fix: prevent pagination buttons from submitting forms

[sridharkalaibala]

Problem

Pagination buttons default to submitting their surrounding form. A grid embedded in a form can change page and then immediately submit/reload the page, including when an ellipsis is clicked.

Change

Set type="button" on every pagination button: previous/next, page numbers, first/last shortcuts, and both ellipses. No event suppression or changes to page-selection logic are needed.

Fixes #1248. The earlier #1268 was closed without merging; the issue remains on current master.

Validation

• Added three regressions that mount pagination in a real jsdom form at the first, middle, and last page and use native DOM .click(). All three fail before the fix because submit events fire, and pass afterward.
• The tests also verify that previous/next clicks still produce the expected page data.
• Full Jest suite: 195 tests and 36 snapshots pass across 34 suites.
• Snapshot changes were checked against upstream: only type="button" attributes were added.
• Changed-file ESLint, Prettier, and git diff --check pass.
• Browser E2E and the complete bundle build were not run. No dependency or lockfile changes.