Enhance upload functionality in UploadStore and UI: implement retry mechanism for failed uploads, allowing users to manually retry uploads from the UploadSnackbar. Update translations to include retry options and improve error handling for transient issues during media uploads.

frontend/src/shared/api/client.ts

@@ -24,7 +24,7 @@ type RequestOptions = {
   skipRefresh?: boolean
 }
 
-async function refreshAccessToken(): Promise<boolean> {
+export async function refreshAccessToken(): Promise<boolean> {
   if (!refreshInFlight) {
     refreshInFlight = (async () => {
       try {

frontend/src/shared/lib/i18n.ts

@@ -19,6 +19,7 @@ const resources = {
       common: {
         save: 'Сохранить',
         cancel: 'Отмена',
+        retry: 'Повторить',
         delete: 'Удалить',
         create: 'Создать',
         loading: 'Загрузка…',
@@ -279,6 +280,7 @@ const resources = {
       common: {
         save: 'Save',
         cancel: 'Cancel',
+        retry: 'Retry',
         delete: 'Delete',
         create: 'Create',
         loading: 'Loading…',