Implement a global exception handling service that:

1. Lets code throw global exceptions by type.
2. Looks up handlers in a registry.
3. Dispatches handlers in order (supports async) and isolates failures.
4. Supports idempotent handlers (skip within a short window).
5. Returns a DispatchResult for telemetry.

• AuthError, NetworkError, FeatureFlagError, UnknownError.

• logToSentry, showToast, navigateToLogin, clearAuth.

• Working implementation in src/exceptionService.ts and src/setupRegistry.ts.
• Tests in __tests__/ must pass (you may add more).

• Per-type rate limiting (e.g., max once per 3s).
• Per-handler timeout/cancellation.
• React error boundary that funnels errors into the service.

npm i
npm test
npm run build