dsh-todo-dock: Pin the DSH Web todo panel to the top-right corner, so it doesn't disappear across wheels.

dsh-todo-dock is a DSH Web GUI plugin (author lsxblh, MIT license, current version v0.3.2) that solves two major pain points of the native todo panel: the panel occupying the document flow and squeezing the input area, as well as the issue where `turn/start` clears the todo projection, causing the panel to disappear. It is a...