15.0.0 RC4

Added

• Simple polls
• Direct video upload
• Show upload notification with progress bar for files >1MB
• Server theming
• Handle expiring messages
• Respect permissions set by moderators
• Account chooser for "share to Nextcloud"
• Link previews

Changed

• Update design to Material 3
• Move allow guests preferences to conversation info

Fixed

• Load higher resolution avatars in conversation list
• Upload large files

For a full list, please see https://github.com/nextcloud/talk-android/milestone/59?closed=1