tea has been replaced by [gitea-cli](https://gitea.com/gitea/cli)
(`gt`), which reuses tea's OAuth2 client ID.
- The repository clone panel now offers `gt repo clone owner/repo` under
a "Gitea CLI" tab.
- The built-in OAuth2 application is renamed from `tea` to `gitea-cli`.
`tea` in `[oauth2] DEFAULT_APPLICATIONS` is still accepted as an alias,
so existing configs keep working.
- Instances that already registered the app keep its stored display name
"tea".