Initial commit: HOA Financial Intelligence Platform MVP

Multi-tenant financial management platform for homeowner associations featuring:
- NestJS backend with 16 modules (auth, accounts, transactions, budgets, units,
  invoices, payments, vendors, reserves, investments, capital projects, reports)
- React + Mantine frontend with dashboard, CRUD pages, and financial reports
- Schema-per-tenant PostgreSQL isolation with JWT-based tenant resolution
- Docker Compose infrastructure (nginx, backend, frontend, postgres, redis)
- Comprehensive seed data for Sunrise Valley HOA demo
- 39 API endpoints with Swagger documentation
- Double-entry bookkeeping with journal entries
- Budget vs actual reporting and Sankey cash flow visualization

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

frontend/src/main.tsx

@@ -0,0 +1,37 @@
+import React from 'react';
+import ReactDOM from 'react-dom/client';
+import { MantineProvider } from '@mantine/core';
+import { Notifications } from '@mantine/notifications';
+import { ModalsProvider } from '@mantine/modals';
+import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
+import { BrowserRouter } from 'react-router-dom';
+import '@mantine/core/styles.css';
+import '@mantine/dates/styles.css';
+import '@mantine/notifications/styles.css';
+import { App } from './App';
+import { theme } from './theme/theme';
+
+const queryClient = new QueryClient({
+  defaultOptions: {
+    queries: {
+      retry: 1,
+      refetchOnWindowFocus: false,
+      staleTime: 30_000,
+    },
+  },
+});
+
+ReactDOM.createRoot(document.getElementById('root')!).render(
+  <React.StrictMode>
+    <MantineProvider theme={theme}>
+      <Notifications position="top-right" />
+      <ModalsProvider>
+        <QueryClientProvider client={queryClient}>
+          <BrowserRouter>
+            <App />
+          </BrowserRouter>
+        </QueryClientProvider>
+      </ModalsProvider>
+    </MantineProvider>
+  </React.StrictMode>,
+);