feat(furni-editor): modernize search/list view + live search + server sort

- Restyle to match the editor: slate palette, rounded card, search bar
  with icon + focus ring, teal filter chips, larger furni thumbnails,
  loading skeleton + empty state.
- Live search (350ms debounce) with clear button; filters/sort apply
  immediately.
- Pagination: first/prev/next/last + page-jump input + 'Showing X-Y of Z'
  (was Prev/Next only across 3002 pages).
- Header sort now queries the server (sortField/sortDir) instead of
  reordering only the 20 visible rows; useFurniEditor.searchItems passes
  the sort through.

src/hooks/furni-editor/useFurniEditor.ts

@@ -209,11 +209,11 @@ export const useFurniEditor = () =>
         }
     });
 
-    const searchItems = useCallback((query: string, type: string, pg: number) =>
+    const searchItems = useCallback((query: string, type: string, pg: number, sortField: string = 'id', sortDir: string = 'asc') =>
     {
         setLoading(true);
         setError(null);
-        SendMessageComposer(new FurniEditorSearchComposer(query, type, pg));
+        SendMessageComposer(new FurniEditorSearchComposer(query, type, pg, sortField, sortDir));
     }, []);
 
     const loadDetail = useCallback((id: number) =>