The network-error wrapping added in the error-boundary work also caught
deliberate AbortController cancellations and turned them into a network_error
ApiError, breaking callers that distinguish "cancelled" from "failed" (the
cancellable admin fetches). Rethrow DOMException AbortError unchanged; only
genuine network failures become ApiError(status 0).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>