OAKLAND, Calif. — A former engineering director at Meta Platforms testified on Wednesday that CEO Mark Zuckerberg fostered a culture that treated child safety as secondary to growth and engagement on Facebook and Instagram. Arturo Bejar, a vocal Meta critic, made the allegation during his second day of testimony in a landmark trial over claims brought by a coalition of states that could reshape Facebook and Instagram, some of the most popular apps on the planet. California, Colorado, Kentucky and New Jersey accuse Meta of designing the platforms to hook young users, fueling anxiety, depression and even suicide, and misleading consumers about their safety. Those states and 25 others also accuse Meta of violating federal law by improperly collecting and using personal data of children under 13 while they used its platforms. The trial began on Tuesday and is expected to last six weeks. Zuckerberg is expected to testify. Bejar, the states' first witness, said Zuckerberg was closely involved in much decision-making, and the company's top-down culture ensured that product design changes wo