- Fix SMS provider dropdown: switch from nonce'd javascript_tag to inline
onchange handler (Turbo-compatible)
- Fix enable toggle: handle serialized JSON string values ("true"/"1")
in addition to boolean true
- Fix landing page: change link text from github.com/docusealco to
github.com/wabolabs/wabosign
- Add comprehensive SMS system tests (4 examples) covering provider
form rendering, toggle, enabled state, and test message section