View Filled Placeholders in Document Viewer

The Document Viewer now supports placeholders, making it easier to track placeholder activity alongside standard document history. When a placeholder already has a file uploaded, users can open it in the Viewer to review the file and see its history; empty placeholders still can’t be opened. The Viewer experience is read-only for placeholders—users can view the placeholder and its history, but can’t edit placeholder metadata there. Change History is also expanded to capture key placeholder lifecycle events, including placeholder created, placeholder updated, file uploaded into placeholder, and file removed from placeholder. Once a file is uploaded, the same history continues seamlessly as the placeholder transitions into the normal document history flow—improving traceability, reducing confusion during handoffs and reviews, and maintaining a clearer audit trail as placeholders evolve into submitted documents.