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/tests/helpers/BackendHelperTest.php

@@ -0,0 +1,28 @@
+<?php
+
+namespace Backend\Tests\Helpers;
+
+use System\Tests\Bootstrap\TestCase;
+use Backend\Helpers\Backend;
+use Backend\Helpers\Exception\DecompileException;
+
+class BackendHelperTest extends TestCase
+{
+    public function testDecompileAssets()
+    {
+        $backendHelper = new Backend;
+        $assets = $backendHelper->decompileAsset('modules/backend/tests/fixtures/assets/compilation.js');
+
+        $this->assertCount(2, $assets);
+        $this->assertStringContainsString('file1.js', $assets[0]);
+        $this->assertStringContainsString('file2.js', $assets[1]);
+    }
+
+    public function testDecompileMissingFile()
+    {
+        $this->expectException(DecompileException::class);
+
+        $backendHelper = new Backend;
+        $assets = $backendHelper->decompileAsset('modules/backend/tests/fixtures/assets/missing.js');
+    }
+}