Perform a keyboard, contrast, and screen-reader accessibility pass

[darkbyte-JS]

Goal

Audit the profile gate, navigation, inputs, dialogs, TOTP list, and settings in Light, Dark, and Aurora.

Acceptance criteria

• Document keyboard-only order and visible focus.
• Check profile/ComboBox selected and hover states in all themes.
• Test Windows Narrator labels for controls and status changes.
• Record contrast failures and submit focused fixes with screenshots using synthetic data.