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The decode EventSource silently retried on 404 leaving the status stuck on "Waiting for server decode". Probe /decode first to distinguish 404 (audio disabled) from real SSE errors and update the APRS/CW status text accordingly. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> Signed-off-by: Stanislaw Grams <stanislawgrams@gmail.com>