feat(app): add maintenance mode

spa/src/main.js

@@ -24,6 +24,11 @@ categoriesStore.fetchTopCategories();
 categoriesStore.fetchCategories();
 
 settings.load()
+    .then(() => {
+        if (settings.app_enabled === false) {
+            throw new Error('App disabled (maintenance mode)');
+        }
+    })
     .then(() => {
         document.documentElement.setAttribute('data-theme', settings.theme[window.Telegram.WebApp.colorScheme]);
         if (settings.night_auto) {

spa/src/stores/SettingsStore.js

@@ -3,6 +3,7 @@ import {fetchSettings} from "@/utils/ftch.js";
 
 export const useSettingsStore = defineStore('settings', {
     state: () => ({
+        app_enabled: true,
         app_name: 'OpenCart Telegram магазин',
         app_icon: '',
         app_icon192: '',
@@ -32,6 +33,7 @@ export const useSettingsStore = defineStore('settings', {
             this.theme.light = settings.theme_light;
             this.theme.dark = settings.theme_dark;
             this.ya_metrika_enabled = settings.ya_metrika_enabled;
+            this.app_enabled = settings.app_enabled;
         }
     }
 });