unused code in financial-data-analyst route.ts

[matthew-dews]

fileData in financial-data-analyst\app\api\finance\route.ts appears like it will never be used as the frontend will never populate that field. This looks like a vestige of a refactor as the frontend ends up constructing the meat of what gets sent to the Anthropic API.

I see two ways to resolve this:

• Remove all usage of fileData in route.ts. This is the most straightforward but a benefit of having that functionality on the backend is you don't allow a malicious frontend to insert extra stuff into what gets sent to the Anthropic API.
• Move all the work done by apiMessages in app\finance\page.tsx to be done on the backend. More work but maybe a better practice to follow?

This is an example app, so maybe the security aspect isn't worth worrying about here. At the very least I found it confusing to have this functionality in both places because I initially modified what was in route.ts and it took me a while to figure out why the change wasn't having any effect (I actually needed to make the change in page.tsx).