@@ -0,0 +1,19 @@
+---
+'@object-ui/fields': patch
+'@object-ui/i18n': patch
+---
+
+feat(fields): Setup's notification topic and channel fields offer the served list and still take any typed value
+
+Clause-②: yes (widening) — five new `fields.preferenceOption.*` keys in every published `@object-ui/i18n` pack, and `field:notification-topic` / `field:notification-channel` join `@object-ui/fields`' registered widget keys (`RegisteredFieldWidgetType`); nothing is narrowed.
+Metadata-protocol: none
+
+A notification preference's `topic` and `channel`, and a notification template's `topic`, already declare `widget: 'notification-topic'` / `'notification-channel'`. The record form now resolves both: `@object-ui/fields` registers `field:notification-topic` and `field:notification-channel`, a fillable arm of the registry-name picker (`RegistryRefField`).
+
+- **The list.** Read from `GET /api/v1/messaging/preference-options` through the host's authenticated fetch (`SchemaRendererContext.apiFetch`), once per page for every field that draws from it, and listed in the order the server sends: `*` first, shown as "All topics (*)" / "All channels (*)".
+- **A typed value.** Typing in the picker's search box offers a row that commits the text exactly as typed. A stored value the list does not hold stays on screen as its own option, marked "not in the list". Nothing is refused or rewritten; the server stores what it is given, as before.
+- **A channel that is not configured** is listed, labelled "(not configured)", and can be picked.
+- **No list.** When the request fails, or answers an empty list, the field is the plain text box it was before, with no notice.
+- **Strings.** Five new `fields.preferenceOption.*` keys in every built-in language pack (`zh-Hant` regenerated from `zh-Hans`).
+
+The template's `channel` field declares no widget and stays a text box.
@@ -179,6 +179,8 @@ export const PARAM_VALUE_SHAPES: Readonly<Record<string, ParamValueShapeSpec>> =
   'recipient-picker': { base: 'string', cardinality: 'scalar', widgetHintOnly: true, note: 'Recipient id string. Widget-hint only — not a declarable param type.' },
   'position-ref': { base: 'string', cardinality: 'scalar', widgetHintOnly: true, note: 'Position name string. Widget-hint only — not a declarable param type.' },
   'permission-ref': { base: 'string', cardinality: 'scalar', widgetHintOnly: true, note: 'Permission-set name string. Widget-hint only — not a declarable param type.' },
+  'notification-topic': { base: 'string', cardinality: 'scalar', widgetHintOnly: true, note: 'Notification topic string. Widget-hint only — not a declarable param type.' },
+  'notification-channel': { base: 'string', cardinality: 'scalar', widgetHintOnly: true, note: 'Notification channel string. Widget-hint only — not a declarable param type.' },
 });
 
 /** Concrete `base[]` tag for a base shape. */
 
@@ -146,6 +146,8 @@ export const KNOWN_SCHEMA_TYPES: readonly string[] = [
   'field:markdown',
   'field:master_detail',
   'field:multiselect',
+  'field:notification-channel',
+  'field:notification-topic',
   'field:number',
   'field:object',
   'field:object-ref',
 
@@ -190,6 +190,7 @@ export const INLINE_EXCLUDED_FIELD_TYPES = new Set<string>([
   // sibling fields / a loaded object catalog), not inline in a grid cell.
   'object-ref', 'filter-condition', 'recipient-picker',
   'position-ref', 'permission-ref',
+  'notification-topic', 'notification-channel',
 ]);
 
 /** Field types whose value is chosen in one discrete gesture (no free typing). */
 
@@ -134,7 +134,12 @@ import { QRCodeField } from '../widgets/QRCodeField';
 import { ObjectRefField } from '../widgets/ObjectRefField';
 import { FilterConditionField } from '../widgets/FilterConditionField';
 import { RecipientPickerField } from '../widgets/RecipientPickerField';
-import { PositionRefField, PermissionRefField } from '../widgets/RegistryRefField';
+import {
+  PositionRefField,
+  PermissionRefField,
+  NotificationTopicField,
+  NotificationChannelField,
+} from '../widgets/RegistryRefField';
 
 /** Same widget map as the #3291 sweep, so the parity check covers the registry. */
 const WIDGETS: Record<string, ComponentType<any>> = {
@@ -188,6 +193,8 @@ const WIDGETS: Record<string, ComponentType<any>> = {
   'recipient-picker': RecipientPickerField,
   'position-ref': PositionRefField,
   'permission-ref': PermissionRefField,
+  'notification-topic': NotificationTopicField,
+  'notification-channel': NotificationChannelField,
 };
 
 /**
 
@@ -144,7 +144,12 @@ import { QRCodeField } from '../widgets/QRCodeField';
 import { ObjectRefField } from '../widgets/ObjectRefField';
 import { FilterConditionField } from '../widgets/FilterConditionField';
 import { RecipientPickerField } from '../widgets/RecipientPickerField';
-import { PositionRefField, PermissionRefField } from '../widgets/RegistryRefField';
+import {
+  PositionRefField,
+  PermissionRefField,
+  NotificationTopicField,
+  NotificationChannelField,
+} from '../widgets/RegistryRefField';
 
 /* ════════════════════════════════════════════════════════════════════════════
  * Every registered field widget, both hosts
@@ -207,6 +212,8 @@ const WIDGETS: Record<string, ComponentType<any>> = {
   'recipient-picker': RecipientPickerField,
   'position-ref': PositionRefField,
   'permission-ref': PermissionRefField,
+  'notification-topic': NotificationTopicField,
+  'notification-channel': NotificationChannelField,
 };
 
 /** Option widgets render an "unfillable" placeholder unless offered a list. */
 
@@ -4890,6 +4890,14 @@ const fieldWidgetMap = {
   //   permission-ref → a permission set (sys_user_permission_set.permission_set)
   'position-ref': () => import('./widgets/RegistryRefField.js').then(m => ({ default: m.PositionRefField })),
   'permission-ref': () => import('./widgets/RegistryRefField.js').then(m => ({ default: m.PermissionRefField })),
+  // The fillable arm of the same widget (#30208 row 6, ruling E on #30527): a
+  // notification preference's `topic` / `channel` and a template's `topic`,
+  // offered from `GET /api/v1/messaging/preference-options` and still taking
+  // any typed value, which the server stores as written.
+  //   notification-topic   → a notification topic, `*` for all
+  //   notification-channel → a notification channel, `*` for all
+  'notification-topic': () => import('./widgets/RegistryRefField.js').then(m => ({ default: m.NotificationTopicField })),
+  'notification-channel': () => import('./widgets/RegistryRefField.js').then(m => ({ default: m.NotificationChannelField })),
 } satisfies Record<string, FieldWidgetLoader>;
 
 /** The registered field widget keys, as a literal union (objectui#4857). */
@@ -5072,6 +5080,8 @@ const FIELD_TYPES_SKIP_FALLBACK = new Set([
   'recipient-picker',
   'position-ref',
   'permission-ref',
+  'notification-topic',
+  'notification-channel',
   // ── Retired bare node keys (objectui#10859 batch 8) ───────────────────────
   // Each was registered bare only as this loop's fallback: no other package
   // owns the name, no form path reads it, and no document authors it as a
@@ -5220,6 +5230,8 @@ export const FIELD_WIDGET_LABELLING: Record<
   'recipient-picker': 'control',
   'position-ref': 'control',
   'permission-ref': 'control',
+  'notification-topic': 'control',
+  'notification-channel': 'control',
 };
 
 export function registerField(fieldType: string): void {