P17: add the missing tutorial DOM layer CSS (#annot chips / §C.4 cards / handoff)

Deploy v42: long-board redesign (style.css)

deploy v32: board legibility (you-agent salience, recessive hazards, near-zero text)

deploy v28: lives/survival axis

♥ lives + elimination, no-goal solo memory + rewind, newcomer UX, terrain-rule heart fix

online human-vs-human (PeerJS, no bot) + 3-rule cut + strengthened memory

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initial commit