Tenniarb 2.1.0

An agent's edit waits for the human now: the window shows it as edited and the file is written only when you
save, so nothing changes on disk behind your back. Switching elements in the outline keeps the zoom, and the
browser editor zooms with two fingers on a touch screen.

• An edit an agent makes through MCP stays unsaved: one undo step in the window, the title says "Edited", and
  the file on disk is written by Save (or by closing the window with the edits kept), never by the autosave.
• The outline keeps the zoom as it switches elements, and each element returns to the viewport it was left in;
  only the first element of a document is fitted to the window.
• A file an agent edits opens in the window: an edit of a file no window shows opens it with Follow on, so
  the work is never out of sight. Settings turns this off with "Open files an agent edits".
• The design skill tells an agent to change a file with edit, not with its own file tools: a change made
  behind the app has no undo step and the window cannot show it to you.

• The browser editor, the live demo of the site, zooms with a pinch: two fingers over the canvas, one finger
  still pans it.
• Check for Updates: a build from a source checkout no longer compares as a version older than a release, and
  a tag of digits only is not taken for a version.