fix(pagination): align link trigger aria-label with Connect SSR

[karim-semmoud]

Summary

• Fix axe aria-prohibited-attr on link-mode pagination when prev/next are disabled <a> elements without href (page 1 prev, last page next).
• Align hook props with existing Elixir Connect SSR: dead link triggers omit aria-label; navigable links keep it for icon-only slots.
• Add corexPaginationConnect wrapper instead of patching the DOM after spreadProps.

Problem

Zag getPrevTriggerProps / getNextTriggerProps always set aria-label, but link mode only adds href when navigation is possible. On page 1, prev is <a data-disabled> with no href, which axe 4.11 rejects.

Elixir Connect already omitted aria-label for disabled link triggers on SSR. The Pagination hook used raw Zag connect, so spreadProps re-applied aria-label after phx-mounted ignore. Doc a11y tests failed on /en/pagination/patterns and /en/pagination/playground.

Button mode (default) is unaffected: aria-label on <button disabled> is valid.

Changes

corexPaginationConnect (assets/components/pagination-connect.ts)

• Wrap @zag-js/pagination connect and override prev/next getters.
• adjustDeadLinkTriggerProps: strip aria-label when props have no href and trigger is not type="button".
• assets/components/pagination.ts uses corexPaginationConnect in initApi().

Tests

• Elixir: next_trigger disabled link omits aria-label in test/components/pagination_test.exs.
• Vitest: unit tests for adjustDeadLinkTriggerProps and link-mode integration in assets/test/component/pagination.test.ts.
• Exclude *-connect.ts from component subclass contract in assets/test/component/components-contract.test.ts.

Build

• Rebuilt priv/static/pagination.mjs via mix assets.build.

Not changed

• Link mode API (type={:link}, to, redirect) kept for Phoenix patch/navigate and shareable URLs.
• Elixir Connect.prev_trigger / next_trigger logic unchanged (already correct).

Test plan

• mix test test/components/pagination_test.exs
• npm test -- pagination.test.ts
• npm test -- components-contract.test.ts
• cd e2e && mix test test/e2e_web/doc_routes_a11y_test.exs (pagination patterns + playground routes)