Drag the queue button panel onto the top actionbar to dock it, and drag the handle out (past a threshold) to float it again. Docking reuses ComfyUI's ComfyButtonGroup / actionbar `.border-dashed` reveal hook, and the mode is persisted in a cookie. The dock feature is opt-in via a new D2_FloatContainer option so the shared PromptConvert / ProgressPreview panels are unaffected. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>