Repair Wasphere Attachment Delivery

I’m running a chat interface powered by Wasphere (guide: https://wasphere.com/docs/guides/send-messages/). The front-end already lets users attach files or record voice notes, and my JavaScript hands those objects off to a PHP backend. Everything appears to post, yet nothing ever reaches the recipient. My hunch is that I’ve wired the wrong API endpoint, but the real weakness seems to sit in the current file-handling logic on the server. I need you to step through the PHP, confirm how the files and audio are packaged, verify the Wasphere endpoint, and patch whatever is blocking delivery. Scope of the fix • Review existing JS upload/record code and corresponding PHP upload handler. Acceptance criteria – A user can attach an image, PDF, or other document and the recipient sees it instantly. – A recorded audio clip plays for the recipient with no corruption.