update model validate response: add error_code and error arrary

backend/app/component/error_format.py

@@ -0,0 +1,72 @@
+import json
+import re
+
+
+def normalize_error_to_openai_format(exception: Exception) -> tuple[str, str | None, dict | None]:
+    """
+    Normalize error to OpenAI-style error structure.
+
+    Args:
+        exception: The exception to normalize
+
+    Returns:
+        tuple: (message, error_code, error_object)
+    """
+    raw_msg = str(exception)
+    error_obj = None
+    error_code = None
+    message = raw_msg
+
+    # Match "Error code: <code> - {json}"
+    m = re.search(r"Error code:\s*(\d+)\s*-\s*(\{.*\})", raw_msg, re.DOTALL)
+    if m:
+        error_code = m.group(1)
+        try:
+            parsed = json.loads(m.group(2))
+            err = parsed.get("error") or parsed
+            if isinstance(err, dict):
+                error_obj = {
+                    "message": err.get("message"),
+                    "type": err.get("type"),
+                    "param": err.get("param"),
+                    "code": err.get("code"),
+                }
+                if err.get("message"):
+                    message = err.get("message")
+                if err.get("code"):
+                    error_code = err.get("code")
+        except Exception:
+            pass
+
+    # Heuristics if not parsed
+    if error_obj is None:
+        lower = raw_msg.lower()
+        if "invalid_api_key" in lower or "incorrect api key" in lower or "unauthorized" in lower or " 401" in lower:
+            error_code = "invalid_api_key"
+            message = "Incorrect API key provided."
+            error_obj = {
+                "message": message,
+                "type": "invalid_request_error",
+                "param": None,
+                "code": "invalid_api_key",
+            }
+        elif "model_not_found" in lower or "does not exist" in lower or " 404" in lower:
+            error_code = "model_not_found"
+            message = "The model does not exist or you do not have access to it."
+            error_obj = {
+                "message": message,
+                "type": "invalid_request_error",
+                "param": None,
+                "code": "model_not_found",
+            }
+        elif "insufficient_quota" in lower or "quota" in lower or " 429" in lower:
+            error_code = "insufficient_quota"
+            message = "You exceeded your current quota, please check your plan and billing details."
+            error_obj = {
+                "message": message,
+                "type": "insufficient_quota",
+                "param": None,
+                "code": "insufficient_quota",
+            }
+
+    return message, error_code, error_obj