- ast-parser: read for_value= prop for sub-variations (was always null,
causing fallback to positional "subvariation N" label)
- StatusPoller: calculate progress from currently_rendered_notes /
notes_in_total; show remaining_time string from status.json
- ShapeEditor/EnvelopeEditor: pass { undo } through onChange so callers
can revert in-place mutations
- PaneFO: makeChangeHandler stashes undo from info arg; discardEdit
calls undo() before clearing pendingEdit; depends_on handler provides
its own undo for the inline node.dependsOn mutation
PaneCP: replace horizontal breadcrumb with vertical list of short views
for each node in the focus path (type tag + label/identifier). Clicking
any item above current navigates up.
PaneFO: show score info fields (title, composer, source, encrypter) as
editable DL when at score level instead of 'Nothing selected'.
AppShell already wraps each component in div.se-pane; the inner se-pane
had display:none without .active, hiding all content.
Also drop stale movement/part/line/measure bar fields (bar IDs are opaque).
