BANGKOK (AP) — Asian shares were mixed Tuesday after U.S. stocks slumped on heavy selling of shares in companies that could be losers in the artificial-intelligence boom . U.S. futures climbed and oil prices also gained. Tokyo’s Nikkei 225 index surged 0.9% to 57,354.14 as computer-chip related companies advanced. Chip testing equipment maker Advantest was up 4.6%, while machinery maker Disco Corp. added 2.2%. Markets in mainland China gained more than 1% as they reopened following a weeklong