diff --git a/frontend/src/components/buckets/ObjectDetailsView.tsx b/frontend/src/components/buckets/ObjectDetailsView.tsx
index ec30287..47e2d9f 100644
--- a/frontend/src/components/buckets/ObjectDetailsView.tsx
+++ b/frontend/src/components/buckets/ObjectDetailsView.tsx
@@ -87,7 +87,7 @@ export function ObjectDetailsView() {
       document.body.removeChild(a);
       toast.success('Download started');
     } catch {
-      toast.error('Download failed');
+      // error toast handled by axios interceptor
     }
   };
 
@@ -99,7 +99,7 @@ export function ObjectDetailsView() {
       toast.success('Object deleted');
       navigate(backHref);
     } catch {
-      toast.error('Delete failed');
+      // error toast handled by axios interceptor
     } finally {
       setDeleting(false);
       setDeleteOpen(false);
diff --git a/frontend/src/pages/BucketPermissions.tsx b/frontend/src/pages/BucketPermissions.tsx
index 1fc5968..65b714f 100644
--- a/frontend/src/pages/BucketPermissions.tsx
+++ b/frontend/src/pages/BucketPermissions.tsx
@@ -44,10 +44,9 @@ export function BucketPermissions() {
         accessKeyId: selectedKey,
         permissions: { read, write, owner },
       });
-      toast.success('Permissions granted');
       setSelectedKey(''); setRead(false); setWrite(false); setOwner(false);
-    } catch (err) {
-      toast.error(err instanceof Error ? err.message : 'Grant failed');
+    } catch {
+      // error toast handled by axios interceptor
     }
   };
 
diff --git a/frontend/src/pages/BucketSettings.tsx b/frontend/src/pages/BucketSettings.tsx
index 250596d..789ea42 100644
--- a/frontend/src/pages/BucketSettings.tsx
+++ b/frontend/src/pages/BucketSettings.tsx
@@ -6,7 +6,6 @@ import { Button } from '@/components/ui/button';
 import { Badge } from '@/components/ui/badge';
 import { EmptyState } from '@/components/ui/empty-state';
 import { DangerousConfirmDialog } from '@/components/ui/dangerous-confirm-dialog';
-import { toast } from 'sonner';
 import { formatBytes } from '@/lib/file-utils';
 import { formatDate as formatDateUtil } from '@/lib/utils';
 
@@ -44,8 +43,7 @@ export function BucketSettings() {
     try {
       await deleteMutation.mutateAsync(bucket.name);
       navigate('/buckets');
-    } catch (err) {
-      toast.error(err instanceof Error ? err.message : 'Delete failed');
+    } catch {
       setDeleting(false);
     }
   };
diff --git a/frontend/src/pages/BucketWebsite.tsx b/frontend/src/pages/BucketWebsite.tsx
index e174614..346800e 100644
--- a/frontend/src/pages/BucketWebsite.tsx
+++ b/frontend/src/pages/BucketWebsite.tsx
@@ -65,8 +65,8 @@ export function BucketWebsite() {
       });
       await queryClient.invalidateQueries({ queryKey: ['buckets'] });
       toast.success(disabling ? 'Website disabled' : 'Website configuration updated');
-    } catch (err) {
-      toast.error(err instanceof Error ? err.message : 'Save failed');
+    } catch {
+      // error toast handled by axios interceptor
     } finally {
       setSaving(false);
     }
diff --git a/frontend/src/pages/Buckets.tsx b/frontend/src/pages/Buckets.tsx
index 737c49b..438d408 100644
--- a/frontend/src/pages/Buckets.tsx
+++ b/frontend/src/pages/Buckets.tsx
@@ -8,7 +8,6 @@ import { DangerousConfirmDialog } from '@/components/ui/dangerous-confirm-dialog
 import { PageHeader } from '@/components/ui/page-header';
 import { Button } from '@/components/ui/button';
 import type { Bucket } from '@/types';
-import { toast } from 'sonner';
 
 export function Buckets() {
   const navigate = useNavigate();
@@ -24,10 +23,8 @@ export function Buckets() {
   const createBucket = async (name: string, region?: string) => {
     try {
       await createMutation.mutateAsync({ name, region });
-      toast.success(`Bucket "${name}" created`);
       return true;
-    } catch (err) {
-      toast.error(err instanceof Error ? err.message : 'Create failed');
+    } catch {
       return false;
     }
   };
@@ -38,8 +35,8 @@ export function Buckets() {
     try {
       await deleteMutation.mutateAsync(deleteTarget.name);
       setDeleteTarget(null);
-    } catch (err) {
-      toast.error(err instanceof Error ? err.message : 'Delete failed');
+    } catch {
+      // error toast handled by axios interceptor
     } finally {
       setDeleting(false);
     }