Add chat image upload support

tests/test_async_client.py

@@ -358,6 +358,64 @@ class TestAsyncChatClient:
         assert response.status_code == 200
         await client.close()
 
+    @pytest.mark.asyncio
+    async def test_presign_chat_file_post_url(self, api_key):
+        """Test async presigned chat file upload URL creation."""
+        client = AsyncChatClient(api_key)
+
+        mock_response = Mock(spec=httpx.Response)
+        mock_response.status_code = 200
+        mock_response.json = Mock(return_value={
+            "code": 200,
+            "message": "",
+            "data": {"url": "https://s3.example/upload", "fields": {"key": "chat/file.png"}},
+        })
+
+        with patch.object(client, "_send_request", AsyncMock(return_value=mock_response)) as mock_send:
+            result = await client.presign_chat_file_post_url(
+                appId="app-123",
+                chatId="chat-123",
+                filename="file.png",
+                fileSelectConfig={"canSelectImg": True},
+            )
+
+        assert result["fields"]["key"] == "chat/file.png"
+        assert mock_send.call_args[0][1] == "/api/core/chat/presignChatFilePostUrl"
+        await client.close()
+
+    @pytest.mark.asyncio
+    async def test_upload_chat_image_with_fields_gets_preview_url(self, api_key, tmp_path):
+        """Test async upload_chat_image normalizes presigned POST uploads."""
+        client = AsyncChatClient(api_key)
+        file_path = tmp_path / "file.png"
+        file_path.write_bytes(b"png")
+
+        with patch.object(client, "_get_chat_file_select_config", AsyncMock(return_value={"canSelectImg": True})), \
+            patch.object(client, "presign_chat_file_post_url", AsyncMock(return_value={
+                "url": "https://s3.example/upload",
+                "fields": {"key": "chat/file.png"},
+                "maxSize": 100,
+            })) as mock_presign, \
+            patch.object(client, "upload_to_presigned_url", AsyncMock()) as mock_upload, \
+            patch.object(client, "presign_chat_file_get_url", AsyncMock(return_value="https://s3.example/preview.png")) as mock_get:
+            result = await client.upload_chat_image(
+                appId="app-123",
+                chatId="chat-123",
+                file_path=file_path,
+            )
+
+        assert result == {
+            "type": "img",
+            "name": "file.png",
+            "key": "chat/file.png",
+            "url": "https://s3.example/preview.png",
+            "previewUrl": "https://s3.example/preview.png",
+        }
+        assert mock_presign.call_args[1]["fileSelectConfig"] == {"canSelectImg": True}
+        mock_upload.assert_awaited_once()
+        mock_get.assert_awaited_once_with(appId="app-123", key="chat/file.png", outLinkAuthData=None)
+        await client.close()
+
     @pytest.mark.asyncio
     async def test_get_chat_histories_basic(self, api_key, sample_chat_histories_response):
         """Test getting chat histories with basic parameters."""