DeFeedback Live 0.3.0

HISTORICAL PRIVATE PREVIEW - SUPERSEDED BY v0.4.0.\n\nThis archive predates the public open-source release, current safety notice, and packaged licence/source information. Do not use it for new testing; download the latest public preview instead.\n\nOriginally clarified STOP ENGINE and MUTE ALL OUTPUTS, added colored lane states, aligned shared lane geometry, widened Strength controls, and added isolated no-audio UI QA. Ad-hoc signed and not notarized.