feat(ui): scaffold the blueprint SPA — vite 7 + tailwind 4 + kit theme

New workspace member built on @unom/ui 0.9.1 + @unom/app-ui 0.2.0 +
@punktfunk/plugin-kit/react, effect 4.0.0-beta.99 exact. base:'./' with
build straight into ../plugin/dist/ui; :5599 dev server proxies /api to
the plugin dev API only in live mode. styles.css = tailwind + tw-animate
+ the kit's violet theme (NOT @unom/ui's own neutral palette) + bare-dir
@source globs over the design-system dist.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

ui/src/routes.ts

@@ -0,0 +1,15 @@
+// The flat route list, shared by App.tsx and the pages (kept out of App.tsx so pages
+// can type their `navigate` prop without importing the shell).
+export const ROUTES = [
+	"overview",
+	"library",
+	"sources",
+	"emulators",
+	"settings",
+] as const;
+
+export type Route = (typeof ROUTES)[number];
+
+export type PageProps = {
+	readonly navigate: (route: Route) => void;
+};