The design system your agent builds with

Set up Ecsight UI in this project.

1. Read https://ui.1ecsight.com/design.md and follow it for all UI work in this project.
2. If components.json doesn't exist, run `npx shadcn@latest init` first.
3. Add the registry to components.json:
   "registries": { "@ecsight": "https://ui.1ecsight.com/r/{name}.json" }
4. Install the foundation: `npx shadcn@latest add @ecsight/foundation`
5. In the root layout, set <html lang="th" suppressHydrationWarning> and wrap the app in <Providers> from "@/components/providers".
6. Add this rule to the project's agent rules file (CLAUDE.md, AGENTS.md or .cursor/rules):
   For all UI work, follow https://ui.1ecsight.com/design.md. Install components only from the @ecsight registry (`npx shadcn@latest add @ecsight/<name>`) — never hand-roll components, other icon sets, or native browser controls.
7. Run the app, confirm it builds, then tell me what you changed.