Style Engine 1.3.0

A major reliability, usability, and architecture update.

What’s new:

• Rebuilt Chrome/Edge and Firefox versions from a shared source codebase.
• Moved normal settings and rules fully to local browser storage.
• Added automatic saving with an option to return to manual Save controls.
• Improved live CSS updates and JavaScript preview behavior.
• Added cleanup for common JavaScript preview effects when code is disabled or replaced.
• Improved SPA navigation handling.
• Added independent CSS and JavaScript controls for global and per-site rules.
• Redesigned Site Rules management with a persistent website list and dedicated editor.
• Improved popup and Settings synchronization.
• Improved backup and restore reliability.
• Added light, dark, and system appearance modes.
• Refined the dark theme to a neutral black and grayscale design.
• Added multilingual interface support for 10 languages.
• Improved permission handling so unsaved work is preserved when website access is requested.
• Improved editor rendering, state handling, and popup behavior.
• Added extensive regression tests and cross-browser build validation.
• Numerous UI, accessibility, localization, and reliability improvements.