Agent FileBrowser for DeepSeek Harness

Key features

• The analysis session uses the host's default model and joins the same agent preset as a manually created session, so it gets the full standard tool set (read/write/glob/grep, shell, goal, web search, …), not just the browser tools.
• A file-browser web app for DeepSeek Harness — a React frontend and REST API served by the host webserver, plus a /dsh-agfs command and browse_files/read_file model tools.
• browse_files (parameters path, keyword, recursive) — list a directory or search entry names (optionally recursively).
• Full file browser — list/search, text preview (markdown, code, logs), image preview, and create/rename/copy/delete folders.
• /dsh-agfs command — opens the file browser in the system default browser and automatically navigates to the current session's workspace directory (session cwd)