[Feature Request] Cowork projects: GitHub-synced files aren't individually browsable (only RAG-searchable)

When a GitHub repo is added as a sync source to a Cowork project, its files are chunked into the project's knowledge base for search/retrieval, but never appear as individual entries in docs/files — unlike locally-uploaded files or Claude-authored project docs, which are individually browsable/clickable in the Context panel. Clicking the synced-repo chip in the UI just returns to the project view; there's no way to open a specific synced file's full content directly in the UI. Expected: same click-into-file browsing experience for GitHub-synced content as for local/native project docs.