fix: file upload inputs only show Files picker, not camera/photo library

Commit notes

On mobile (especially iOS), using audio/* in the accept attribute causes the browser to show Photo Library and Camera options. By using only specific file extensions (.wav, .mp3, .flac, etc.), the file input will only show the Files/Browse option.

- Updated LibrarySearchFilter.svelte accept attribute - Updated upload page file inputs

Co-authored-by: armin.naimi <[email redacted]>