Convert captcha vendor templates and DOM selectors from id-based tianai naming to class-based captcha naming.
Update the shared captcha container, common tips/loading helpers, and slider/rotate/concat/disable/image-click implementations so template markup, DOM queries, and less selectors stay aligned.
Keep captcha.js as the single style entry for the captcha module and remove per-component less imports from the submodule JavaScript files.
sookie