**Motivations:**
- User requested spinner during cache update and page reload after completion
- Better UX: visual feedback during update and automatic refresh to show updated data
**Root causes:**
- No visual spinner during cache update operation
- Page was not reloaded after cache update, requiring manual refresh
**Correctifs:**
- Added Spinner component with CSS animation
- Modified button to show spinner during update
- Added page reload using router.reload() after successful cache update
- Wait 1 second after success message before reloading to show feedback
**Evolutions:**
- Better user experience with visual feedback during cache update
- Automatic page reload ensures updated data is displayed immediately
- Spinner provides clear indication that operation is in progress
**Pages affectées:**
- components/CacheUpdateManager.tsx
