Summary

Preview mermaid syntax as images via local rendering in DSH Web when the chat message contains a mermaid fenced code block (```mermaid or ```mmd ).

Selected features:

Preview mermaid diagram by rendering image directly!
Local renderer first!
Setting card: you can adjust runtime settings in the UI - no restart needed.
Mount point: conversation.chat.turnTail (chain slot, additive - never
shadows shipped UI).
Thumbnail display: the diagram renders as a thumbnail; click to enlarge in place, click again to shrink back (same element toggles, no popup).
Light/dark themes follow the UI automatically.

Changes

$ npx @deepseek-ai/dsh plugin --profile web add github:baconbao/dsh-mermaid-image-preview#v0.3.1

$ dsh plugin --profile web remove @baconbao/dsh-mermaid-image-preview