In the logs, neither the user‑uploaded images nor the generated images can be previewed; all are broken.

### Self Checks

- [x] I have read the [Contributing Guide](https://github.com/langgenius/dify/blob/main/CONTRIBUTING.md) and [Language Policy](https://github.com/langgenius/dify/issues/1542).
- [x] This is only for bug report, if you would like to ask a question, please head to [Discussions](https://github.com/langgenius/dify/discussions/categories/general).
- [x] I have searched for existing issues [search for existing issues](https://github.com/langgenius/dify/issues), including closed ones.
- [x] I confirm that I am using English to submit this report, otherwise it will be closed.
- [x] 【中文用户 & Non English User】请使用英语提交，否则会被关闭 ：）
- [x] Please do not modify this template :) and fill in all the required fields.

### Dify version

1.16.0

### Cloud or Self Hosted

Self Hosted (Docker)

### Steps to reproduce

### ✔️ Expected Behavior

### ❌ Actual Behavior

The report names no source file, test, or entry point. Start by reproducing the broken previews in a self-hosted Docker deployment and trace the logs view for both user-uploaded and generated images; done means both image types preview correctly in logs.

Written by the indexing model from the issue text.