Initial commit: full-stack Bun + Elysia + React template

Elysia.js API with session-based auth (email/password + Google OAuth),
role system (USER/ADMIN/SUPER_ADMIN), Prisma + PostgreSQL, React 19
with Mantine UI, TanStack Router, dark theme, and comprehensive test
suite (unit, integration, E2E with Lightpanda).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/frontend/App.tsx

@@ -0,0 +1,40 @@
+import { ColorSchemeScript, MantineProvider, createTheme } from '@mantine/core'
+import '@mantine/core/styles.css'
+import { QueryClient, QueryClientProvider } from '@tanstack/react-query'
+import { createRouter, RouterProvider } from '@tanstack/react-router'
+import { routeTree } from './routeTree.gen'
+
+const theme = createTheme({
+  primaryColor: 'blue',
+  fontFamily: 'Inter, system-ui, Avenir, Helvetica, Arial, sans-serif',
+})
+
+const queryClient = new QueryClient({
+  defaultOptions: {
+    queries: { staleTime: 30_000, retry: 1 },
+  },
+})
+
+const router = createRouter({
+  routeTree,
+  context: { queryClient },
+})
+
+declare module '@tanstack/react-router' {
+  interface Register {
+    router: typeof router
+  }
+}
+
+export function App() {
+  return (
+    <>
+      <ColorSchemeScript defaultColorScheme="dark" />
+      <MantineProvider theme={theme} defaultColorScheme="dark" forceColorScheme="dark">
+        <QueryClientProvider client={queryClient}>
+          <RouterProvider router={router} />
+        </QueryClientProvider>
+      </MantineProvider>
+    </>
+  )
+}