fix: Fixed the issue of error reporting when uploading files in the chat box #2897 (#2898)

### What problem does this PR solve?

fix: Fixed the issue of error reporting when uploading files in the chat
box #2897

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)
- [ ] New Feature (non-breaking change which adds functionality)
- [ ] Documentation Update
- [ ] Refactoring
- [ ] Performance Improvement
- [ ] Other (please describe):

web/src/pages/chat/hooks.ts

@@ -582,14 +582,18 @@ export const useSendButtonDisabled = (value: string) => {
 export const useCreateConversationBeforeUploadDocument = () => {
   const { setConversation } = useSetConversation();
   const { dialogId } = useGetChatSearchParams();
+  const { getConversationIsNew } = useSetChatRouteParams();
 
   const createConversationBeforeUploadDocument = useCallback(
     async (message: string) => {
-      const data = await setConversation(message, true);
+      const isNew = getConversationIsNew();
+      if (isNew === 'true') {
+        const data = await setConversation(message, true);
 
-      return data;
+        return data;
+      }
     },
-    [setConversation],
+    [setConversation, getConversationIsNew],
   );
 
   return {

web/src/pages/chat/markdown-content/index.less

@@ -43,3 +43,8 @@
     }
   }
 }
+
+.fileThumbnail {
+  display: inline-block;
+  max-width: 40px;
+}

web/src/pages/chat/markdown-content/index.tsx

@@ -118,7 +118,11 @@ const MarkdownContent = ({
             {documentId && (
               <Flex gap={'small'}>
                 {fileThumbnail ? (
-                  <img src={fileThumbnail} alt="" />
+                  <img
+                    src={fileThumbnail}
+                    alt=""
+                    className={styles.fileThumbnail}
+                  />
                 ) : (
                   <SvgIcon
                     name={`file-icon/${fileExtension}`}