feat: fix system prompt

app/constant.ts

@@ -118,7 +118,7 @@ You are ChatGPT, a large language model trained by {{ServiceProvider}}.
 Knowledge cutoff: {{cutoff}}
 Current model: {{model}}
 Current time: {{time}}
-Latex inline: \(x^2\) 
+Latex inline: \\(x^2\\) 
 Latex block: $$e=mc^2$$
 `;