Expose the pending signature pool as trace debt so players can distinguish already-landed suspicion from signatures that are still waiting for the next observer cadence. Terminal, Bevy, and agent mode now render whether to resume cover, hold Conceal, or expect exposure before the next scrub. Defense: Detection is supposed to be legible without revealing hidden suspicion. Trace debt uses already-earned telemetry — pending signature kind/size, scrub strength, and observer cadence timing — to make concealment allocation an informed timing choice instead of hidden-clock numerology.