[Bug] 本地导出为乱码，导入失败（Title: [Bug] The local export is garbled and the import fails.）

**Describe the bug**
A clear and concise description of what the bug is.
版本为：2.9.13 本地数据导出后为乱码，然后就无法导入了。（Version is: 2.9.13 After exporting the local data, it becomes garbled and cannot be imported.）
**To Reproduce**
Steps to reproduce the behavior:
1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error
导出导入（Export and import）

**Expected behavior**
A clear and concise description of what you expected to happen.

**Screenshots**
If applicable, add screenshots to help explain your problem.

**Deployment**
- [x] Docker
- [ ] Vercel
- [ ] Server

**Desktop (please complete the following information):**
- OS: [e.g. iOS]
- Browser [e.g. chrome, safari]
- Version [e.g. 22]
windows11+谷歌浏览器（Windows 11 + Google Chrome）
**Smartphone (please complete the following information):**
- Device: [e.g. iPhone6]
- OS: [e.g. iOS8.1]
- Browser [e.g. stock browser, safari]
- Version [e.g. 22]

**Additional Logs**
Add any logs about the problem here.

Start by reproducing local export and import on Windows 11 with Google Chrome using version 2.9.13, and inspect the exported file for the source of the garbling. Confirm the behavior for the Docker deployment and document the relevant error output. Done means exported local data remains readable and can be imported successfully.

Written by the indexing model from the issue text.