view-mermaid

View Mermaid diagrams from the current conversation in a browser. Reads each chat ```mermaid block, writes it to a .mmd file, and serves them rendered on a Tailscale-reachable HTTP server with bundled mermaid.js (fully offline). The page lists all diagrams (newest first), renders the newest by default, has light/dark toggle, copyable source, and per-diagram fullscreen with zoom + pan. The server auto-stops ~3 min after the last tab closes. Trigger with /view-mermaid.