TikTok, which is already facing a federal lawsuit from the US Department of Justice, is now looking at legal complaints from 13 US states and the nation’s capital, Washington DC. Attorneys general in those districts filed lawsuits against the Chinese-owned social media giant on Tuesday, alleging it designed the video platform intentionally in a way that makes children and teenagers want to spend more and more time there. This, they assert, harms their well-being. TikTok denied the allegations. The lawsuit highlights features like the ability to scroll endlessly with auto-playing videos. The pr…