Medium-confidence a11y fixes: landmark labels and pager headings

[accesswatch]

Summary

• Medium-confidence accessibility template improvements focused on landmark uniqueness and heading structure.
• Introduces distinct navigation labels for menu blocks to reduce duplicate landmark naming.
• Aligns pager hidden heading semantics with section-level heading structure.

Changes

1. themes/custom/az_barrio/templates/blocks/block--system-menu-block.html.twig
   • Uses context-aware aria-label (e.g., mobile context) on <nav>.
2. themes/custom/az_barrio/templates/blocks/block--az-barrio-sidebar-menu.html.twig
   • Uses context-aware aria-label (sidebar/mobile context) on <nav>.
3. themes/custom/az_barrio/templates/navigation/pager.html.twig
   • Switches pager landmark to aria-labelledby + upgrades hidden heading from h3 to h2.
4. themes/custom/az_barrio/templates/views/views-mini-pager.html.twig
   • Switches mini pager landmark to aria-labelledby + upgrades hidden heading from h3 to h2.

Impact

• Impacted files: 4
• Directly targeted rule areas: landmark-unique, heading-order
• This PR is scoped as medium-confidence and intentionally avoids broad structural rewrites.

[Copilot]

Pull request overview

This PR improves accessibility semantics in the az_barrio theme by making navigation landmark labels more distinct and aligning pager headings with section-level heading structure.

Changes:

• Adds context-aware aria-label values to menu block <nav> elements.
• Updates full and mini pager landmarks to use aria-labelledby.
• Promotes pager hidden headings from h3 to h2.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
themes/custom/az_barrio/templates/blocks/block--system-menu-block.html.twig	Builds a contextual navigation label for system menu landmarks.
themes/custom/az_barrio/templates/blocks/block--az-barrio-sidebar-menu.html.twig	Adds sidebar/mobile context to sidebar menu landmark labels.
themes/custom/az_barrio/templates/navigation/pager.html.twig	Uses the hidden pagination heading as the nav label and updates heading level.
themes/custom/az_barrio/templates/views/views-mini-pager.html.twig	Applies the same pager landmark and heading semantics to mini pagers.

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