优化交互式测试验证脚本，针对场景4修改提示词以及代码

tools/test_validate/modules/api_client.py

@@ -0,0 +1,60 @@
+import requests
+import time
+import json
+
+class APIClient:
+    def __init__(self, base_url="http://127.0.0.1:8000"):
+        self.base_url = base_url
+        self.endpoint = "/generate_plan"
+
+    def send_request(self, prompt, timeout=60):
+        """
+        Sends a request to the API and returns a structured result.
+        Returns:
+            dict: {
+                "success": bool,
+                "data": dict or None,
+                "latency": float (seconds),
+                "error": str or None,
+                "http_status": int or None
+            }
+        """
+        url = f"{self.base_url}{self.endpoint}"
+        payload = {"user_prompt": prompt}
+        headers = {"Content-Type": "application/json"}
+        
+        start_time = time.time()
+        try:
+            response = requests.post(url, json=payload, headers=headers, timeout=timeout)
+            latency = time.time() - start_time
+            
+            response.raise_for_status()
+            
+            try:
+                data = response.json()
+                return {
+                    "success": True,
+                    "data": data,
+                    "latency": latency,
+                    "error": None,
+                    "http_status": response.status_code
+                }
+            except json.JSONDecodeError:
+                return {
+                    "success": False,
+                    "data": None,
+                    "latency": latency,
+                    "error": f"Invalid JSON response: {response.text[:200]}",
+                    "http_status": response.status_code
+                }
+                
+        except requests.exceptions.RequestException as e:
+            latency = time.time() - start_time
+            return {
+                "success": False,
+                "data": None,
+                "latency": latency,
+                "error": str(e),
+                "http_status": getattr(e.response, 'status_code', None)
+            }
+