Compression fixes (#3081)

# Description of Changes

Please provide a summary of the changes, including:

- What was changed
- Why the change was made
- Any challenges encountered

Closes #(issue_number)

---

## Checklist

### General

- [ ] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [ ] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md)
(if applicable)
- [ ] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/HowToAddNewLanguage.md)
(if applicable)
- [ ] I have performed a self-review of my own code
- [ ] My changes generate no new warnings

### Documentation

- [ ] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

### UI Changes (if applicable)

- [ ] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)

### Testing (if applicable)

- [ ] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md#6-testing)
for more details.

src/main/resources/messages_zh_CN.properties

@@ -931,10 +931,9 @@ compress.title=压缩
 compress.header=压缩 PDF
 compress.credit=此服务使用qpdf进行 PDF 压缩/优化。
 compress.grayscale.label=应用灰度进行压缩
-compress.selectText.1=手动模式 - 从 1 到 5
-compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=优化级别：
-compress.selectText.3=4（文本图像很糟糕）
 compress.selectText.4=自动模式 - 自动调整质量以获得精确大小的PDF
 compress.selectText.5=预期PDF大小（例如：25MB、10.8MB、25KB）
 compress.submit=压缩