fix(css): read a block's at-rule name with the shared helper when ordering declarations - #22590

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Latest commit: a28dbc7

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No actionable comments were generated in the recent review. 🎉

Priority: ➖ Normal

Change: Bug fix

Merge Risk: ⚪ Minimal · up to a28db

The declaration-order fix matches the parser’s at-rule classification, with tests covering nested media ordering and font-face descriptor preservation. No concrete merge-blocking risk remains.

🚥 Pre-merge checks | ✅ 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title uses the required Conventional Commit format, fix(css): subject, and accurately describes the change to at-rule name lookup during declaration ordering.
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

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This PR is packaged and the instant preview is available (a7e5a84).

Install it locally:

• npm

npm i -D webpack@https://pkg.pr.new/webpack@a7e5a84

• yarn

yarn add -D webpack@https://pkg.pr.new/webpack@a7e5a84

• pnpm

pnpm add -D webpack@https://pkg.pr.new/webpack@a7e5a84

Types Coverage

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.19%. Comparing base (a3232d2) to head (a28dbc7).
⚠️ Report is 2 commits behind head on main.

@@            Coverage Diff             @@
##             main   #22590      +/-   ##
==========================================
+ Coverage   95.54%   96.19%   +0.64%     
==========================================
  Files         774      774              
  Lines      128230   128374     +144     
  Branches    42484    42525      +41     
==========================================
+ Hits       122514   123485     +971     
+ Misses       5716     4889     -827     

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Generated code size

Comparing base (a3232d2) to head (a28dbc7). Merging this pull request changes the size of 34 asset(s) whose tests it leaves untouched and moves 1 asset(s) whose tests it edits too.

Read Changed, test untouched first: the test is byte-identical on both sides, so webpack generated the difference. Changed, test edited moved partly because the test did — Test edit is how many bytes the test gained, and a bundle that grew by less is not a regression. New and Deleted are whole files, not deltas — a new asset was created, not grown, so it reads gray (⚪ added) — and adding tests cannot bury a real change. Gzip decides, because that is what users download; raw is the tiebreak, and brotli and zstd are per asset below.

No runtime gained or lost a runtime module.

Built test/configCases with the defaults a user gets: 2207 test(s), 8450 asset(s), 99 emitted nothing.

Merging this PR will not alter performance

✅ 406 untouched benchmarks
⏩ 6 skipped benchmarks¹

_{Comparing fix/css-at-rule-declaration-order (a28dbc7) with main (8953192)}