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Lp (instantaneous) twitches every reading and makes a poor at-a-glance headline; Leq (energy-average) is the stable, standard sound-monitoring/compliance metric. Overview tiles now lead with Leq. Design doc: live project map (status-colored pins + current-reading popups) recorded as an M2 item; headline-metric rationale noted. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>