This PR fixes two issues: 1. The prompt library window didn't set an `app_id` on Linux, which caused it to be missing the Zed logo 2. A dangling reference to the window in the Wayland client code, which caused the prompt library window not to close. See: https://github.com/zed-industries/zed/pull/13201 Release Notes: - Linux: Fixed the prompt library not closing on Wayland --------- Co-authored-by: Junkui Zhang <364772080@qq.com>