feat: demo page realisation

src/app/router/index.tsx

@@ -33,11 +33,18 @@ import {
   StationEditPage,
   RouteCreatePage,
   RoutePreview,
+  DemoPage,
   RouteEditPage,
   ArticlePreviewPage,
   CountryAddPage,
 } from "@pages";
-import { authStore, createSightStore, editSightStore, ROUTE_REQUIRED_RESOURCES } from "@shared";
+import {
+  authStore,
+  createSightStore,
+  editSightStore,
+  languageStore,
+  ROUTE_REQUIRED_RESOURCES,
+} from "@shared";
 import { Layout } from "@widgets";
 import { runInAction } from "mobx";
 import React, { useEffect } from "react";
@@ -102,6 +109,14 @@ const ClearStoresWrapper: React.FC<{ children: React.ReactNode }> = ({
     runInAction(() => {
       editSightStore.hasLoadedCommon = false;
     });
+
+    if (
+      location.pathname.includes("create") ||
+      location.pathname.includes("edit") ||
+      location.pathname.includes("add")
+    ) {
+      languageStore.setLanguage("ru");
+    }
   }, [location]);
 
   return <>{children}</>;
@@ -120,6 +135,10 @@ const router = createBrowserRouter([
     path: "route-preview/:id",
     element: <RoutePreview />,
   },
+  {
+    path: "demo/:id",
+    element: <DemoPage />,
+  },
   {
     path: "/",
     element: (