fix(admin-ui): backlog sweep — 7 review items

ordinis-admin-ui/src/api/queries.ts

@@ -371,11 +371,20 @@ export const useCascadePreview = (dict: string, businessKey: string | undefined)
 /**
  * Free-form ILIKE search across all dictionaries (active records only).
  * Min query length = 3 (backend требует для использования trigram index).
+ *
+ * Min-length guard: throw в queryFn — защищает от prefetch (router loader)
+ * вызовов с q="ab" → backend 400. queryFn enforces invariant; useQuery
+ * `enabled` gating опциональный для UI shortcut, но не source of truth.
  */
+export const SEARCH_MIN_LEN = 3
+
 export const searchQuery = (q: string, size = 100, perDict = 10) =>
   queryOptions({
     queryKey: ['search', q, size, perDict] as const,
     queryFn: async (): Promise<SearchResponse> => {
+      if (q.length < SEARCH_MIN_LEN) {
+        throw new Error(`search query too short (min ${SEARCH_MIN_LEN} chars)`)
+      }
       const { data } = await apiClient.get<SearchResponse>('/search', {
         params: { q, size, perDict },
       })
@@ -387,7 +396,7 @@ export const searchQuery = (q: string, size = 100, perDict = 10) =>
 export const useSearch = (q: string | undefined, size = 100, perDict = 10) =>
   useQuery({
     ...searchQuery(q ?? '', size, perDict),
-    enabled: Boolean(q && q.length >= 3),
+    enabled: Boolean(q && q.length >= SEARCH_MIN_LEN),
   })
 
 // === Approval Workflow v2 ===