feat(widget-context-menu): keyboard navigation for context menu popover (Up/Down/Enter/Esc)

[rubenvdlinde]

Follow-up to #36 (widget-context-menu)

The v1 context menu (PR #73) is mouse-only by design. This issue tracks the keyboard navigation enhancement deferred from v1.

Scope

• Arrow Up/Down should cycle focus through the three menu items (Edit → Remove → Cancel → wrap)
• Enter should activate the focused item
• Esc should close the popover and return focus to the widget that was right-clicked
• Tab should close the popover and follow normal browser tab order
• Focus should be trapped inside the popover while it is open

WCAG Compliance

Relevant WCAG 2.1 success criteria:

• 2.1.1 Keyboard (Level A): all functionality available by keyboard
• 2.1.2 No Keyboard Trap (Level A): focus can leave the popover via Esc

Deferred because

v1 is purely additive UI for mouse users. Keyboard support adds focus-trap complexity that would increase the spec size beyond the L1 sizing budget for this change.

Ref: openspec/changes/widget-context-menu/tasks.md Task 12

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Gemigreerd van Codeberg — oorspronkelijk Conduction/launchpad#74, geopend door al-gorithm-con op 2026-06-04.

[github-actions]

Thank you for opening this issue! It has been assigned to @rubenvdlinde for review.

What happens next:

1. A maintainer will review this issue and determine the appropriate action
2. If accepted, it may be converted into an OpenSpec change for structured development
3. You will be notified of any status changes

Triage labels:

• triage:accept-feature — accepted as a new feature
• triage:accept-bugfix — accepted as a bug fix
• triage:needs-info — more information needed
• triage:wontfix — will not be addressed
• triage:duplicate — duplicate of another issue