Add background image of manager #1298
Description
Is your request related to a specific issue? | 你的请求是否与某个问题相关？
No, this request is not tied to a specific bug or existing issue.
This is a UI/UX enhancement suggestion to improve customization inside the Manager interface.
Currently, the Manager UI does not support background customization, transparency options, or text color adjustments, making the interface less flexible for users who prefer personalized themes.
Describe the solution you'd like | 描述你想要的解决方案
I would like the Manager to support full UI customization through these new features:
- Background Image Selection
Add a button that lets the user choose an image from device storage.
Supported formats: JPG, PNG, WEBP.
Once selected, the chosen image becomes the Manager’s background.
The image path or bitmap should be saved so the background persists across launches.
- Transparent Information Panels
When a custom background is applied, all info containers (cards/panels) should support adjustable transparency.
Recommended default opacity: 70–80%.
Ideally implemented via a slider or fixed preset.
- Text Color Customization
Add a simple color picker for changing global text color.
Selected color should apply instantly across all UI labels and be saved for future sessions.
This improves readability depending on the background image.
Describe the alternatives you've considered | 描述您考虑过的备选方案
Using a static theme (light/dark) — does not offer enough customization and does not solve readability issues with custom backgrounds.
Manually modifying UI colors through code — not practical for end users and not persistent.
Using external modules/apps to force theme changes — unreliable and may break the UI.
These alternatives lack flexibility, user-friendliness, and do not provide a built-in, persistent solution.
Other information | 其他信息
No response