diff --git a/frontend/src/components/buckets/ObjectDetailsView.tsx b/frontend/src/components/buckets/ObjectDetailsView.tsx
index cb73f98..ec30287 100644
--- a/frontend/src/components/buckets/ObjectDetailsView.tsx
+++ b/frontend/src/components/buckets/ObjectDetailsView.tsx
@@ -9,16 +9,7 @@ import { ConfirmDialog } from '@/components/ui/confirm-dialog';
 import { ArrowLeft, ChevronRight, Copy, Download, File, Loader2, Trash2 } from 'lucide-react';
 import { toast } from 'sonner';
 import { formatBytes } from '@/lib/file-utils';
-
-function formatDate(value: string) {
-  return new Date(value).toLocaleString(undefined, {
-    year: 'numeric',
-    month: 'short',
-    day: 'numeric',
-    hour: '2-digit',
-    minute: '2-digit',
-  });
-}
+import { formatDate } from '@/lib/utils';
 
 function CardSection({ title, children }: { title: string; children: React.ReactNode }) {
   return (
diff --git a/frontend/src/hooks/useBucketObjects.ts b/frontend/src/hooks/useBucketObjects.ts
index 68ccfff..08e893a 100644
--- a/frontend/src/hooks/useBucketObjects.ts
+++ b/frontend/src/hooks/useBucketObjects.ts
@@ -90,10 +90,7 @@ export function useBucketObjects(bucketName: string | null, currentPath: string
 
     setUploadTasks(tasks);
 
-    let successCount = 0;
-    let errorCount = 0;
-
-    for (const task of tasks) {
+    const results = await Promise.all(tasks.map(async (task) => {
       try {
         setUploadTasks(prev => prev.map(t =>
           t.id === task.id ? { ...t, status: 'uploading' as const } : t
@@ -109,16 +106,19 @@ export function useBucketObjects(bucketName: string | null, currentPath: string
         setUploadTasks(prev => prev.map(t =>
           t.id === task.id ? { ...t, status: 'completed' as const, progress: 100 } : t
         ));
-        successCount++;
+        return true;
       } catch (error) {
         const errorMessage = error instanceof Error ? error.message : 'Upload failed';
         setUploadTasks(prev => prev.map(t =>
           t.id === task.id ? { ...t, status: 'error' as const, error: errorMessage } : t
         ));
-        errorCount++;
         console.error(`Failed to upload ${task.key}:`, error);
+        return false;
       }
-    }
+    }));
+
+    const successCount = results.filter(Boolean).length;
+    const errorCount = results.length - successCount;
 
     if (errorCount === 0) {
       if (hasRelativePaths && folders.size > 0) {
diff --git a/frontend/src/pages/BucketSettings.tsx b/frontend/src/pages/BucketSettings.tsx
index 781c8d2..f94177e 100644
--- a/frontend/src/pages/BucketSettings.tsx
+++ b/frontend/src/pages/BucketSettings.tsx
@@ -7,27 +7,11 @@ 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';
 
-function formatBytes(n?: number) {
-  if (n == null) return '—';
-  if (n < 1024) return `${n} B`;
-  const units = ['KB', 'MB', 'GB', 'TB'];
-  let v = n / 1024;
-  for (const u of units) {
-    if (v < 1024) return `${v.toFixed(v >= 10 ? 0 : 1)} ${u}`;
-    v /= 1024;
-  }
-  return `${v.toFixed(0)} PB`;
-}
-
-function formatDate(iso?: string) {
-  if (!iso) return '—';
-  try {
-    return new Date(iso).toLocaleString();
-  } catch {
-    return iso;
-  }
-}
+const formatBytesOrDash = (n?: number) => (n == null ? '—' : formatBytes(n));
+const formatDateOrDash = (iso?: string) => (iso ? formatDateUtil(iso) : '—');
 
 export function BucketSettings() {
   const { bucketName = '' } = useParams<{ bucketName: string }>();
@@ -78,9 +62,9 @@ export function BucketSettings() {
         <dl className="grid grid-cols-1 gap-x-6 gap-y-4 px-5 py-5 sm:grid-cols-2">
           <Field label="Name" value={<span className="font-mono text-[13.5px]">{bucket.name}</span>} />
           <Field label="Region" value={bucket.region ?? '—'} />
-          <Field label="Created" value={formatDate(bucket.creationDate)} />
+          <Field label="Created" value={formatDateOrDash(bucket.creationDate)} />
           <Field label="Objects" value={bucket.objectCount != null ? bucket.objectCount.toLocaleString() : '—'} />
-          <Field label="Size" value={formatBytes(bucket.size)} />
+          <Field label="Size" value={formatBytesOrDash(bucket.size)} />
           <Field
             label="Website"
             value={
diff --git a/frontend/src/store/auth-store.ts b/frontend/src/store/auth-store.ts
index 02b8986..72ab794 100644
--- a/frontend/src/store/auth-store.ts
+++ b/frontend/src/store/auth-store.ts
@@ -98,8 +98,11 @@ export const useAuthStore = create<AuthStore>()(
             isLoading: false,
             error: null
           });
-        } catch (error: any) {
-          const errorMessage = error.response?.data?.error?.message || 'Login failed';
+        } catch (error) {
+          const errorMessage =
+            (error as { response?: { data?: { error?: { message?: string } } } })
+              .response?.data?.error?.message ||
+            (error instanceof Error ? error.message : 'Login failed');
           set({
             error: errorMessage,
             isLoading: false,