feat(ticket): split overview/class detail queries and add loading skeletons

src/app/globals.css

@@ -122,6 +122,20 @@
 }
 
 @layer base {
+  html {
+    scrollbar-gutter: stable;
+  }
+
+  html:has(body[data-scroll-locked]) {
+    scrollbar-gutter: auto;
+  }
+
+  @supports not (scrollbar-gutter: stable) {
+    html {
+      overflow-y: scroll;
+    }
+  }
+
   * {
     @apply border-border outline-none;
   }