The journal now owns command history and tracking, so retire the md-commander widget. Its dice engine was extracted to src/components/dice in the previous commit.
Removes the custom element, tracker/command stores, completions, useCommander, Emmet parser, the doc entry, test fixtures, and the known-element catalog entry (reference docs regenerated).
BREAKING CHANGE: :md-commander is no longer a known element; content using it now fails tttk check with TTTK-D001.
Drop legacy yaml/tag info string; tag blocks now require
```yaml role=tag. Add fence-line tag=/id= attributes that
override YAML body values, and move parseBlockAttrs to
src/markdown/block-attrs.ts so scanner and render extensions
share one parser.
Accept yaml role=tag alongside legacy yaml/tag so the block
body gets yaml syntax highlighting, matching the CLI role=
attribute convention. Copy button now emits the role=tag form.
Add a unique `_key` to each layer config to maintain stable sortable IDs
across reorder operations. Update LayerRow to use the sortableId prop
and the `use:sortable` directive. Refactor layer-crud utilities to
generate and propagate `_key` values on creation and initialization.
hyper
hypercross
hyper