refactor(buttons): use square buttons instead of circle in layout/nav components

[dauriamarco]

Use square buttons instead of circle in layout/nav components.

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• I confirm that this MR follows the contribution guidelines.

[gemini-code-assist]

Summary of Changes

Hello @dauriamarco, 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 refactors the styling of several UI buttons across different components, transitioning them from a circular design to a square icon-based design. The primary goal is to enhance visual consistency throughout the application's user interface, particularly within navigation and layout elements, by standardizing the appearance of interactive buttons.

Highlights

• Button Styling Refactor: Replaced the btn-circle CSS class with btn-icon across various components to standardize button appearance to square icons.
• UI Consistency: Ensures a consistent visual style for interactive elements within the electron-titlebar, navbar-vertical, side-panel, and si-list-details components.

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[gemini-code-assist]

Code Review

The pull request successfully refactors the button styling from btn-circle to btn-icon across various components, aligning with the stated objective of using square buttons instead of circular ones in layout/nav components. The changes are consistent and correctly applied in all modified HTML files.

[github-actions]

Documentation.
Examples.
Playwright report.

Coverage Reports:

• element-ng
• element-translate-ng

[panch1739]

@dauriamarco Perfect, thanks!

[spike-rabbit]

👍

[github-actions]