Fix memoir image prompt parsing and host allowlist

api/tests/test_memoir_image_provider.py

@@ -176,6 +176,23 @@ class PollUntilCompleteTest(unittest.TestCase):
 
 
 class DownloadImageTest(unittest.TestCase):
+    def test_download_allows_liblib_tmp_image_host_by_default(self):
+        http_client = Mock()
+        resp = Mock()
+        resp.content = b"png-bytes"
+        resp.raise_for_status = Mock()
+        http_client.get.return_value = resp
+
+        provider = _make_provider(http_client)
+        payload = provider.download_image(
+            {"image_url": "https://liblibai-tmp-image.liblib.cloud/img/demo.png"}
+        )
+
+        self.assertEqual(payload, b"png-bytes")
+        http_client.get.assert_called_once_with(
+            "https://liblibai-tmp-image.liblib.cloud/img/demo.png"
+        )
+
     @patch.dict(os.environ, {"MEMOIR_IMAGE_DOWNLOAD_HOSTS": "cdn.example.com"}, clear=False)
     def test_download_fetches_binary_payload(self):
         http_client = Mock()