Sandbox:// download links fail in Projects but work in regular chats

Bug Description File download links generated via the ipython tool (format: sandbox:///mnt/agents/output/filename) work correctly in standalone chat sessions, but fail to trigger an actual download when the conversation occurs inside a Project.

Steps to Reproduce

  1. Start a conversation inside a Project (not a standalone chat).

  2. Ask the model to generate any downloadable file (e.g., an HTML file or a chart via ipython).

  3. The model returns a link in the format: [filename](sandbox:///mnt/agents/output/filename).

  4. Click the link.

  5. Expected: Browser initiates a file download.

  6. Actual: Nothing happens. The link is non-functional.

Additional Context

  • The same sandbox:// link works perfectly in a regular (non-project) chat session.

  • This suggests the issue is specific to the Project session context, not the link generation itself.

  • Affects all file types generated by the model (HTML, PNG, CSV, etc.).

Environment

  • Platform: Kimi Chat Web

  • Context: Project session

  • Link format: sandbox:///mnt/agents/output/...