feat: staff dashboard with magic link

[bigint]

What does this PR do?

🤖[deprecated] Generated by Copilot at 2f494c0

This pull request implements passwordless authentication for staff mode using magic-sdk and a new API endpoint. It also adds a staff dashboard page under the /staff route, with a link in the navbar and a sidebar for navigation. It also makes some minor adjustments to the spacing of the settings and sidebar components.

Related issues

Fixes # (issue)

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Enhancement (non-breaking small changes to existing functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Explanation of the changes

🤖[deprecated] Generated by Copilot at 2f494c0

• Add passwordless authentication using magic links for staff mode (link, link, link)
• Create staff dashboard page with sidebar and card components (link, link, link)
• Add staff dashboard link to StaffBar component with shield icon (link, link, link)
• Adjust spacing between elements in SettingsSidebar and Sidebar components (link, link)

Emoji

🔒📊🎨

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