fix: avoid emitting empty appState for regular login flows

Author: yogeshchoudhary147

projects/auth0-angular/src/lib/auth.service.spec.ts

@@ -1143,7 +1143,7 @@ describe('AuthService', () => {
       });
     });
 
-    it('should add response_type to appState for regular login', (done) => {
+    it('should preserve appState as-is for regular login', (done) => {
       const appState = {
         myValue: 'State to Preserve',
       };
@@ -1158,10 +1158,7 @@ describe('AuthService', () => {
       const localService = createService();
       localService.handleRedirectCallback().subscribe(() => {
         localService.appState$.subscribe((receivedState) => {
-          expect(receivedState).toEqual({
-            ...appState,
-            response_type: ResponseType.Code,
-          });
+          expect(receivedState).toEqual(appState);
           done();
         });
       });

projects/auth0-angular/src/lib/auth.service.ts

@@ -391,18 +391,16 @@ export class AuthService<TAppState extends AppState = AppState>
         if (!isLoading) {
           this.authState.refresh();
         }
-        const { appState = {} as TAppState, response_type, ...rest } = result;
+        const { appState, response_type, ...rest } = result;
         const target = appState?.target ?? '/';
 
-        // Add response_type to appState
-        appState.response_type = response_type;
-
-        // If this is a connect account flow, add the connected account data to appState
         if (response_type === ResponseType.ConnectCode) {
-          appState.connectedAccount = rest as ConnectedAccount;
-        }
-
-        if (appState) {
+          this.appStateSubject$.next({
+            ...(appState ?? {}),
+            response_type,
+            connectedAccount: rest as ConnectedAccount,
+          } as TAppState);
+        } else if (appState) {
           this.appStateSubject$.next(appState);
         }