Integrates the shadcn/ui design system across the app and adds a collection of reusable UI primitives and layout components. Adds new UI atoms/molecules (avatar, card, collapsible, progress, select, sheet, sidebar, skeleton, table, tabs, toggles, tooltip), app sidebar, media filters, MediaTable, and a mobile hook; updates many views/components to use the new UI. Updates AGENTS.md with styling, layout, accessibility and design standards (Tailwind/shadcn guidance) and adds a registry entry to components.json. Also updates dependencies/lockfile to align shadcn and related packages.
Add a new Sidebar component and integrate it into App.tsx (replacing Header), updating overall layout to a two-column flex layout and moving/footer adjustments. Substantially refactor DetailView: new responsive layout, progress bar, tabbed navigation (Overview, Cast, Tracks, Seasons, etc.), improved cast and tracks UI, various icon and metadata display tweaks, and several UX/responsiveness fixes. Also add AGENTS.md (project development guide) and minor related imports/cleanup across changed files.
Lars Behrends