fix: category cache refresh, API 404, redundancy mapping, cost/relation authz, voterToken exposure

- Invalidate categories/features queries after creating/editing tools so new
  categories appear immediately in search, browse dropdown and tool form
- Always refetch categories/features when the combobox/suggestion inputs mount
- Return JSON 404 for unmatched /api routes instead of the SPA index.html
- Read the manually confirmed 'better tool' from the recommendation notes
  instead of using the min tool id in the redundancy dashboard
- Require admin for cost/relation update+delete endpoints
- Stop exposing the voter token in the ratings list response
- Fix parseInt type error on user id params (Express 5 params typing)

artifacts/toolrate/src/components/category-combobox.tsx

@@ -15,7 +15,7 @@ import {
   PopoverContent,
   PopoverTrigger,
 } from "@/components/ui/popover";
-import { useListCategories } from "@workspace/api-client-react";
+import { useListCategories, getListCategoriesQueryKey } from "@workspace/api-client-react";
 
 interface CategoryComboboxProps {
   value: string;
@@ -26,7 +26,13 @@ interface CategoryComboboxProps {
 export function CategoryCombobox({ value, onChange, placeholder = "Select or type a category..." }: CategoryComboboxProps) {
   const [open, setOpen] = useState(false);
   const [inputValue, setInputValue] = useState(value);
-  const categories = useListCategories();
+  const categories = useListCategories({
+    query: {
+      queryKey: getListCategoriesQueryKey(),
+      refetchOnMount: "always",
+      staleTime: 0,
+    },
+  });
 
   const known: string[] = categories.data ?? [];