• fix condition extraction across all plotting functions: condition names are now extracted from run_info params (authoritative source) instead of fragile _extract_conditions_from_key() string-splitting, which was broken for multi-word con
  dition names (e.g. "Pre-treatment", "Wild Type"). Affected functions: plot_gene_expression, volcano_da, volcano_de, multi_volcano_da, direction_barplot
• silent fallback to pattern-matched layers/keys from potentially wrong runs has been replaced with explicit warnings in plot_gene_expression and volcano_de (FDR/PTP key inference)