[Client] Use localStorage instead of window

src/client/app/boot.js

@@ -66,7 +66,7 @@
 		lang = settings.device.lang;
 	}
 
-	window.lang = lang;
+	localStorage.setItem('lang', lang);
 	//#endregion
 
 	//#region Fetch locale data

src/client/app/config.ts

@@ -12,7 +12,7 @@ export const hostname = address.hostname;
 export const url = address.origin;
 export const apiUrl = url + '/api';
 export const wsUrl = url.replace('http://', 'ws://').replace('https://', 'wss://') + '/streaming';
-export const lang = window.lang;
+export const lang = localStorage.getItem('lang');
 export const langs = _LANGS_;
 export const locale = JSON.parse(localStorage.getItem('locale'));
 export const copyright = _COPYRIGHT_;