removed jest fully and fixed final tests in libs

libs/http-client/test/http-client-integration.test.ts

@@ -95,7 +95,7 @@ describe('HttpClient Authentication Integration', () => {
     const token = 'test-token-123';
     const client = new HttpClient({
       defaultHeaders: {
-        'Authorization': `Bearer ${token}`
+        'authorization': `bearer ${token}`
       }
     });
     const response = await client.get(`${mockServerBaseUrl}/headers`);