fix(menubar): address review feedback for #889

[VailElla]

Summary

Addresses all seven unresolved review findings on #889 without expanding the parent PR behavior:

• keep gesture drag coordinates consistent and move the landing query outside the event semaphore;
• reclassify sections after every H_ctrl attempt before AH_ctrl and fallback planning;
• remove remaining retired-setting references and fix the two review-found test issues.

Parent PR

This is a stacked PR targeting fix/menubar-reliability. Merge this first, or cherry-pick commit 730e1715, so #889 receives the fixes without unrelated history.

Closes: N/A

Validation

• Xcode 27 Beta 4: 1961 tests in 253 suites passed on exact commit 730e1715
• focused regression: 35 tests in 6 suites passed
• swift build --package-path ThawCtl
• Swift parse, SwiftFormat on the changed non-core files, and git diff --check
• DCO sign-off and GitHub noreply identity verified

Risk and rollback

No persisted-data migration or default-setting change. The gesture option remains off by default. Roll back by reverting 730e1715.

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[github-actions]

Labels: menubar

All convention checks passed. ✅

cc @VailElla

[diazdesandi]

👍