Round 1 caught every throw from restoreImageOriginal() and reported it as a 404, on the theory that losing the concurrent-restore race is the only way that call fails. But the throw carried nothing to distinguish that race from a genuinely different failure during the same UPDATE — a dropped database connection, a transient outage — so a real failure was now silently reinterpreted as "someone already restored this" instead of surfacing as the loud 500 it was before.
backend/src/intake/backgroundRemoval.ts now exports NoOriginalToRestoreError, a named subclass of Error thrown in place of the bare Error restoreImageOriginal previously threw. The message text is unchanged, so backgroundRemoval.integration.test.ts's rejects.toThrow(/no original/) assertion keeps passing without modification.
backend/src/routes/adminItemDrafts.ts catches that class specifically in the restore-original handler and rethrows anything else, so a real failure still reaches the app-level error handler and comes back as a 500 instead of being mislabeled as "already done".
backend/tests/integration/adminItemDrafts.integration.test.ts adds a test that spies on restoreImageOriginal via jest.spyOn on the module namespace (the project compiles to CommonJS, so the route's call site reads the export off that object at call time, which makes the spy effective without jest.mock) to reject once with a plain Error, and asserts the response is 500 rather than 404 — proving the narrowing changes real behavior, not just internal structure. The spy is restored in a finally block.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
bermudalambandClaude Opus 5
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