Normalize OpenAI image form fields

router/ai_profile_router.py

@@ -2229,6 +2229,7 @@ class Handler(BaseHTTPRequestHandler):
             try:
                 body = self._read_body()
                 files, data = self._parse_multipart_parts(body, content_type)
+                data = self._normalize_image_multipart_fields(data)
             except ValueError as exc:
                 self._send_error(400, str(exc),
                                  "invalid_request_error", "invalid_multipart")
@@ -2733,6 +2734,19 @@ class Handler(BaseHTTPRequestHandler):
 
         return files, fields
 
+    @staticmethod
+    def _normalize_image_multipart_fields(fields: dict[str, str]) -> dict:
+        """Konvertiert OpenAI-Formularzahlen in die JSON-API-Typen."""
+        normalized: dict = dict(fields)
+        for key in ("n", "steps"):
+            if key not in normalized:
+                continue
+            try:
+                normalized[key] = int(normalized[key])
+            except (TypeError, ValueError) as exc:
+                raise ValueError(f"'{key}' muss eine Ganzzahl sein") from exc
+        return normalized
+
     def _parse_multipart(self, data: bytes, content_type: str
                          ) -> tuple[bytes, str, dict]:
         """Kompatibler Einzeldatei-Wrapper für den STT-Pfad."""