Steam Community Market Enhancer: Listing summary grouping, overpriced/underpriced detection & marking, one-click relisting (custom price + assetid re-acquisition + multi-level sessionid fallback), batch delisting, price history trends, order depth visualization (full multi-level order histogram / net-after-fees / cumulative distribution / adjustable levels / one-click refresh), owned item identification, my listings sort/search/batch operations, inventory page price labels & quick sell value summary, my listing market rank tracker (new React market pages, exact price-ascending rank, auto refresh on sales).