- [ ] in the playlist sidebar, pressing the `+` button by the queue indicator should it expand it to double it's size (with a nice transition) split down the middle with the left side being a file icon and the right side being a link icon.
    - pressing the file icon should open the file picker for local file selection (current behavior)
    - pressing the link icon should present an input field that opens upwards with a nice transition where the user can paste a link; pressing return will fetch and add the video.
        - we already have this ui effect in the start screen when pressing the "open url" button, which we should be able to reuse much of.