fix(css): remove duplicate .results-layout that broke 3-column grid

The old 3-column layout block (referencing .left-sidebar/.right-sidebar
classes that don't exist in the HTML) was overriding the correct layout
defined earlier. Removed the stale duplicate.

internal/views/static/css/kafka.css

@@ -1130,50 +1130,6 @@ a:focus-visible {
   background: var(--border-focus);
 }
 
-/* ============================================================
-   Three-Column Results Layout
-   ============================================================ */
-
-.results-layout {
-  display: grid;
-  grid-template-columns: 200px 1fr 240px;
-  gap: 2rem;
-  align-items: start;
-}
-
-.results-layout .left-sidebar,
-.results-layout .right-sidebar {
-  position: sticky;
-  top: calc(var(--header-height) + 1.5rem);
-  max-height: calc(100vh - var(--header-height) - 3rem);
-  overflow-y: auto;
-}
-
-.results-layout .results-column {
-  min-width: 0;
-}
-
-/* Tablet: hide left sidebar, two columns */
-@media (min-width: 769px) and (max-width: 1024px) {
-  .results-layout {
-    grid-template-columns: 1fr 220px;
-  }
-  .results-layout .left-sidebar {
-    display: none;
-  }
-}
-
-/* Mobile: single column, no sidebars */
-@media (max-width: 768px) {
-  .results-layout {
-    grid-template-columns: 1fr;
-  }
-  .results-layout .left-sidebar,
-  .results-layout .right-sidebar {
-    display: none;
-  }
-}
-
 /* ============================================================
    Preferences Page Layout
    ============================================================ */