Refactor updateRow/addRow/removeRow to use functional setRows(prev => ...)
and ref-based onChange/duplicateNames access, making columns useMemo stable
across keystrokes so Semi UI Table does not re-mount Input components.
- Replaced ModelRatioSettings with ModelPricingCombined in the RatioSetting component.
- Updated tab structure to prioritize pricing settings over model settings.
- Removed unused imports for ModelRatioSettings and ModelSettingsVisualEditor.