`CommandInput` sets `aria-expanded` to a boolean

• Where: command_input.rb, aria_expanded: true. Snapshot
  command/dialog line 18.
• Effect: same root cause as item 2; listed separately because the fix
  is a real state string ("false" at rest, toggled by the controller),
  not just "true".
• Fix: aria_expanded: "false" and have command_controller.js set it;
  re-record (on the 2.0 line) command/*.

Surfaced by the golden HTML suite (PR #536), which pins what 1.6 renders today — this defect included. Per maintainer decision (2026-09-19) main stays as is: this is addressed on the 2.0 line, and the golden snapshot that pins it is re-recorded there with the diff reviewed.

Source: design/v2/follow-up-issues.md.

Inizia in command_input.rb, in corrispondenza di aria_expanded, e ispeziona command_controller.js per l’aggiornamento dello stato. Esegui la golden HTML suite o il command/* snapshot, quindi registralo nuovamente sulla linea 2.0 e rivedi il diff. Il lavoro è completato quando lo stato di riposo e lo stato gestito dal controller usano le stringhe ARIA previste senza modificare la linea 1.6.