chore: update live2d url

chore: fix scrollbar home

docs: upgrade new vitepress

fix(client): optimize load animation

fix(client): scrollbar in layout

chore: upgrade deps & fix lint

chore: add sass dep

chore: remove useless dep

fix: use spa to fix build

feat: add live2d demo online

chore: upgrade deps & lint code

chore: upgrade dependencies & fix a button title

chore: upgrade dependencies

feat: add mouth animation & lip parse

docs: add solutions description