Update UI interactions and styles for toolbar and annotation tools

[Lortunate]

Summary

This pull request focuses on improving the user interface and interaction experience in the following areas:

• Updated SelectionToolbar spacing, cursor behavior, and icon sizes for consistency.
• Refined resize and selection interactions with smoother animations and styling improvements.
• Enhanced color picker functionality and improved behavior for overlay interactions.
• Optimized annotation interaction logic and improved layer management for better usability.

Additional Notes

No new features were introduced; focus was entirely on improving the user experience through styling updates and interaction refinements.

[gemini-code-assist]

Summary of Changes

Hello @Lortunate, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request delivers a comprehensive refinement of the user interface and interaction experience within the capture overlay. It focuses on enhancing the visual feedback and usability of core components such as the selection toolbar, resize handles, and the color picker. Additionally, the underlying logic for annotation creation and management has been improved to provide a more intuitive and polished interface, ensuring a smoother workflow for users without introducing new features.

Highlights

• Enhanced Color Picker: The color picker now supports HSL color format, features improved cursor control with arrow keys (including Shift for larger steps), and incorporates debounced color updates for a smoother user experience. Its visual styling, including magnifier size, zoom level, shadows, and grid lines, has also been significantly updated.
• Refined UI Styling and Animations: Resize handles and selection rectangles have received visual enhancements, including smoother scaling animations with Easing.OutCubic, adjusted border widths, and layered inner highlights for a more sophisticated appearance. Toolbar buttons and icons have also been standardized for better consistency.
• Improved Overlay Interactions and Layering: The z property has been strategically applied to the color picker, toolbar, and annotation properties to ensure correct visual layering. Annotation interactions are now prevented during drawing mode, and a bringToFront mechanism ensures newly created or selected annotations are always visible on top.
• Annotation Layer Management: A new drawingMode property has been introduced across annotation components to control draggable behavior specifically during the creation phase. The AnnotationLayer now includes functions to update this mode and to bring any selected or new annotation item to the foreground.

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[gemini-code-assist]

Code Review

This pull request introduces a range of UI and interaction improvements across the capture and annotation features. No security vulnerabilities were found. The changes enhance the color picker's functionality, selection and resizing animations, and layer management, leading to cleaner and more robust code. Minor areas for improvement related to code consistency and redundancy are detailed in specific comments.

[gemini-code-assist]

The button and icon sizes are hardcoded here. For better maintainability and consistency with the application's design system, these values should be defined as constants in AppTheme.qml. Please consider adding new theme properties for these sizes (e.g., toolbarButtonSizeSmall: 32, toolbarIconSize: 20) and referencing them here.

[gemini-code-assist]

This call to root.bringToFront(item) is redundant. The createAnnotationItem function, called on line 287, already handles bringing the new item to the front before returning it. This line can be safely removed.