Update llm_client.py

llm_client.py

@@ -1,10 +1,17 @@
 # llm_client.py
+from llm_prompt import SYSTEM_PROMPT, build_bayes_explanation_prompt
+from openai import OpenAI
 
-from llm_prompt import teaching_prompt
+client = OpenAI()
 
 def chat_teaching_question(question: str) -> str:
-    """
-    教學問答（目前不接任何 API）
-    只是回傳整理後的 prompt，確保系統不 crash
-    """
-    return teaching_prompt(question)
+    response = client.chat.completions.create(
+        model="gpt-4o-mini",
+        messages=[
+            {"role": "system", "content": SYSTEM_PROMPT},
+            {"role": "user", "content": build_bayes_explanation_prompt(question)}
+        ],
+        temperature=0.3
+    )
+    return response.choices[0].message.content
+