diff --git a/package.json b/package.json
index 18136d8..f9b396f 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,7 @@
     "LICENSE"
   ],
   "peerDependencies": {
-    "@govoplan/core-webui": "^0.1.8",
+    "@govoplan/core-webui": "^0.1.9",
     "lucide-react": "^1.23.0",
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
diff --git a/webui/package.json b/webui/package.json
index 533f5ea..a79bc53 100644
--- a/webui/package.json
+++ b/webui/package.json
@@ -24,7 +24,7 @@
     "react-dom": "^19.0.0",
     "react-router-dom": "^7.1.1",
     "lucide-react": "^1.23.0",
-    "@govoplan/core-webui": "^0.1.8"
+    "@govoplan/core-webui": "^0.1.9"
   },
   "peerDependenciesMeta": {
     "@govoplan/core-webui": {
diff --git a/webui/src/api/files.ts b/webui/src/api/files.ts
index e5d9259..ea2b2c4 100644
--- a/webui/src/api/files.ts
+++ b/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, ""))}`;
 }
diff --git a/webui/src/features/files/FilesPage.tsx b/webui/src/features/files/FilesPage.tsx
index 327e1d1..43f8ae2 100644
--- a/webui/src/features/files/FilesPage.tsx
+++ b/webui/src/features/files/FilesPage.tsx
@@ -8,6 +8,7 @@ import {
   FileDropZone,
   FormField,
   LoadingIndicator,
+  ResourceAccessExplanation,
   ToggleSwitch,
   hasScope,
   type ApiSettings,
@@ -2211,8 +2212,8 @@ export default function FilesPage({ settings, auth }: {settings: ApiSettings;aut
       }
 
       {accessExplanationTarget &&
-      <FileDialog title="i18n:govoplan-files.access_explanation.75ee7f62" onClose={() => {if (!resourceAccessLoading) {setAccessExplanationTarget(null);setResourceAccessExplanation(null);}}}>
-          <ResourceAccessExplanationContent
+      <FileDialog title="i18n:govoplan-core.access_explanation.75ee7f62" onClose={() => {if (!resourceAccessLoading) {setAccessExplanationTarget(null);setResourceAccessExplanation(null);}}}>
+          <ResourceAccessExplanation
           loading={resourceAccessLoading}
           explanation={resourceAccessExplanation}
           fallbackResourceLabel={accessExplanationTarget.label} />
@@ -2508,71 +2509,6 @@ export default function FilesPage({ settings, auth }: {settings: ApiSettings;aut
 
 }
 
-function ResourceAccessExplanationContent({
-  loading,
-  explanation,
-  fallbackResourceLabel
-}: {loading: boolean;explanation: ResourceAccessExplanationResponse | null;fallbackResourceLabel: string;}) {
-  if (loading) return <p className="muted small-note">i18n:govoplan-files.loading_access_explanation.04a7c934</p>;
-  if (!explanation) return null;
-  const userLabel = explanation.user.display_name || explanation.user.email || explanation.user.id;
-  const resourceLabel = explanation.provenance.find((item) => item.kind === "resource")?.label || fallbackResourceLabel || explanation.resource_id;
-  return (
-    <>
-      <div className="form-grid compact responsive-form-grid">
-        <div><span className="form-label">i18n:govoplan-files.user.9f8a2389</span><p>{userLabel}</p></div>
-        <div><span className="form-label">i18n:govoplan-files.resource.d1c626a9</span><p>{resourceLabel}</p></div>
-        <div><span className="form-label">i18n:govoplan-files.action.97c89a4d</span><p><code>{explanation.action}</code></p></div>
-        <div><span className="form-label">i18n:govoplan-files.evidence.8487d192</span><p>{explanation.provenance.length}</p></div>
-      </div>
-      {explanation.provenance.length === 0 ?
-      <p className="muted small-note">i18n:govoplan-files.no_access_evidence_was_returned.84a21e4e</p> :
-      <div className="admin-assignment-grid">
-          {explanation.provenance.map((item, index) =>
-        <div key={`${item.kind}:${item.id ?? index}`}>
-              <strong>{provenanceKindLabel(item.kind)}</strong>
-              <div className="muted small-note">
-                {item.source || "i18n:govoplan-files.no_source.6dcf9723"}
-                {item.id && <> · <code>{item.id}</code></>}
-              </div>
-              {item.label && <p>{item.label}</p>}
-              {Object.keys(item.details ?? {}).length > 0 && <p className="muted small-note">{formatProvenanceDetails(item.details ?? {})}</p>}
-            </div>
-        )}
-        </div>
-      }
-    </>);
-}
-
-function provenanceKindLabel(kind: string): string {
-  switch (kind) {
-    case "resource":
-      return "i18n:govoplan-files.resource.d1c626a9";
-    case "owner":
-      return "i18n:govoplan-files.owner.89ff3122";
-    case "share":
-      return "i18n:govoplan-files.share.09ca55ca";
-    case "policy":
-      return "i18n:govoplan-files.policy.0b779a05";
-    case "role":
-      return "i18n:govoplan-files.role.b5b4a5a2";
-    case "right":
-      return "i18n:govoplan-files.permission.2f81a22d";
-    default:
-      return kind;
-  }
-}
-
-function formatProvenanceDetails(details: Record<string, unknown>): string {
-  return Object.entries(details).map(([key, value]) => `${key}: ${formatProvenanceValue(value)}`).join("; ");
-}
-
-function formatProvenanceValue(value: unknown): string {
-  if (value === null || value === undefined) return "i18n:govoplan-files.none.6eef6648";
-  if (typeof value === "string" || typeof value === "number" || typeof value === "boolean") return String(value);
-  return JSON.stringify(value);
-}
-
 function FileSearchRow({
   value,
   caseSensitive,