Act as a senior product designer with 10+ years of experience in smart home devices. Design an AI-powered aroma diffuser that uses [MOOD DETECTION TECHNOLOGY] to analyze user emotions via [FACIAL EXPRESSION / VOICE TONE] and releases customized [ESSENTIAL OIL BLENDS] to enhance wellbeing. The device should feature [MODERN MINIMALIST AESTHETICS], [VOICE CONTROL INTEGRATION], and a companion app for tracking mood trends. Include detailed schematics for the emotion-sensing module, diffuser mechanism, and user interface. Highlight how the AI learns preferences over time and suggest 3 signature scent profiles for [RELAXATION], [ENERGY BOOST], and [FOCUS].