curl --location --request POST 'https://api.302.ai/302/claude-code/sandbox/file/upload' \
--header 'Authorization: Bearer ' \
--form 'file=@""' \
--form 'sandbox_id="302-sandbox-xxxxxx"' \
--form 'path="/home/user/workspace/ai302-test"'{
"success": true,
"file": {
"name": "ai302-test",
"type": "file",
"path": "/home/user/workspace/ai302-test",
"size": 391608
}
}