fix(frontend): no sources repetition in data panel (#2132)

# Description

Please include a summary of the changes and the related issue. Please
also include relevant motivation and context.

## Checklist before requesting a review

Please delete options that are not relevant.

- [ ] My code follows the style guidelines of this project
- [ ] I have performed a self-review of my code
- [ ] I have commented hard-to-understand areas
- [ ] I have ideally added tests that prove my fix is effective or that
my feature works
- [ ] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged

## Screenshots (if appropriate):

frontend/app/chat/[chatId]/components/DataPanel/DataPanel.tsx

@@ -29,8 +29,9 @@ const DataPanel = (): JSX.Element => {
       const updatedSources: Source[] = [];
 
       newSources.forEach((newSource) => {
+        console.info(newSource.source_url.length);
         const existingSourceIndex = updatedSources.findIndex(
-          (source) => source.source_url === newSource.source_url
+          (source) => source.name.trim() === newSource.name.trim()
         );
         if (existingSourceIndex !== -1) {
           updatedSources[existingSourceIndex] = {