Zuno 1.1.1

Fixes

• Downloads work again. googlevideo serves only the first 1 MiB of a URL
  minted by an unattested session and refuses the rest with a bare 403, so
  every download past the opening megabyte failed. Sessions are now attested
  with a proof-of-origin token bound to the video id, which is the binding
  the CDN actually accepts.
• Playlist actions cover the whole playlist. Download, add-to-queue and
  add-to-playlist previously acted only on the rows that had scrolled into
  view, so "download this playlist" quietly fetched the visible hundred and
  looked finished.
• Artwork no longer blinks to the placeholder while dragging a song.
  Reordering changed every row's key, remounting the rows and restarting each
  image from scratch.
• Thumbnails are cached properly: one request per cover instead of one per
  row, failures are not retried forever, resolutions survive a restart, and a
  cover that stops working is re-resolved instead of staying broken.
• The onboarding tour no longer blocks the control it asks you to click, and
  its card is positioned next to what it highlights rather than in the corner.

Features

• Like and dislike on every song row, in the player and in the right-click
  menu. Dislike is new; it was not previously possible anywhere in the app.
• Download from the right-click menu, with cancel and remove.
• Skip any onboarding step, or the whole tour, with Back and progress.
• Discord presence and Last.fm scrobbling toggle from the toolbar, and
  Discord now has a Settings entry. Turning Discord off clears the presence
  rather than leaving your last track pinned to your profile.
• Download button on album and playlist headers, showing how many songs it
  would fetch.