explorer: language selector (10 langs, native-prompt runs) + per-model show/hide toggle chips

article: icon hero + dataset explorer + audit pass

article: interactive research piece for OptimismBench

feedback: add gradation Table 1 (row tint by |Skew|), unify data to headline values, hero now shows Anthropic-pessimist vs optimist contrast clearly

OptimismBench interactive article (agentroom-based, no forced 3D)