This is an admin console for managing AI video assistants. It is a Next.js 16 app using the App Router, React 19, Tailwind CSS v4, and shadcn components backed by Radix UI primitives.
**Navigation model** — each sidebar section is a real App Router route, so refresh/deep-link lands on the same page. Route files in `src/app/` are thin server components that render the page components from `src/components/pages/`. The route map:
`AssistantPage` is one client component driven by a discriminated-union `mode` prop; all in-page transitions (创建/编辑/返回) navigate via `router.push` instead of local view state. There is no separate create form: the 引导 page creates the assistant immediately (blank fields + chosen name/type) and the editor always works against an existing id. 保存 stays on the editor page — the save button is enabled only when the form differs from the last-saved snapshot (`savedSnapshot` JSON diff), and the header back button returns to the list.
-`src/data/mock.ts` — static mock data (no API layer yet)
**Path alias** — `@/` maps to `src/`.
## Design System
`DESIGN.md` is the authoritative spec. `src/app/globals.css` is the implementation — it sets the CSS custom properties consumed by all Tailwind utilities. Key rules:
- **Two themes from one navy palette.** Dark navy is the default (applied via `<html className="dark">` and a no-flash `localStorage` script in `layout.tsx`). Light is cool off-white. Toggle is a `ThemeToggle` component in `Topbar`.
- **Never hardcode hex values.** Drive color from semantic tokens: `bg-background`, `text-foreground`, `bg-card`, `text-ink`, `border-hairline`, `bg-surface-strong`, `text-muted-foreground`, etc.
- **Display typography** uses Cormorant Garamond (`--font-display`, `font-weight: 300`). Apply via the `.font-display` class or `.display-{mega|xl|lg|md|sm}` size helpers. **Never bold display copy.**
- **Body typography** uses Inter (`--font-sans`, `font-weight: 400/500`).
- **All CTAs and nav items are pill-shaped** (`rounded-full`). Cards use `rounded-2xl`; hero bands use `rounded-3xl`.
- **Gradient orbs** (mint, peach, lavender, sky, rose) are atmosphere-only — they appear as blurred `radial-gradient` backgrounds on hero panels and brand/avatar icons, never as button fills or text colors.
## Theming Implementation
`globals.css` defines `:root` (light) and `.dark` variable blocks. All shadcn variables (`--background`, `--card`, `--primary`, `--border`, …) plus editorial extras (`--ink`, `--canvas-soft`, `--surface-strong`, `--hairline*`, `--gradient-*`, `--body-text`) are declared there. The `@theme inline` block wires them into Tailwind utilities.
## shadcn / Radix
`components.json` configures shadcn with style `radix-luma`. Add new primitives via `npx shadcn add <component>` — they land in `src/components/ui/`. Icon library is Lucide React.
