Feature request: Render Mermaid diagrams in Codex remote threads on Android

Summary

Please render fenced \mermaid\ blocks as diagrams in the ChatGPT Android Codex remote experience.

When reviewing a remote Codex thread on Android, Mermaid diagrams are not visible/rendered, while a standalone SVG mockup in the same thread displays correctly.

Reproduction

1. Open or continue a Codex remote thread from the ChatGPT Android app.
2. Have Codex return a fenced Mermaid block, for example:

\\\mermaid
flowchart LR
A[Design] --> B[Implementation]
B --> C[Security review]
\\\

1. Observe that the diagram is not available as a rendered visual.
2. View a standalone SVG image in the same thread; it renders successfully.

Why this matters

Mobile remote access is especially useful for reviewing work away from the host. Architecture diagrams, sequence diagrams, workflows, and security-analysis flows are common Codex outputs and are difficult to review as source text on a phone.

Suggested behavior

• Render Mermaid blocks on Android.
• Allow tap-to-open, zoom, and full-screen viewing.
• Keep the Mermaid source available with a copy action.
• If native rendering is unavailable, generate or display an SVG/PNG fallback.
• Include an accessible text description where possible.

A useful model would be: Mermaid source for editing/version control, SVG or PNG for reliable mobile viewing.

Additional context

I searched the open issues in this repository for Mermaid/Android/mobile diagram rendering and did not find an existing matching report.