UPDATE: Fix chatbot

internal/services/chatbotService.go

@@ -43,15 +43,16 @@ func (s *chatbotService) Chat(ctx context.Context, projectID *string, question s
 		prompt = fmt.Sprintf(`You are a friendly history assistant chatbot. The user said: "%s"
 
 Rules:
-- If it is a greeting (like "hello", "hi", "xin chào"), respond with a friendly greeting and briefly introduce yourself as a history assistant.
-- If it is a history question, say that you don't have relevant documents to answer and suggest they ask about topics available in the system.
-- Do NOT show your reasoning or thinking process. Output ONLY your final response.`, question)
+- If it is a greeting (like "hello", "hi", "xin chào"), respond with a friendly greeting and briefly introduce yourself.
+- If it is a history question, say that you don't have relevant documents to answer.
+- You MUST wrap your final response inside <answer> tags. Example: <answer>Hello!</answer>
+- Do NOT show your reasoning outside or inside the tags if possible, but the final answer MUST be in <answer> tags.`, question)
 	} else {
 		prompt = fmt.Sprintf(`You are a helpful history assistant. Answer the question using ONLY the provided context.
 
 Rules:
 - If the answer is not in the context, say "I don't have enough historical context to answer that."
-- Do NOT show your reasoning, thinking process, or analysis. Output ONLY your final answer.
+- You MUST wrap your final response inside <answer> tags. Example: <answer>The capital is...</answer>
 - Be concise and direct.
 
 Context:

pkg/ai/rag.go

@@ -97,12 +97,24 @@ func (u *RagUtils) GenerateResponse(ctx context.Context, prompt string) (string,
 }
 
 func stripThinking(raw string) string {
+	startTag := "<answer>"
+	endTag := "</answer>"
+	startIdx := strings.Index(raw, startTag)
+	endIdx := strings.LastIndex(raw, endTag)
+
+	if startIdx != -1 && endIdx != -1 && endIdx > startIdx {
+		return strings.TrimSpace(raw[startIdx+len(startTag) : endIdx])
+	}
+
+	if startIdx != -1 {
+		return strings.TrimSpace(raw[startIdx+len(startTag):])
+	}
+
 	if !strings.Contains(raw, "*   ") {
 		return strings.TrimSpace(raw)
 	}
 
 	lines := strings.Split(raw, "\n")
-
 	answerStart := len(lines)
 	for i := len(lines) - 1; i >= 0; i-- {
 		trimmed := strings.TrimSpace(lines[i])