Admin chrome 500: UTF-16 corrupted nav files break changelog, docs, and /app

Found during UX audit (Jun 2026)

Visiting /hollahoop/changelog, /hollahoop/docs, and /app returned Next.js 500 errors locally because workspace-top-bar.tsx was saved as UTF-16LE ('use client' parsed as invalid characters). admin-top-bar.tsx and language-switcher.tsx also exported the wrong component (SidebarCollapseToggle duplicate).

Impact: Entire admin workspace shell and any route importing WorkspaceShell fails to compile.

Fix: Re-encode files as UTF-8 and restore proper AdminTopBar + LanguageSwitcher exports.