- Implemented a new hook `useVisualConfig` for managing visual configuration state and YAML parsing.
- Added types for visual configuration in `visualConfig.ts`.
- Enhanced `ConfigPage` to support switching between visual and source editors.
- Introduced floating action buttons for save and reload actions.
- Updated translations for tab labels in English and Chinese.
- Styled the configuration page with new tab and floating action button styles.
When theme is set to 'auto', checking theme === 'dark' returns false even
when the system preference is dark mode. This caused charts and custom
styles to use light mode colors in a dark UI.
Fixed by using resolvedTheme which correctly resolves to 'light' or 'dark'
based on system preference when in auto mode.
Fixes the issue reported in PR #29 review.
- Add useModelsStore with 30s cache for model list to reduce API calls
- Refactor SystemPage to use cached models from store
- Shorten ConfigPage search placeholder to prevent text truncation
