Finalize core UX and editorial flows for v1 launch

[jeffpaul]

Description

Refine and finalize all core user experience flows for the AI Experiments plugin, preparing for the first major public version to launch alongside WordPress 6.9. This includes ensuring consistency in design, accessibility, and editorial workflow integration.

Goals

• Review all admin and editor experiences for usability and clarity.
• Align visual patterns with current WordPress design direction (block and site editor styles).
• Validate that all experimental features (Title Rewriting, Excerpt Generation, etc.) follow consistent interaction patterns and language.
• Confirm accessibility standards are met across controls, labels, and notices.
• Provide a final UX spec and flow diagram documenting all user touchpoints.

Acceptance Criteria

• All UX and editorial flows are finalized and reviewed by design contributors.
• Plugin feels consistent with core WordPress admin and editor patterns.
• Accessibility checks pass using available testing tools.
• UX documentation and screenshots are added to the GitHub wiki, /docs directory, or similar location for reference purposes.

[karmatosed]

This is most likely covered by #35 and #103 so for now the focus from this should probably be the accessibility aspect.

Confirm accessibility standards are met across controls, labels, and notices.

[jeffpaul]

Much of the items here should be covered by #153, though the a11y review should likely be separate and inclusive of all plugin functionality.