Refactor useAuth hooks for improved type safety, error handling, and compliance with auto-generated API client

- Migrated `useAuth` hooks to use functions from auto-generated API client for improved maintainability and OpenAPI compliance.
- Replaced manual API calls with SDK functions (`login`, `register`, `logout`, etc.) and added error type guards for runtime safety (`isTokenWithUser`, `isSuccessResponse`).
- Enhanced hooks with better error logging, optional success callbacks, and stricter type annotations.
- Refactored `Logout` and `LogoutAll` mutations to handle missing tokens gracefully and clear local state on server failure.
- Added tests for API type guards and updated functionality of hooks to validate proper behaviors.
- Removed legacy `client-config.ts` to align with new API client utilization.
- Improved inline documentation for hooks with detailed descriptions and usage guidance.

frontend/jest.setup.js

@@ -1,10 +1,22 @@
 // Learn more: https://github.com/testing-library/jest-dom
 import '@testing-library/jest-dom'
+import 'whatwg-fetch'; // Polyfill fetch API for MSW
 import { Crypto } from '@peculiar/webcrypto';
 
 // Mock window object
 global.window = global.window || {};
 
+// Mock BroadcastChannel for MSW
+global.BroadcastChannel = class BroadcastChannel {
+  constructor(name) {
+    this.name = name;
+  }
+  postMessage() {}
+  close() {}
+  addEventListener() {}
+  removeEventListener() {}
+};
+
 // Use real Web Crypto API polyfill for Node environment
 const cryptoPolyfill = new Crypto();