Describe the bug
Interactive elements (buttons, sidebar blocks, and other clickable components) do not display a pointer cursor on hover. This reduces UI discoverability and makes it unclear which elements are clickable.

To Reproduce

1. Open ImageLab in the browser
2. Hover over interactive elements such as:

• The "Run" button
• Sidebar blocks/buttons
• Other buttons in the toolbar

3. The cursor remains as the default arrow instead of changing to a pointer hand icon

Expected behavior
All clickable elements should display a pointer (hand) cursor on hover, indicating they are interactive.

Screenshots
N/A

Environment:

• OS: macOS
• Browser: Chrome (specify which)
• Node.js version: 18.x

Additional context
This is a standard UX pattern that improves accessibility and user experience.