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/winter.mix.js

@@ -0,0 +1,69 @@
+/* eslint-disable */
+const mix = require('laravel-mix');
+require('laravel-mix-polyfill');
+/* eslint-enable */
+
+mix.setPublicPath(__dirname);
+
+mix
+    .options({
+        terser: {
+            extractComments: false,
+        },
+        runtimeChunkPath: './assets/ui/js/build',
+    })
+    .vue({ version: 3 })
+
+    // Extract shared vendor libraries
+    .extract({
+        libraries: [
+            '@vue',
+            'babel-loader',
+            'css-loader',
+            'jquery-events-to-dom-events',
+            'style-loader',
+            'vue',
+            'vue-loader',
+        ],
+        to: './assets/ui/js/build/vendor.js',
+    })
+    .vue({ version: 3 })
+
+    // Compile Snowboard assets for the Backend
+    .js(
+        './assets/ui/js/index.js',
+        './assets/ui/js/build/backend.js',
+    )
+
+    // Compile widgets for Backend
+    .js(
+        './formwidgets/colorpicker/assets/js/src/ColorPicker.js',
+        './formwidgets/colorpicker/assets/js/dist/colorpicker.js',
+    )
+    .js(
+        './formwidgets/iconpicker/assets/js/src/iconpicker.js',
+        './formwidgets/iconpicker/assets/js/dist/iconpicker.js',
+    )
+    .js(
+        './formwidgets/sensitive/assets/js/src/Sensitive.js',
+        './formwidgets/sensitive/assets/js/dist/sensitive.js',
+    )
+
+    // Compile the list widget drag-and-drop reordering bundle (includes SortableJS)
+    .js(
+        './widgets/lists/assets/js/src/winter.list.sortable.js',
+        './widgets/lists/assets/js/dist/winter.list.sortable.js',
+    )
+
+    // Compile pages
+    .js(
+        './assets/ui/js/pages/Preferences.js',
+        './assets/js/preferences/preferences.js',
+    )
+
+    // Polyfill for all targeted browsers
+    .polyfill({
+        enabled: mix.inProduction(),
+        useBuiltIns: 'usage',
+        targets: '> 0.5%, last 2 versions, not dead, Firefox ESR, not ie > 0',
+    });