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/system/assets/ui/less/datepicker.date.less

@@ -0,0 +1,168 @@
+//
+// Date Picker
+// --------------------------------------------------
+
+.pika-single {
+    display: block;
+    position: relative;
+    width: 240px;
+    padding: 8px;
+    color: #333;
+    background: #fff;
+
+    &.is-hidden {
+        display: none;
+    }
+    &.is-bound {
+        position: absolute;
+        box-shadow: 0 5px 15px -5px rgba(0,0,0,.5);
+    }
+}
+
+.pika-title, .pika-footer {
+    position: relative;
+    text-align: center;
+}
+
+.pika-footer {
+    margin: 5px auto 0;
+}
+
+.pika-label {
+    display: inline-block;
+    *display: inline;
+    position: relative;
+    z-index: @zindex-datepicker;
+    overflow: hidden;
+    margin: 0;
+    padding: 5px 3px;
+    font-size: 14px;
+    line-height: 20px;
+    font-weight: bold;
+    background-color: #fff;
+}
+
+.pika-footer, .pika-title {
+    select {
+        cursor: pointer;
+        position: absolute;
+        z-index: @zindex-datepicker - 1;
+        margin: 0;
+        left: 0;
+        top: 5px;
+        opacity: 0;
+    }
+}
+
+.pika-prev,
+.pika-next {
+    display: block;
+    cursor: pointer;
+    position: relative;
+    outline: none;
+    border: 0;
+    padding: 0;
+    width: 20px;
+    height: 30px;
+    background-color: transparent;
+    background-position: center center;
+    background-repeat: no-repeat;
+    background-size: 75% 75%;
+    white-space: nowrap;
+    text-indent: 100%;
+    overflow: hidden;
+    opacity: .5;
+    *position: absolute;
+    *top: 0;
+
+    &:hover {
+        opacity: 1;
+    }
+}
+
+
+.pika-prev,
+.is-rtl .pika-next {
+    float: left;
+    background-image: url('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAAeCAYAAAAsEj5rAAAAUklEQVR42u3VMQoAIBADQf8Pgj+OD9hG2CtONJB2ymQkKe0HbwAP0xucDiQWARITIDEBEnMgMQ8S8+AqBIl6kKgHiXqQqAeJepBo/z38J/U0uAHlaBkBl9I4GwAAAABJRU5ErkJggg==');
+    *left: 0;
+}
+
+.pika-next,
+.is-rtl .pika-prev {
+    float: right;
+    background-image: url('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAAeCAYAAAAsEj5rAAAAU0lEQVR42u3VOwoAMAgE0dwfAnNjU26bYkBCFGwfiL9VVWoO+BJ4Gf3gtsEKKoFBNTCoCAYVwaAiGNQGMUHMkjGbgjk2mIONuXo0nC8XnCf1JXgArVIZAQh5TKYAAAAASUVORK5CYII=');
+    *right: 0;
+}
+
+.pika-prev.is-disabled,
+.pika-next.is-disabled {
+    cursor: default;
+    opacity: .2;
+}
+
+.pika-select {
+    display: inline-block;
+    *display: inline;
+}
+
+.pika-table {
+    width: 100%;
+    border-collapse: collapse;
+    border-spacing: 0;
+    border: 0;
+
+    th, td {
+        width: 14.285714285714286%;
+    }
+
+    th {
+        color: #999;
+        font-size: 12px;
+        line-height: 25px;
+        font-weight: bold;
+        text-align: center;
+    }
+}
+
+.pika-button {
+    cursor: pointer;
+    display: block;
+    outline: none;
+    border: 0;
+    margin: 0;
+    width: 100%;
+    padding: 5px;
+    color: #666;
+    font-size: 12px;
+    line-height: 15px;
+    text-align: right;
+    background: #f5f5f5;
+}
+
+.is-today .pika-button {
+    color: #33aaff;
+    font-weight: bold;
+}
+
+.is-selected .pika-button {
+    color: #fff;
+    font-weight: bold;
+    background: #33aaff;
+    box-shadow: inset 0 1px 3px #178fe5;
+    border-radius: 3px;
+}
+
+.is-disabled .pika-button {
+    pointer-events: none;
+    cursor: default;
+    color: #999;
+    opacity: .3;
+}
+
+.pika-button:hover {
+    color: #fff !important;
+    background: #ff8000 !important;
+    box-shadow: none !important;
+    border-radius: 3px !important;
+}