fix: refresh Access Settings policy from /access response

Reopening the Access Settings dialog after a save could leave the
radio on the wrong policy: the form initialized `access_policy`
from the route list's snapshot, but the list isn't refreshed when
the dialog closes, so the snapshot's value silently shadowed the
just-saved policy.

Backend now returns the route's authoritative `access_policy` on
`GET /v2/model-routes/{id}/access`. Use that value when the GET
resolves, falling back to the parent snapshot only as the initial
seed so the radio isn't briefly unselected.

While we're here, widen the `access_policy` type from a closed
union to `string` — plugins can contribute additional policy
values via the `accessControl.allowedUsersOverride` slot, so the
wire type shouldn't restrict to the OSS-side enum.

src/pages/llmodels/apis/index.ts

@@ -424,9 +424,14 @@ export async function queryBackendList(params?: { cluster_id: number }) {
 }
 
 export async function queryModelAccessUserList(id: number) {
-  return request<{ items: UserListItem[] }>(`${MODEL_ROUTES}/${id}/access`, {
-    method: 'GET'
-  });
+  // The response carries `access_policy` alongside `items` so the
+  // Access Settings dialog can refresh both halves from a single
+  // GET (the calling list snapshot may be stale after a prior
+  // save).
+  return request<{ items: UserListItem[]; access_policy?: string }>(
+    `${MODEL_ROUTES}/${id}/access`,
+    { method: 'GET' }
+  );
 }
 
 export async function updateModelAccessUser(params: {

src/pages/llmodels/components/access-control-modal/form.tsx

@@ -221,6 +221,10 @@ const AccessControlForm = forwardRef((props: AccessControlFormProps, ref) => {
       const userMap = new Map(allusers.map((u) => [u.key, u]));
 
       if (currentData?.id) {
+        // Seed the radio from the parent's snapshot so the form isn't
+        // momentarily unselected; the GET below replaces it with the
+        // server's authoritative value, which is what survives a save
+        // when the parent list hasn't been refreshed.
         form.setFieldsValue({
           access_policy: currentData?.access_policy
         });
@@ -246,7 +250,7 @@ const AccessControlForm = forwardRef((props: AccessControlFormProps, ref) => {
           setFilterInUsers(filterSet);
 
           form.setFieldsValue({
-            access_policy: currentData.access_policy,
+            access_policy: res.access_policy ?? currentData.access_policy,
             users: res.items.map((item) => ({ id: item.id }))
           });
         });

src/pages/llmodels/components/access-control-modal/index.tsx

@@ -23,7 +23,7 @@ const AccessControlModal: React.FC<
 
   const handleOnFinish = async (values: AccessControlFormData) => {
     try {
-      const data: any = {
+      const data: AccessControlFormData = {
         access_policy: values.access_policy,
         // `users` is only meaningful for the legacy `allowed_users`
         // policy; for the plugin override (typically the principal-

src/pages/llmodels/config/types.ts

@@ -25,7 +25,13 @@ export interface ListItem {
   local_path?: string;
   created_at: string;
   updated_at: string;
-  access_policy: 'public' | 'authed' | 'allowed_users';
+  // Built-in values are 'public' | 'authed' | 'allowed_users';
+  // additional values (e.g. 'allowed_principals') may be contributed
+  // by plugins via `accessControl.prependedPolicies` or by
+  // overriding the default via `accessControl.allowedUsersOverride`.
+  // The `(string & {})` tail keeps literal autocomplete for the
+  // built-ins while still accepting plugin-defined values.
+  access_policy: 'public' | 'authed' | 'allowed_users' | (string & {});
   generic_proxy?: boolean;
   gpu_selector?: {
     gpu_ids: string[];
@@ -346,7 +352,9 @@ export interface BackendOption {
 }
 
 export interface AccessControlFormData {
-  access_policy: 'public' | 'authed' | 'allowed_users';
+  // See `RouteItem.access_policy` for why plugin-defined values are
+  // accepted alongside the built-ins.
+  access_policy: 'public' | 'authed' | 'allowed_users' | (string & {});
   users: { id: number }[];
 }