Restructure layout: top bar spans full width (Pulse logo left, user
actions right) with continuous bottom border. Sidebar sits below with
no vertical border collision. Remove logo from sidebar. Remove all
transition-colors from nav items to prevent white flash on click.
- Fix stretched logo with object-contain
- Remove border below logo
- Add overflow-hidden to prevent scrollbar flash during transition
- Match utility bar height to old header (py-3.5)
- Remove transition-colors from active nav items to prevent white flash
Sidebar takes full viewport height with Pulse logo at top. No Header
on site pages — UtilityBar in content area provides theme toggle, app
launcher, notifications, and user menu. Non-site authenticated pages
keep static Header. No footer on dashboard pages.
