- Added a new modal for the Chart Builder to allow users to create visualizations from datasets.
- Integrated chart builder state management and validation for encoding configurations.
- Implemented auto-selection of default fields based on dataset column types.
- Added live preview functionality for real-time chart rendering.
- Created a new JavaScript file (chart-builder.js) to handle chart building logic.
- Updated app.js to initialize the chart builder and handle URL state changes.
- Enhanced styles in styles.css for the chart builder UI components.
- Documented the implementation details in project-docs/chart-builder-implementation.md.
- Introduced a new "Appearance" settings section in the settings modal to allow users to select between "Light" and "Dark (Experimental)" themes.
- Updated the application initialization to apply the saved UI theme immediately on page load.
- Enhanced the settings UI to load and save the selected theme.
- Implemented CSS variables for the new experimental dark theme, including color adjustments for various UI elements.
- Updated existing styles to support theme switching, ensuring proper color contrast and readability in both light and dark modes.
- Introduced a new modal for managing datasets, including options to create, view, and delete datasets.
- Implemented IndexedDB for persistent storage of datasets, allowing for efficient data retrieval and management.
- Added UI components for dataset details, including statistics and preview.
- Enhanced the app's JavaScript to handle dataset operations such as saving, updating, and deleting datasets.
- Integrated dataset reference resolution in the visualization editor to support dynamic data sources.
- Updated styles for the new modal and dataset management UI for improved user experience.
