STCOR-851 accept locale from stripes-config

Allow `stripes.config.js` to set `config.locale` in order to override
the default value, `en-US`. This allows a tenant to set the locale for
pages that are displayed before authenticating, when the tenant's locale
can be read from mod-configuration.

The `stripes.config.js` value will be overwritten by the stored value
from mod-configuration, if present.

Refs STCOR-851

CHANGELOG.md

@@ -10,7 +10,8 @@
 * Make branding optional. Refs STCOR-847.
 * Idle-session timeout and "Keep working?" modal. Refs STCOR-776.
 * Implement password validation for Login Page. Refs STCOR-741.
-* Avoid deprecated `defaultProps` for functional components. Refs STCOR-844..
+* Avoid deprecated `defaultProps` for functional components. Refs STCOR-844.
+* Read locale from stripes-config before defaulting to `en-US`. Refs STCOR-851.
 
 ## [10.1.0](https://github.com/folio-org/stripes-core/tree/v10.1.0) (2024-03-12)
 [Full Changelog](https://github.com/folio-org/stripes-core/compare/v10.0.0...v10.1.0)

src/components/Root/Root.js

@@ -85,8 +85,9 @@ class Root extends Component {
   }
 
   componentDidMount() {
-    const { okapi, store, locale, defaultTranslations } = this.props;
+    const { okapi, store, defaultTranslations } = this.props;
     if (this.withOkapi) checkOkapiSession(okapi.url, store, okapi.tenant);
+    const locale = this.props.config.locale ?? 'en-US';
     // TODO: remove this after we load locale and translations at start from a public endpoint
     loadTranslations(store, locale, defaultTranslations);
   }
@@ -122,7 +123,6 @@ class Root extends Component {
 
   render() {
     const { logger, store, epics, config, okapi, actionNames, token, isAuthenticated, disableAuth, currentUser, currentPerms, locale, defaultTranslations, timezone, currency, plugins, bindings, discovery, translations, history, serverDown } = this.props;
-
     if (serverDown) {
       return <div>Error: server is down.</div>;
     }
@@ -254,8 +254,6 @@ Root.propTypes = {
 
 Root.defaultProps = {
   history: createBrowserHistory(),
-  // TODO: remove after locale is accessible from a global config / public url
-  locale: 'en-US',
   timezone: 'UTC',
   currency: 'USD',
   okapiReady: false,