Simplify Settings Tab and Expand Auto-Change Source Options

[munlicode]

Overview

The Settings tab needs simplification to enhance user experience and accessibility. Users should find it easy to navigate and configure their preferences without unnecessary complexity.

Requested Improvements

• Redesign the Settings tab to make it more straightforward and user-friendly.
• Auto-Change logic enhancements:
  • Allow users to choose sources not only from available APIs, but also from their favorites, history, bookmarks, and other personal collections.
  • Ensure clear labeling and intuitive selection of sources throughout the settings.

Acceptance Criteria

• The Settings tab is visibly simpler and easier to use.
• Auto-Change source picker lets the user choose from APIs, favorites, history, bookmarks, etc.
• All changes are covered with clear help texts or tooltips where necessary.
• No loss of existing functionality.

Additional context:
This improvement is expected to make the feature accessible for both new and experienced users, and to unify the way sources are managed throughout the application.