refactor(webui): use core access explanation

webui/src/api/files.ts

@@ -1,4 +1,10 @@
 import { ApiError, apiFetch, apiUrl, authHeaders, csrfToken, type ApiSettings, type DeltaDeletedItem, type FilesManagedFileLinkTarget } from "@govoplan/core-webui";
+export { fetchResourceAccessExplanation } from "@govoplan/core-webui";
+export type {
+  AccessDecisionProvenanceItem,
+  ResourceAccessExplanationUser as AccessExplanationUser,
+  ResourceAccessExplanationResponse
+} from "@govoplan/core-webui";
 
 export type FileSpace = {
   id: string;
@@ -559,44 +565,6 @@ export function bulkDeleteFiles(settings: ApiSettings, fileIds: string[]): Promi
 
 export type FileBulkShareResponse = {shares: FileShare[];shared_count: number;};
 
-export type AccessExplanationUser = {
-  id: string;
-  account_id?: string | null;
-  email?: string | null;
-  display_name?: string | null;
-};
-
-export type AccessDecisionProvenanceItem = {
-  kind: string;
-  id?: string | null;
-  label?: string | null;
-  tenant_id?: string | null;
-  source?: string | null;
-  details?: Record<string, unknown>;
-};
-
-export type ResourceAccessExplanationResponse = {
-  user: AccessExplanationUser;
-  resource_type: string;
-  resource_id: string;
-  action: string;
-  provenance: AccessDecisionProvenanceItem[];
-};
-
-export function fetchResourceAccessExplanation(
-settings: ApiSettings,
-options: {userId: string;resourceType: string;resourceId: string;action: string;tenantId?: string | null;})
-: Promise<ResourceAccessExplanationResponse> {
-  const params = new URLSearchParams({
-    user_id: options.userId,
-    resource_type: options.resourceType,
-    resource_id: options.resourceId,
-    action: options.action
-  });
-  if (options.tenantId) params.set("tenant_id", options.tenantId);
-  return apiFetch<ResourceAccessExplanationResponse>(settings, `/api/v1/admin/access/resource-explanation?${params.toString()}`);
-}
-
 export function virtualFolderResourceId(options: {tenantId: string;ownerType: "user" | "group";ownerId: string;path: string;}): string {
   return `virtual-folder:v1:${options.tenantId}:${options.ownerType}:${options.ownerId}:${base64Url(options.path.replace(/\\/g, "/").replace(/^\/+|\/+$/g, ""))}`;
 }