feat(frontend): no LaTeX in code blocks

frontend/src/lib/utils/markdown.ts

@@ -2,8 +2,20 @@ import { Marked } from 'marked';
 
 const marked = new Marked({ breaks: true, gfm: true });
 
+const CODE_OPEN = '';
+const CODE_CLOSE = '';
+
 export function processLatex(text: string): string {
-	return text
+	const placeholders: string[] = [];
+	const stash = (match: string) => {
+		const token = `${CODE_OPEN}${placeholders.length}${CODE_CLOSE}`;
+		placeholders.push(match);
+		return token;
+	};
+
+	const protectedText = text.replace(/```[\s\S]*?```/g, stash).replace(/`[^`\n]*`/g, stash);
+
+	const rendered = protectedText
 		.replace(/\$\$(.*?)\$\$/gs, (_, tex) => {
 			const encoded = encodeURIComponent(tex.trim());
 			return `<img src="/service/latex?tex=${encoded}&display=1" alt="LaTeX" class="block my-1 max-h-12" />`;
@@ -12,6 +24,11 @@ export function processLatex(text: string): string {
 			const encoded = encodeURIComponent(tex.trim());
 			return `<img src="/service/latex?tex=${encoded}" alt="LaTeX" class="inline-block align-middle max-h-4" />`;
 		});
+
+	return rendered.replace(
+		new RegExp(`${CODE_OPEN}(\\d+)${CODE_CLOSE}`, 'g'),
+		(_, i) => placeholders[Number(i)]
+	);
 }
 
 export function processContent(text: string): string {