fix(ui): clip drawSacred hatch to cell; document Pareto/heatgrid panel intent

Prepare Agentness Arena v2 static Space

llm: browser spectate mode — LLM plays the human path (memPredict/humanMove); mock/anthropic/ollama

redesign: incentive-compatible metric + factorial RxGxE + peer rule-following MCTS + swap + fidelity fixes (Discovery/opponent-invariance/C*)

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initial commit