fix: 系统时间注入 system prompt，修复日期幻觉

image_daemon.py

@@ -387,8 +387,11 @@ def chat_with_llm(user_text, history=None):
 
         import json as _json
         soul = _soul_prompt or "You are a helpful assistant."
+        now_str = time.strftime("%Y-%m-%d %H:%M:%S %Z")
+        dated_soul = f"[当前系统时间: {now_str}]\n\n{soul}"
         headers = {"Authorization": f"Bearer {API_KEY}", "Content-Type": "application/json"}
-        messages = [{"role": "system", "content": soul}] + (history or []) + [{"role": "user", "content": user_text}]
+        messages = [{"role": "system", "content": dated_soul}] + (history or []) + [{"role": "user", "content": user_text}]
+
 
         for _ in range(4):  # 最多 3 次工具调用 + 1 次最终回复
             log(f"🤖 外部 LLM ({MODEL_NAME}): {user_text[:50]}...")