[Refactor] Extract color selector as component

[huchenlei]

Color Customization Component Refactor

This PR extracts the color selection functionality into a reusable ColorCustomizationSelector component, improving code maintainability and reusability across the application.

Changes

• Created new ColorCustomizationSelector.vue component that handles both predefined and custom color selection
• Updated CustomizationDialog.vue to use the new component
• Simplified color state management by using a single finalColor ref instead of separate states for predefined/custom colors
• Improved type safety with TypeScript props definitions
• Maintained existing functionality while reducing code duplication

Testing

• Verify that both predefined and custom color selection work as before
• Confirm that color reset and initialization work correctly
• Check that color updates are properly emitted to parent components

The refactor makes the color selection logic more maintainable and easier to reuse in other parts of the application where color customization is needed.

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