ui: Mermaid Diagrams in chat + interactive preview (#24032)

tools/ui/src/lib/constants/index.ts

@@ -15,6 +15,7 @@ export * from './cache';
 export * from './chat-form';
 export * from './cli-flags';
 export * from './code-blocks';
+export * from './icons';
 export * from './code';
 export * from './context-keys';
 export * from './control-actions';
@@ -26,6 +27,7 @@ export * from './icons';
 export * from './latex-protection';
 export * from './literal-html';
 export * from './markdown';
+export * from './mermaid-blocks';
 export * from './max-bundle-size';
 export * from './mcp';
 export * from './mcp-form';