3936c482d9
Deduplicate the "save a workspace setting" plumbing shared by HtmlEmbedSettings and TrackerSettings (workspace atom read, isLoading state, updateWorkspace + atom merge forcing settings[key], success/error notifications) into a new feature-scoped hook useWorkspaceSetting(key). - Each component keeps its own interaction model: html-embed is an optimistic toggle with revert-on-failure; tracker is edit-then-save on an explicit button. - Unify error handling on the better pattern: surface err.response?.data?.message and use console.error (html-embed previously used console.log + a generic message). No user-facing behavior change; client typecheck clean. Test-coverage follow-ups (untested trackerHead injection in ShareSeoController and the no-op audit branch) tracked in #100.