diff --git a/frontend/src/components/FileExplorer.tsx b/frontend/src/components/FileExplorer.tsx
index 6b372a0..7ae16a8 100644
--- a/frontend/src/components/FileExplorer.tsx
+++ b/frontend/src/components/FileExplorer.tsx
@@ -902,14 +902,14 @@ export default function FileExplorer({ onLogout }: FileExplorerProps) {
     const totalBytes = entries.reduce((acc, curr) => acc + curr.file.size, 0);
     const batchName = totalFiles === 1 ? entries[0].file.name : `Uploading ${totalFiles} items`;
 
-    setUploads(prev => [...prev, {
+    const newBatch: UploadBatch = {
       id: batchId,
       name: batchName,
       totalBytes,
       uploadedBytes: 0,
       totalFiles,
       filesUploaded: 0,
-      status: 'uploading' as const,
+      status: 'uploading',
       abortController: new AbortController()
     };
 
diff --git a/frontend/src/lib/api.ts b/frontend/src/lib/api.ts
index 91c72a7..eef78d2 100644
--- a/frontend/src/lib/api.ts
+++ b/frontend/src/lib/api.ts
@@ -240,7 +240,7 @@ class ApiClient {
     return res.json();
   }
 
-  upload(file: File, destPath: string, options?: { onProgress?: (percent: number) => void, overwrite?: boolean }): Promise<void> {
+  upload(file: File, destPath: string, options?: { onProgress?: (percent: number) => void, overwrite?: boolean, signal?: AbortSignal }): Promise<void> {
     return new Promise((resolve, reject) => {
       const upload = new tus.Upload(file, {
         endpoint: `${API_BASE}/api/tus/`,