fix(review): describe recorded-operation fallbacks honestly

[Chris0Jeky]

Summary

• make the Legacy terminal-review banner describe the actual content mode
• say “recorded operations” for the local fallback and “no stored preview is available” for an empty terminal record
• preserve the original-submission wording when a real stored preview is present

The PaperReviewView counterpart is intentionally out of scope because its shared path is leased by open PR #2629.

Verification

pm test -- --maxWorkers=2 src/tests/components/review/ReviewProposalCard.diff.spec.ts — 21 passed

pm run typecheck — passed

• scoped ESLint — passed
• git diff --check — passed

Refs #1434

[chatgpt-codex-connector]

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[Chris0Jeky]

Review gate (Codex review credits exhausted, SC-9; D-12 ruled 2026-09-05: the Codex session's PRs are reviewed and merged by the coordinator): one fresh-context read-only reviewer (Opus 5) on head e9858f0d2. Verdict: SHIP.

Checked by reading: the three wording branches of readOnlyDiffBanner map exactly to the three template modes (selectedDiff, storedOperationsFallback, the empty span) with the same truthiness tests; the banner renders only under selectedDiffMode === 'stored'; the status prefix still reads isExpired; no i18n key added or changed (this Legacy card is hardcoded English throughout, and the localized Paper counterpart is untouched, consistent with the body deferring it to #2629); the two new not.toContain assertions fail on revert; no new em dash beyond the preserved pre-existing prefix.

Findings and disposition:

• LOW, tracked on #1434: the fallback banner now repeats the note rendered directly below it.

Issue disposition: slice of #1434 (Legacy card only); the Paper surface still shows the unconditional banner in all three locales.