88be33879c
- AISidebar: full height, right of TopBar and Toolbar (all pages except AI Assistant) - AISidebar: collapsed mode shows narrow 48px icon strip with KI button - AISidebar: expanded mode uses ResizablePanel with drag-to-resize (240-600px) - AppShell: moved AISidebar outside inner content container to full-height flex - uiStore: renamed aiSidebarOpen→aiSidebarCollapsed (default: true=collapsed) - TopBar: AI button highlights when sidebar is expanded