Record final browser stable release cleanup

[petyosi]

Summary

• record the approved evidence PR and its exact no-publication main run
• verify the feature branch is absent and its final tree is identical to the feature squash merge
• preserve the stable and alpha registry state and document the direct-push recovery through PR Restore the reviewed R9 cleanup path #164
• leave R9 and the roadmap conditional on this PR's own exact post-merge no-publication evidence comment

Validation

• Checking formatting...

All matched files use the correct format.
Finished in 574ms on 437 files using 14 threads.

• pre-commit �[1m�[94mpass:�[39m�[0m Formatting completed for checked files �[2m(2.0s)�[0m
  �[1m�[94mpass:�[39m�[0m Found no warnings, lint errors, or type errors in 254 files �[2m(643ms, 14 threads)�[0m
• pre-push package builds and all package tests
• exact feature/squash tree comparison
• complete registry/dist-tag and stable release-ref snapshots
• evidence and recovery main runs reported no packages to publish

[petyosi]

@coderabbitai review

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@coderabbitai review

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@coderabbitai help

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@coderabbitai full review

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@coderabbitai full review

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@coderabbitai reviews remaining?

[petyosi]

Superseded because CodeRabbit produced no status, comment, or review after automatic review, reopen, new-commit, incremental-review, and full-review triggers. The cleanup remains unmerged and will be re-opened as a fresh PR without weakening the reviewer gate.