Canvas headless frontends currently fetch rendered Canvas data through the /ce-api endpoint provided by the lupus_decoupled_ce_api module. The endpoint renders stored content during a live draft session, leaving the embedded preview stale after an auto-save. ### Proposed resolution For requests authenticated with a Canvas preview token, use the routed content entity’s auto-save data if available. Continue rendering published content for public requests and authenticated requests without the Canvas preview scope. Refresh the embedded app after auto-save changes. ### User interface changes The embedded headless preview refreshes after successful auto-saves.