feat(53-mobile-status-panel-toggle): zwijany panel statusow na mobile

Native details/summary toggle — panel zwiniety domyslnie na mobile,
rozwijany kliknieciem. Desktop: zawsze otwarty, bez zmian.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

public/assets/css/app.css

@@ -2106,6 +2106,22 @@ h4.section-title::before {
   font-weight: 700;
   color: #0f172a;
   margin-bottom: 8px;
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  list-style: none;
+}
+.order-statuses-side__title::-webkit-details-marker {
+  display: none;
+}
+.order-statuses-side__arrow {
+  display: none;
+  flex-shrink: 0;
+  opacity: 0.5;
+  transition: transform 0.2s ease;
+}
+details[open] > .order-statuses-side__title .order-statuses-side__arrow {
+  transform: rotate(180deg);
 }
 
 .order-status-group {
@@ -3042,6 +3058,12 @@ body.no-scroll {
     position: static;
     top: auto;
   }
+  .order-statuses-side__title {
+    cursor: pointer;
+  }
+  .order-statuses-side__arrow {
+    display: block;
+  }
   .order-details-actions {
     justify-content: flex-start;
   }