feat(ui) : add item counters to machine section titles

frontend/app/components/ComponentItem.vue

@@ -14,7 +14,14 @@
     />
 
     <!-- Component Header -->
-    <div class="flex items-center gap-3 p-3 rounded-lg cursor-pointer" :class="component.pendingEntity ? 'bg-error/10 border border-error' : 'bg-base-200'" @click="toggleCollapse">
+    <div
+      class="flex items-center gap-3 p-3 rounded-lg cursor-pointer transition-shadow"
+      :class="[
+        component.pendingEntity ? 'bg-error/10 border border-error' : 'bg-base-200',
+        !isCollapsed ? 'sticky top-16 z-10 shadow-sm' : '',
+      ]"
+      @click="toggleCollapse"
+    >
       <IconLucideChevronRight
         class="w-4 h-4 shrink-0 transition-transform text-base-content/50"
         :class="{ 'rotate-90': !isCollapsed }"