767b8015fa
Add AppSidebar built from the shadcn sidebar primitives (collapsible icon rail, editable title, nav with active states, footer theme toggle and connection status) and wrap the app in a sidebar provider with an inset top bar. Preserves the always-mounted Playground pattern. - add src/components/AppSidebar.svelte - restructure App.svelte around Sidebar.Provider/Inset - remove Header.svelte Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01UmuGqwNBJNEAMaWsdCDqUC