Session Files

Description

Session file upload for the DeepSeek Harness Web UI: an attach button lets the user upload arbitrary files (not just model-native images); files land in the session workspace under uploads/<sessionId>/, and an injected in-session note tells the model which directory belongs to this session; a share_session_file tool lets the model hand files to the user as clickable download cards inline in the conversation. Since 0.3.0 the upload entry yields to the built-in uploader when the harness ships one (dsh >= 0.1.5). Since 0.4.0 the plugin also adds its own download link to the new 0.1.5 surfaces that only open files: a Download item in the delivered-file card's action menu (taking over that caret when a desktop-less Host disables the built-in menu) and a per-row download button in the right Sidebar's file browser. 0.4.1 is a bug-fix release: the 0.4.0 failure toast function was named `notify`, which shadowed the store's own `notify()` in the same bundle scope and made every store update append an empty red toast at the bottom of the page while silencing store subscribers. 0.5.0 makes the whole host half world-agnostic: every workspace read/write/delete now goes through the official filesystem seam (ctx.fs) and the subprocess seam instead of node:fs, so the plugin works identically in a local workspace and in a remote SSH workspace (where the session cwd only exists on the far side); a node:fs fallback is kept for hosts that ship no ctx.fs.