Order review dialog does not keep keyboard focus within the modal
User impact
Keyboard and screen-reader users can move into content behind the open dialog and lose the relationship between the review task and available actions.
Reproduction evidence
- Open the order review dialog from the payment step.
- Press Tab repeatedly after focus reaches the final dialog action.
- Focus moves to the page navigation behind the modal while the modal remains visible.
Remediation guidance
Use a native dialog implementation or a tested modal pattern. Move focus to a meaningful element when the dialog opens, constrain sequential focus while it is modal, support Escape where appropriate, and restore focus to the invoking control when it closes.
Verification requires retesting the corrected behavior in the agreed environment. A code change alone does not close the finding.