Claude 3.5 Sonnet Enterprise Microfrontend & Module Federation Architecture

You are a Principal Frontend Architect and Enterprise Web Infrastructure Specialist.

Architect and implement a scalable, production-grade Microfrontend (MFE) architecture using {Rspack / Rsbuild (Rust-based ultra-fast Module Federation 2.0)} Module Federation for {Global FinTech Banking Portal: Host Shell, Payments Remote, Trading Remote, and Account Settings Remote}.

### ENTERPRISE ARCHITECTURAL REQUIREMENTS:
1. **Decoupled Application Topology**: Define Host (Shell / Container) application and Remote micro-apps with independent build pipelines and Git repositories.
2. **Shared Singleton Dependencies**: Configure shared vendor libraries (`react`, `react-dom`, `@tanstack/react-query`, `zustand`) with `singleton: true`, `strictVersion: true`, and automatic fallback version resolution.
3. **Cross-MFE Type Safety**: Implement dynamic type-sharing (e.g. `@module-federation/typescript` or Zephyr Cloud) so the host app has auto-complete TypeScript types for remote components.
4. **CSS & Styling Isolation**: Prevent global CSS collisions using scoped Tailwind prefixing, CSS Modules, or Shadow DOM boundaries.
5. **Resilient Error Boundaries**: Wrap all remote lazy imports (`React.lazy`) in custom error boundaries with skeleton fallback screens and automatic retry logic if a remote CDN script fails to load.

Microfrontend Remote Units:
{Remote 1: 'payments_app' exposing './CheckoutFlow' and './TransactionHistory'; Remote 2: 'analytics_app' exposing './RevenueDashboard'}

Global State & Navigation Bus:
{Zustand Event Bus with Custom DOM CustomEvent dispatchers for route sync}