dsh-mermaid-zoom

Viewing Mermaid diagrams rendered by dsh-genui inside the DeepSeek Harness Web GUI often hits a frustrating wall: the chart is too small to read, zooming into a detail means refreshing the page, and exporting a clean image for a slide deck requires a manual screenshot and post-processing. dsh-mermaid-zoom plugs exactly that experience gap as a purely client-side enhancement that attaches the moment a diagram finishes streaming, with zero backend involvement.

Once active, a full interaction suite appears automatically. Hold Ctrl or Cmd and scroll to zoom smoothly between 0.4× and 10× without hijacking page scroll; click and drag to pan around the canvas; double-click anywhere to snap back to the initial view. A small floating toolbar fades in on hover, offering one-tap zoom-in, zoom-out, and reset buttons for users who prefer mouse-only workflows. When it is time to share, a single click exports the diagram as a 2× resolution, white-background PNG straight to the system clipboard, with an automatic browser download as a fallback if clipboard access is blocked.

The plugin ships no server component and adds no external runtime dependency—every line executes in the browser DOM layer. If you regularly read, explain, or screenshot Mermaid flowcharts, sequence diagrams, or architecture diagrams inside the DSH Web GUI, this small addition turns a static image into an interactive canvas.