0.5

User notification promotion rules, improved yt-dlp toggle, new theme, better
notification layouts, and world rejoin option in PROFILE.

Client

• Notification rules (TOOLS): get a notification for events VRChat does not
  notify about, like an unfriend or a friend coming online. A rule can be
  narrowed to some friends or a status, and quieted after firing.
• "Notify When Online" on a friend's profile.
• Text falls back to other fonts for characters the main one lacks, emoji
  included.
• Smoother thumbnails, and text is drawn faster.
• Folders and links are opened through SDL.
• Disabling yt-dlp should now last across world loads.
• No more join/leave notifications for yourself.
• Groups (TOOLS > Groups): see your groups, represent one, choose who sees
  you in it, toggle announcements, join or leave. A group notification opens
  its group.
• Group announcements can be read in full, from the group's page or from the
  announcement in the inbox.
• New theme. Text fields no longer blend into the background, and empty ones
  show a hint.
• Feed filters: All On and All Off moved to the top, and Close is visible
  again at the bottom.
• Optional system tray icon (--tray, or Settings > Window).
• "Friend Update" is hidden from the feed by default. Status changes show the
  new status as a badge.
• Inbox: a friend request shows who sent it inline, and other senders are
  links to their profile or group.
• Inbox: the tab badge counts unread notifications, cleared on viewing.
• Inbox: newest or oldest first, remembered.
• Send or cancel a friend request from a stranger's profile.
• Rejoin your last instance from your own profile, even after VRChat closed.
• Feed: credit and image update events have their own filters, and queue,
  badge and instance closure events show their details.
• Adds --mock, --log-replay and --screenshot for testing without VRChat.

Server

• Turns events matching the notification rules into notifications, kept in
  the inbox.
• New "status-change" event when a friend changes their status or status
  message.
• Fix a location change being dropped from the log when the same update also
  changed an avatar or profile.
• Member-side group actions, and a group list kept current from group events.
• Serves a group's current announcement.
• Notifications made by rules survive a restart.
• Sends and cancels friend requests.
• Remembers your last instance across restarts.
• Adds a --mock option that serves a scenario file without VRChat.

Web

• Notification rules (TOOLS > RULES), and NOTIFY WHEN ONLINE on a friend.
• Browser alerts for rule notifications while the page is open (needs HTTPS).
• Groups (TOOLS > GROUPS), same as the client.
• Group announcements can be read in full, same as the client.
• ADD FRIEND and CANCEL REQUEST on a stranger's pane.
• Rejoin your last instance from the PROFILE tab.

Packaging

• The AppImage ships AppStream metadata.
• The pipehelper is cross-built from Linux, so the AppImage bundles it and it
  is available as its own download.
• AArch64 AppImage (untested).

API

• Protocol version 15: notification rules (get_promotions, set_promotions,
  promotions), and vrcd.promoted entries in the inbox.
• Protocol version 16: set_promotions takes a request_id.
• Protocol version 17: status-change event, rules take statuses.
• Protocol version 18: groups (get_groups, get_group, group_action,
  groups).
• Protocol version 19: get_group_announcement.
• Protocol version 20: friend_request, friend_request_result.
• self carries lastLocation and lastWorldName.

Full Changelog: v0.4.1...v0.5.0