fix(ui): preserve code spans adjacent to tildes (#35835)

packages/ui/src/context/marked-code-span.ts

@@ -0,0 +1,17 @@
+import type { MarkedExtension } from "marked"
+
+// Keep adjacent tilde and backtick runs separate until markedjs/marked#4011 is released.
+export const markedCodeSpanBoundary = {
+  tokenizer: {
+    inlineText(src) {
+      const match = /^(`+(?=~)|~+(?=`))/.exec(src)
+      if (!match) return false
+      return {
+        type: "text",
+        raw: match[0],
+        text: match[0],
+        escaped: this.lexer.state.inRawBlock,
+      }
+    },
+  },
+} satisfies MarkedExtension