fix: tolerate blank creative job requests

api/main.py

@@ -5486,11 +5486,25 @@ def _write_creative_reference_frame(job_id: str, file_bytes: bytes | None = None
 
 
 @app.post("/creative/jobs/image", response_model=Job)
-async def create_creative_image_job(request: Request, file: UploadFile | None = File(default=None)) -> Job:
+async def create_creative_image_job(request: Request) -> Job:
     user = data_user_from_request(request)
     job_id = uuid.uuid4().hex[:12]
     file_bytes: bytes | None = None
     source_label = "blank"
+    file: UploadFile | None = None
+    content_type = request.headers.get("content-type", "").lower()
+    if "multipart/form-data" in content_type:
+        content_length = request.headers.get("content-length", "0")
+        if "boundary=" not in content_type and content_length in {"", "0"}:
+            file = None
+        else:
+            try:
+                form = await request.form()
+            except Exception as e:
+                raise HTTPException(400, f"invalid multipart body: {e}")
+            maybe_file = form.get("file")
+            if getattr(maybe_file, "filename", "") and hasattr(maybe_file, "read"):
+                file = maybe_file
     if file and file.filename:
         ext = Path(file.filename).suffix.lower()
         if ext not in {".jpg", ".jpeg", ".png", ".webp"}: