WEB-1032: fix 2FA email OTP not working in login

The two-factor-authentication component uses ChangeDetectionStrategy.OnPush
but never calls markForCheck() after its asynchronous state updates, so the
view was never refreshed:

- Delivery methods loaded via getDeliveryMethods().subscribe() were never
  rendered, so the login screen showed "Please select a delivery method:"
  with no radio options and a permanently-disabled "Request OTP" button.
- otpRequested / tokenValidityTime set after requestOTP() never revealed
  the OTP entry field.
- loading / resendOTPLoading spinner states were also not reflected.

Inject ChangeDetectorRef and call markForCheck() after each async state
mutation (delivery-method load, requestOTP, validateOTP, resendOTP).

Verified end-to-end against the 2fa.mifos.community backend and a local
Fineract instance: the email delivery method now renders, the Request
OTP button enables on selection, and the OTP entry field appears.

Author: kanishksingh23

src/app/login/two-factor-authentication/two-factor-authentication.component.ts

@@ -7,7 +7,7 @@
  */
 
 /** Angular Imports */
-import { ChangeDetectionStrategy, Component, OnInit, inject } from '@angular/core';
+import { ChangeDetectionStrategy, ChangeDetectorRef, Component, OnInit, inject } from '@angular/core';
 import { FormGroup, FormBuilder, Validators, ReactiveFormsModule } from '@angular/forms';
 
 /** rxjs Imports */
@@ -44,6 +44,7 @@ import { STANDALONE_SHARED_IMPORTS } from 'app/standalone-shared.module';
 export class TwoFactorAuthenticationComponent implements OnInit {
   private formBuilder = inject(FormBuilder);
   private authenticationService = inject(AuthenticationService);
+  private changeDetectorRef = inject(ChangeDetectorRef);
 
   /** Available delivery methods to receive OTP. */
   twoFactorAuthenticationDeliveryMethods: any;
@@ -71,6 +72,8 @@ export class TwoFactorAuthenticationComponent implements OnInit {
     this.createTwoFactorAuthenticationDeliveryMethodForm();
     this.authenticationService.getDeliveryMethods().subscribe((deliveryMethods: any) => {
       this.twoFactorAuthenticationDeliveryMethods = deliveryMethods;
+      // OnPush: the delivery methods arrive asynchronously, so notify the view to render the options.
+      this.changeDetectorRef.markForCheck();
     });
   }
 
@@ -92,12 +95,15 @@ export class TwoFactorAuthenticationComponent implements OnInit {
           // Angular Material Bug: Validation errors won't get removed on reset.
           this.twoFactorAuthenticationDeliveryMethodForm.enable();
           this.loading = false;
+          this.changeDetectorRef.markForCheck();
         })
       )
       .subscribe((response: any) => {
         this.createTwoFactorAuthenticationForm();
         this.otpRequested = true;
         this.tokenValidityTime = response.tokenLiveTimeInSec;
+        // OnPush: reveal the OTP entry field once the OTP has been requested.
+        this.changeDetectorRef.markForCheck();
       });
   }
 
@@ -116,6 +122,7 @@ export class TwoFactorAuthenticationComponent implements OnInit {
           // Angular Material Bug: Validation errors won't get removed on reset.
           this.twoFactorAuthenticationForm.enable();
           this.loading = false;
+          this.changeDetectorRef.markForCheck();
         })
       )
       .subscribe();
@@ -136,6 +143,7 @@ export class TwoFactorAuthenticationComponent implements OnInit {
           // Angular Material Bug: Validation errors won't get removed on reset.
           this.twoFactorAuthenticationForm.enable();
           this.resendOTPLoading = false;
+          this.changeDetectorRef.markForCheck();
         })
       )
       .subscribe();