Fix manage sidebar not displaying beside content

[andreagrandi]

Summary

• The DaisyUI drawer sidebar was rendering below the page content instead of beside it on desktop
• Root cause: the drawer component uses CSS grid internally and needs an explicit height to lay out horizontally — the flex-1 on the <main> tag wasn't providing enough height context
• Added min-h-[calc(100vh-4rem)] to the drawer container to account for the navbar height

Test plan

• Visit /manage/ — sidebar should appear on the left with content on the right
• Visit /manage/libraries/ — same layout
• Check mobile — sidebar should be hidden behind hamburger menu
• Verify public pages are unaffected

[andreagrandi]

Not needed — the sidebar issue was caused by stale CSS cache in the browser, not a code problem. The drawer works correctly after a CSS rebuild.