Mind-map sub-skill (orchestrated by study-assistant; also usable standalone). Use whenever a chapter knowledge-point mind map needs to be generated or refreshed — the user says "思维导图" "知识图谱" "脑图", or any knowledge point's mastery/status changed. Renders knowledge.json into a zero-dependency offline-
Mind-map sub-skill (orchestrated by study-assistant; also usable standalone). Use whenever a chapter knowledge-point mind map needs to be generated or refreshed — the user says "思维导图" "知识图谱" "脑图", or any knowledge point's mastery/status changed. Renders knowledge.json into a zero-dependency offline-capable interactive HTML with collapse/expand, drag/zoom, search, and mastery coloring.