From 107acc68a24ca6a68450365a87e793830ee05c73 Mon Sep 17 00:00:00 2001
From: Ryan Westfall <ryan@aimloperations.com>
Date: Tue, 20 Oct 2026 10:05:12 -0500
Subject: [PATCH] Accept a Blob when checking whether a chat attachment is an
 image.

Beta deploy typechecks the composer file as Blob, so the File-only helper failed the production build after the vision merge. Closes #130.

Co-authored-by: Cursor <cursoragent@cursor.com>
---
 .../llm-fe/pages/AsyncDashboard2/AsyncDashboard2.tsx | 12 ++++++------
 llm-fe/src/llm-fe/utils/visionAttachment.test.ts     |  1 +
 llm-fe/src/llm-fe/utils/visionAttachment.ts          |  2 +-
 3 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/llm-fe/src/llm-fe/pages/AsyncDashboard2/AsyncDashboard2.tsx b/llm-fe/src/llm-fe/pages/AsyncDashboard2/AsyncDashboard2.tsx
index 7608a5b..29db94e 100644
--- a/llm-fe/src/llm-fe/pages/AsyncDashboard2/AsyncDashboard2.tsx
+++ b/llm-fe/src/llm-fe/pages/AsyncDashboard2/AsyncDashboard2.tsx
@@ -335,15 +335,15 @@ const AlwaysScrollToBottom = ({ trigger }: { trigger: string | number }): JSX.El
   return <div ref={elementRef} />;
 };
 
-const AttachmentPreview = ({ file }: { file: File | null }): JSX.Element | null => {
+const AttachmentPreview = ({ file }: { file: Blob | null }): JSX.Element | null => {
   const theme = useContext(ThemeContext);
   const [url, setUrl] = useState<string | null>(null);
   useEffect(() => {
-    if (!isImageFile(file)) {
+    if (!file || !isImageFile(file)) {
       setUrl(null);
       return;
     }
-    const next = URL.createObjectURL(file as File);
+    const next = URL.createObjectURL(file);
     setUrl(next);
     return () => URL.revokeObjectURL(next);
   }, [file]);
@@ -370,7 +370,7 @@ const AttachmentPreview = ({ file }: { file: File | null }): JSX.Element | null
       color: theme?.darkMode ? "rgba(255,255,255,0.6)" : "rgba(0,0,0,0.6)",
       textAlign: "center",
     }}>
-      Attached: {file.name}
+      Attached: {file instanceof File ? file.name : "attachment"}
     </div>
   );
 };
@@ -473,7 +473,7 @@ const AsyncDashboardInner = (): JSX.Element => {
     }
     try {
       clearActivity();
-      const attachedImage = isImageFile(file) ? URL.createObjectURL(file as File) : null;
+      const attachedImage = file && isImageFile(file) ? URL.createObjectURL(file) : null;
       const tempConversations: ConversationPrompt[] = [
         ...conversationDetails,
         new ConversationPrompt({
@@ -753,7 +753,7 @@ const AsyncDashboardInner = (): JSX.Element => {
                     </span>
                   </Tooltip>
                 </StyledInputContainer>
-                <AttachmentPreview file={formik.values.file as File | null} />
+                <AttachmentPreview file={formik.values.file} />
               </Form>
             )}
           </Formik>
diff --git a/llm-fe/src/llm-fe/utils/visionAttachment.test.ts b/llm-fe/src/llm-fe/utils/visionAttachment.test.ts
index fb8ea27..3eaed26 100644
--- a/llm-fe/src/llm-fe/utils/visionAttachment.test.ts
+++ b/llm-fe/src/llm-fe/utils/visionAttachment.test.ts
@@ -16,6 +16,7 @@ describe('visionAttachment', () => {
   it('detects image files', () => {
     expect(isImageFile(new File(['x'], 'a.png', { type: 'image/png' }))).toBe(true);
     expect(isImageFile(new File(['x'], 'a.pdf', { type: 'application/pdf' }))).toBe(false);
+    expect(isImageFile(new Blob(['x'], { type: 'image/png' }))).toBe(true);
     expect(isImageFile(null)).toBe(false);
   });
 });
diff --git a/llm-fe/src/llm-fe/utils/visionAttachment.ts b/llm-fe/src/llm-fe/utils/visionAttachment.ts
index 380039c..65b0e9b 100644
--- a/llm-fe/src/llm-fe/utils/visionAttachment.ts
+++ b/llm-fe/src/llm-fe/utils/visionAttachment.ts
@@ -1,7 +1,7 @@
 export const CHAT_FILE_ACCEPT =
   '.csv,.xlsx,.txt,.pdf,.PDF,image/png,image/jpeg,image/webp,image/gif';
 
-export function isImageFile(file: File | null | undefined): boolean {
+export function isImageFile(file: Blob | null | undefined): boolean {
   return Boolean(file && file.type.startsWith('image/'));
 }
 
-- 
2.54.0