fix(pagination): align web component with React for parity

[heloiselui]

Closes #19870
Closes #20265

Align <cds-pagination> web component with React version for feature parity and consistency.

Changelog

New

• None.

Changed

• Updated _renderStatusText
• Updated updated() lifecycle to:
  • Recompute totalPages when relevant props change (pageSize, start, totalItems, page)
  • Clamp requested page to safe range
• Improved prev/next button disable logic
• Fix accessibility
• Storybook stories to use args consistently
• Updated <cds-select> for page dropdown to set the correct selected item
• Minor style fix in button.scss focus state to fix a small design bug

Removed

• Duplicate/unnecessary page select rendering logic in stories
• Removed non-visual controls from Storybook

Testing / Reviewing

• Go to Web Components Deploy Preview > Pagination
• Play around the default story and try to compare the components to make sure no missing features are present.

PR Checklist

As the author of this PR, before marking ready for review, confirm you:

• Reviewed every line of the diff
• Updated documentation and storybook examples
• [ ] Wrote passing tests that cover this change
• Addressed any impact on accessibility (a11y)
• Tested for cross-browser consistency
• Validated that this code is ready for review and status checks should pass

More details can be found in the pull request guide

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.83%. Comparing base (30b4f87) to head (e194da3).
⚠️ Report is 173 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #20459      +/-   ##
==========================================
+ Coverage   91.39%   91.83%   +0.43%     
==========================================
  Files         485      480       -5     
  Lines       31370    32409    +1039     
  Branches     5430     5434       +4     
==========================================
+ Hits        28670    29762    +1092     
+ Misses       2547     2501      -46     
+ Partials      153      146       -7     

Flag	Coverage Δ
main-packages	85.03% <ø> (+0.09%)	⬆️
web-components	97.26% <ø> (+0.10%)	⬆️

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[maradwan26]

Looks good! Just some comments:

• Default Story: when pagesUnknown = true, the pagination still caps out and stops increasing the pages when it reaches totalItems. In React it lets you keep going forever even when u have totalItems="some number" but pagesUnknown = true, pagesUnknown seems to override totalItems in the React Default Story

  React:
  

  WC:
  

• "Unknown pages and items" story is broken

[heloiselui]

Looks good! Just some comments:

• Default Story: when pagesUnknown = true, the pagination still caps out and stops increasing the pages when it reaches totalItems. In React it lets you keep going forever even when u have totalItems="some number"

@maradwan26 Thank you for reviewing my PR, I believe everything is all set now.

[maradwan26]

Thx! LGTM