Add automated accessibility coverage for an offline study guide

[HabsaTheDog]

Goal: add a deterministic accessibility regression for the single-file offline learning-page contract.

Scope:

• use a synthetic generated fixture;
• cover keyboard-only chapter navigation and interactive questions;
• check focus visibility, semantic names, heading order, landmarks, contrast-sensitive states, and reduced-motion behavior;
• keep the output fully offline and avoid adding a backend;
• report any rule exclusions with a concrete reason.

Acceptance:

• the test fails on an intentional accessibility regression;
• the test runs in the existing browser-test toolchain;
• fixture provenance is documented and contains no course or student data.

[XonkelX]

Hi! I’m interested in taking this on. I’d add a synthetic offline fixture to the existing browser-test setup, cover keyboard chapter navigation and interactive questions, and include deterministic checks for focus visibility, accessible names, headings, landmarks, reduced motion, and the relevant contrast-sensitive states. I’d also prove the test catches an intentional regression and document the fixture provenance and any justified exclusions. I don’t see overlapping work right now. Could you confirm #12 is available?