GSoC 2026: Scaling Documentation Interactivity via JupyterLite

[natinew77-creator]

This issue tracks the milestones for my GSoC 2026 project: adding "Try in Browser" interactivity to the MNE-Python documentation using JupyterLite.

I'll break the work down into smaller PRs as we go, but here is the rough roadmap:

• add basic JupyterLite GitHub Actions workflow (ENH: Add JupyterLite CI/CD infrastructure #13925)
• hook up sphinx-gallery to build the JupyterLite site
• switch the wasm kernel to xeus-python to handle our dependencies better
• figure out wasm wheel patches for any tricky MNE dependencies
• test core imports and basic plotting inside the browser
• get 3D rendering (PyVista/Trame) working in the browser outputs
• update a few high-priority tutorials to use the new interactive format
• wrap up docs and final CI polish