fix: disable thinking

src/ai_client.py

@@ -55,6 +55,7 @@ def summarize_email(ai_cfg: AIConfig, recipient: str, subject: str, sender: str,
 
     payload = {
         "model": ai_cfg.model,
+        "thinking": {"type": "disabled"},
         "messages": [
             {"role": "system", "content": SYSTEM_PROMPT},
             {"role": "user", "content": content},
@@ -77,6 +78,7 @@ def expand_promo_detail(ai_cfg: AIConfig, sender: str, subject: str, body: str)
     content = f"发件人: {sender}\n主题: {subject}\n正文:\n{body}"
     payload = {
         "model": ai_cfg.model,
+        "thinking": {"type": "disabled"},
         "messages": [
             {"role": "system", "content": PROMO_DETAIL_PROMPT},
             {"role": "user", "content": content},