feat(ui): anteprima duplicati/non smistati con pulizia cartella confermata

preload.js

@@ -10,4 +10,7 @@ contextBridge.exposeInMainWorld('api', {
   updateDestination: (destination) => ipcRenderer.invoke('update-destination', { destination }),
   openUnroutedFolder: () => ipcRenderer.invoke('open-unrouted-folder'),
   listUnroutedFiles: () => ipcRenderer.invoke('list-unrouted-files'),
+  listDuplicatesFiles: () => ipcRenderer.invoke('list-duplicates-files'),
+  clearUnroutedFiles: () => ipcRenderer.invoke('clear-unrouted-files'),
+  clearDuplicatesFiles: () => ipcRenderer.invoke('clear-duplicates-files'),
 });