fix

apps/frontend/lib/chat-image-compress.ts

@@ -1,3 +1,5 @@
+import { resolveChatContentType } from '@/lib/chat-media';
+
 const DEFAULT_MAX_EDGE = 2560;
 const DEFAULT_QUALITY = 0.82;
 
@@ -107,7 +109,8 @@ export async function readImageDimensions(file: File) {
 }
 
 export function createFilePreviewUrl(file: File) {
-  if (file.type.startsWith('image/')) {
+  const contentType = resolveChatContentType(file);
+  if (contentType.startsWith('image/') || contentType.startsWith('video/')) {
     return URL.createObjectURL(file);
   }
   return null;