Add explicit current-group and root creation menus. Clear the management
tree selection on blank clicks or Escape while focused. Capture creation
parents, retain failed group drafts, and select/reveal created nodes.
Validation: 870 hostless tests (921 executions), 21 Python checks, unsigned
app build, format/lint/diff checks. Standards and spec reviews passed.
Native interaction and visual verification were not performed per request.
Qiu Yuzhou