+ *
+ * Adds session management based methods to a controller class, or a class
+ * that contains a `$controller` property referencing a controller.
+ *
+ * @package winter\wn-backend-module
+ * @author Alexey Bobkov, Samuel Georges
+ */
+trait SessionMaker
+{
+    /**
+     * Saves a widget related key/value pair in to session data.
+     * @param string $key Unique key for the data store.
+     * @param mixed $value The value to store.
+     * @return void
+     */
+    protected function putSession($key, $value)
+    {
+        $sessionId = $this->makeSessionId();
+
+        $currentStore = $this->getSession();
+
+        $currentStore[$key] = $value;
+
+        Session::put($sessionId, base64_encode(serialize($currentStore)));
+    }
+
+    /**
+     * Retrieves a widget related key/value pair from session data.
+     * @param string $key Unique key for the data store.
+     * @param string $default A default value to use when value is not found.
+     * @return string
+     */
+    protected function getSession($key = null, $default = null)
+    {
+        $sessionId = $this->makeSessionId();
+
+        $currentStore = [];
+
+        if (
+            Session::has($sessionId) &&
+            ($cached = @unserialize(@base64_decode(Session::get($sessionId)))) !== false
+        ) {
+            $currentStore = $cached;
+        }
+
+        if ($key === null) {
+            return $currentStore;
+        }
+
+        return $currentStore[$key] ?? $default;
+    }
+
+    /**
+     * Returns a unique session identifier for this widget and controller action.
+     * @return string
+     */
+    protected function makeSessionId()
+    {
+        $controller = property_exists($this, 'controller') && $this->controller
+            ? $this->controller
+            : $this;
+
+        $uniqueId = method_exists($this, 'getId') ? $this->getId() : $controller->getId();
+
+        // Removes Class name and "Controllers" directory
+        $rootNamespace = Str::getClassId(Str::getClassNamespace(Str::getClassNamespace($controller)));
+
+        // The controller action is intentionally omitted, session should be shared for all actions
+        return 'widget.' . $rootNamespace . '-' . class_basename($controller) . '-' . $uniqueId;
+    }
+
+    /**
+     * Resets all session data related to this widget.
+     * @return void
+     */
+    public function resetSession()
+    {
+        $sessionId = $this->makeSessionId();
+
+        Session::forget($sessionId);
+    }
+}