* feat: Add support for Mux SSL mode and update related settings
- Introduced a new SSL mode "Mux" in the settings, allowing for HTTP to HTTPS redirection.
- Updated the `SSL` field in the `SettingUpdate` struct to include "Mux" as a valid option.
- Modified the server logic to handle Mux connections, including certificate management and HTTP redirection.
- Updated frontend components to reflect the new SSL options and improved user guidance in multiple languages.
* fix: Update HTTPS related messages for improved clarity and security guidance in multiple languages
* feat: Enhance browser cache management and localization support
- Updated browser cache handling in WebsiteService to include a 'noModify' option.
- Introduced new method AddBroswerNoCache in Location to manage no-cache directives.
- Added localization for 'noModify' in multiple languages.
- Updated frontend to support the new browser cache options in the proxy configuration.
* fix: Update cache display logic in proxy configuration
- Adjusted the rendering of cache tags in the proxy configuration to conditionally display based on cache time values.
- Improved user interface by adding margin classes for better spacing between cache tags.
* feat: Add file content preview functionality
- Implemented a new API endpoint for previewing file content.
- Added PreviewContent method in BaseApi to handle requests.
- Introduced GetPreviewContent method in FileService to retrieve file previews.
- Updated frontend to include a TextPreview component for displaying file previews.
- Added localization support for preview-related messages in multiple languages.
- Enhanced file management view to support previewing large files.
* feat: Update file preview functionality and interface
- Added PreviewContentReq interface to define request parameters for file preview.
- Updated getPreviewContent function to use the new PreviewContentReq type.
- Modified text-preview component to align with updated API, removing unnecessary parameters.
* fix: Update CPU usage retrieval to include detailed percentage information
* feat: Enhance CPU metrics by adding CPU frequency and detailed usage percentages
* feat: Add CPU frequency metric to dashboard base information