refactor: globalized current locale, translation improvements

src/store/mainStore.ts

@@ -32,7 +32,8 @@ export const useMainStore = defineStore('mainStore', {
 
       chosenModalTrainId: undefined,
 
-      modalLastClickedTarget: null
+      modalLastClickedTarget: null,
+      currentLocale: 'pl'
     }) as MainStoreState,
 
   getters: {

src/store/typings.ts

@@ -12,6 +12,7 @@ export interface MainStoreState {
   driverStatsStatus: Status.Data;
   chosenModalTrainId?: string;
   modalLastClickedTarget: EventTarget | null;
+  currentLocale: string;
 }
 
 export interface StationJSONData {