Backend zh-CN /api/categories now returns two new categories:
id=17 slug=contract-address (合约地址)
id=18 slug=data-records (数据收录)
Export the matching gold-tone PNGs from Figma and wire them into
slugToAsset so CategoryIcon serves the branded artwork instead of
falling back to the lucide iconKey (folder / play). en locale still
returns 13 categories, so English users will pick this up once the
backend ships translations for the two new entries.
