Fix

backend/src/routes/admin.js

@@ -649,8 +649,12 @@ router.post('/exports/:filename/restore', async (req, res, next) => {
     for (const subdir of ['logos', 'icons']) {
       const dir = path.join(dataDir, subdir);
       fs.mkdirSync(dir, { recursive: true });
-      // Vidage du dossier existant
+      // Vidage du dossier existant (fichiers et sous-dossiers)
-      for (const f of fs.readdirSync(dir)) fs.unlinkSync(path.join(dir, f));
+      for (const f of fs.readdirSync(dir)) {
+        const fp = path.join(dir, f);
+        if (fs.statSync(fp).isDirectory()) fs.rmSync(fp, { recursive: true });
+        else fs.unlinkSync(fp);
+      }
       // Écriture des nouveaux fichiers
       for (const entry of entries.filter(e => e.name.startsWith(`${subdir}/`) && !e.name.endsWith('/'))) {
         fs.writeFileSync(path.join(dir, path.basename(entry.name)), entry.data);