fix: improve markdown rendering in the chat panel#49

Dong1017 wants to merge 6 commits intovigo999:refactor-arch-4.31vigo999/mindspore-code:refactor-arch-4.31from

Dong1017:refactor-arch-4.31_feat_markdown_renderDong1017/mindspore-code:refactor-arch-4.31_feat_markdown_renderCopy head branch name to clipboard