Fix collapse, group skew, empty tables and the tab strip scrollbar

plugins/computers/frontend/views/PCDetail.vue

@@ -603,11 +603,6 @@ async function confirmRetire() {
 </script>
 
 <style scoped>
-/* Software and Activity are single long lists, so they use the full page width
-   rather than .content-grid's two balanced columns. Cards inside still need
-   their own vertical rhythm, which the column flow was providing. */
-.detail-full { display: flex; flex-direction: column; gap: 1rem; }
-.detail-full > * { min-width: 0; }
 
 /* PC-specific styles - shared styles are in global style.css */