macOS: Add support for 12/24-hour time display preferences

ts/types/I18N.ts

@@ -1,6 +1,7 @@
 // Copyright 2020 Signal Messenger, LLC
 // SPDX-License-Identifier: AGPL-3.0-only
 
+import { z } from 'zod';
 import type { LocalizerType } from './Util';
 
 export type { LocalizerType } from './Util';
@@ -35,3 +36,11 @@ export type LocaleType = {
   i18n: LocalizerType;
   messages: LocaleMessagesType;
 };
+
+export enum HourCyclePreference {
+  Prefer24 = 'Prefer24', // either h23 or h24
+  Prefer12 = 'Prefer12', // either h11 or h12
+  UnknownPreference = 'UnknownPreference',
+}
+
+export const HourCyclePreferenceSchema = z.nativeEnum(HourCyclePreference);

ts/types/RendererConfig.ts

@@ -5,6 +5,7 @@ import { z } from 'zod';
 
 import { Environment } from '../environment';
 import { themeSettingSchema } from './StorageUIKeys';
+import { HourCyclePreferenceSchema } from './I18N';
 
 const environmentSchema = z.nativeEnum(Environment);
 
@@ -46,6 +47,7 @@ export const rendererConfigSchema = z.object({
   osVersion: configRequiredStringSchema,
   resolvedTranslationsLocale: configRequiredStringSchema,
   resolvedTranslationsLocaleDirection: z.enum(['ltr', 'rtl']),
+  hourCyclePreference: HourCyclePreferenceSchema,
   preferredSystemLocales: z.array(configRequiredStringSchema),
   name: configRequiredStringSchema,
   nodeVersion: configRequiredStringSchema,

ts/types/Util.ts

@@ -5,7 +5,7 @@ import type { IntlShape } from 'react-intl';
 import type { UUIDStringType } from './UUID';
 import type { LocaleDirection } from '../../app/locale';
 
-import type { LocaleMessagesType } from './I18N';
+import type { HourCyclePreference, LocaleMessagesType } from './I18N';
 
 export type StoryContextType = {
   authorUuid?: UUIDStringType;
@@ -28,6 +28,7 @@ export type LocalizerType = {
   getLocale(): string;
   getLocaleMessages(): LocaleMessagesType;
   getLocaleDirection(): LocaleDirection;
+  getHourCyclePreference(): HourCyclePreference;
 };
 
 export enum SentMediaQualityType {