[Frontend][Review] Pair operation headlines by sequence

[Chris0Jeky]

Summary

• Sort a copied operation list by sequence before pairing it with presentation headlines.
• Preserve the incoming proposal operation order.
• Add a focused regression for reversed operation payload order and generic MoveCard headline enrichment.

Verification

• npx vitest --run --maxWorkers=2 src/tests/components/review/ReviewProposalCard.diff.spec.ts (20/20 passed)
• npx eslint src/components/review/ReviewProposalCard.vue src/tests/components/review/ReviewProposalCard.diff.spec.ts
• npm run typecheck
• npm run build
• Negative control: the focused regression failed against the old index-based implementation and passed after restoring the fix.
• git diff --check

Refs #2563

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[Chris0Jeky]

Coordinator note (2026-09-05 02:45Z): this PR overlaps PR #2609 (branch issue-2563/headline-operation-pairing, closes #2563, fresh-context review SHIP, opened by the alpha lane under its claim on #2563). Two PRs on the same seam cannot both merge. Whichever session opened this PR: please close it in favour of #2609, or post on #2563 why this one should be preferred before either merges.

[Chris0Jeky]

Closed as superseded (coordinator, 2026-09-05 03:16Z), per the ruling recorded on #2563 at 03:05Z: PR #2609 merged at e5612e8 and closed #2563 by sorting operations by Sequence at the source (AutomationProposalService) plus the frontend pairing regression, so the client-side re-sort here no longer has an issue to close. This PR carried no lane claim and no review. Branch left in place; reopen with a note on #2563 if it adds something #2609 lacks.