fix: webchat gfm table rendering and overflow (#32365) (thanks @BlueBirdBack)

ui/src/ui/markdown.ts

@@ -2,11 +2,6 @@ import DOMPurify from "dompurify";
 import { marked } from "marked";
 import { truncateText } from "./format.ts";
 
-marked.setOptions({
-  gfm: true,
-  breaks: true,
-});
-
 const allowedTags = [
   "a",
   "b",