feat: LAD A-Team CIS Compliance Report, React SPA, i18n, report management, explorer UX fixes

- Professional Oracle-format compliance report with RAG remediation from ADB vector store
- React 19 SPA at /app/ (16 pages, TypeScript, Vite, Zustand, i18n pt/en 625 keys)
- Report delete endpoint, embed individual report files into vector store
- Terraform ZIP download (client-side, pure JS)
- Explorer silent polling during start/stop (no flickering)
- HTML report and compliance report sections start minimized
- Token auth fix for compliance report CSV download links

frontend-react/src/main.tsx

@@ -0,0 +1,13 @@
+import { StrictMode } from 'react';
+import { createRoot } from 'react-dom/client';
+import { BrowserRouter } from 'react-router-dom';
+import './index.css';
+import App from './App.tsx';
+
+createRoot(document.getElementById('root')!).render(
+  <StrictMode>
+    <BrowserRouter basename="/app">
+      <App />
+    </BrowserRouter>
+  </StrictMode>,
+);