## label (`poetry_label`)

An accessible caption bound to a form control.

Class: Poetry::Ui::Label::Component - BEM block `poetry-ui-label`.
- `for_id:` (string) - The id of the control this label names; omit it for a group label (the group then points at this label via aria-labelledby).
- PART `label` - The <label> element itself - for= rides it (dropped in group mode, where the group names itself via aria-labelledby at this label's id)
In blocks: `data-index` - for a screen, start from the block (MCP compose/describe_block, or `bin/rails g poetry:block`), not from scratch.
- RULE: Every control gets a Label wired via for_id - placeholder text is never the label.