improve copilot + fix minor bugs

backend/ai/src/index.ts

@@ -19,7 +19,7 @@ export default {
 				{
 					role: "system",
 					content:
-						"You are an expert coding assistant. You read code from a file, and you suggest new code to add to the file. You may be given instructions on what to generate, which you should follow. You should generate code that is correct, efficient, and follows best practices. You should also generate code that is clear and easy to read. When you generate code, you should only return the code, and nothing else. You should not include backticks in the code you generate.",
+						"You are an expert coding assistant. You read code from a file, and you suggest new code to add to the file. You may be given instructions on what to generate, which you should follow. You should generate code that is CORRECT, efficient, and follows best practices. You may generate multiple lines of code if necessary. When you generate code, you should ONLY return the code, and nothing else. You MUST NOT include backticks in the code you generate.",
 				},
 				{
 					role: "user",