fix: Integrated Lab panels not rendering, Stop button disabled, model select ID mismatch

fix: move Integrated Lab card to last position on homepage

feat: add Integrated Lab page, app-header component, activation explainer, and UI improvements

chore: rename project to TokenTrace and set default language to Chinese

feat: add Tiny-NLA activation explanation with trained model weights

fix: replace private kuaishou npm registry URLs with public npmjs registry

init: TokenTrace - LLM interpretability toolbox