style: Update the signup and login buttons

[parvatijay2901]

This pull request includes several enhancements to the login and signup functionalities, focusing on improving form validation and user experience. The key changes involve adding new state properties, simplifying emit calls, and updating form validation logic.

Enhancements to Login Functionality:

• State Management:

  • Added isAllFieldsFilled property to LoginState to track if all fields are filled. (src/support_sphere/lib/logic/cubit/login_state.dart, [1] [2] [3]
  • Updated LoginCubit to include methods for validating all fields and checking if the login button should be enabled. (src/support_sphere/lib/logic/cubit/login_cubit.dart, src/support_sphere/lib/logic/cubit/login_cubit.dartL16-R38)

• Form Validation:

  • Modified LoginForm to use MultiBlocListener for handling multiple state changes and to validate all fields. (src/support_sphere/lib/presentation/components/auth/login_form.dart, [1] [2]
  • Updated input fields to set the form as invalid if validation fails. (src/support_sphere/lib/presentation/components/auth/login_form.dart, [1] [2]
  • Adjusted the login button to be enabled only when the form is valid and all fields are filled. (src/support_sphere/lib/presentation/components/auth/login_form.dart, [1] [2]

Enhancements to Signup Functionality:

• State Management:

  • Added isAllFieldsFilled property to SignupState to track if all fields are filled. (src/support_sphere/lib/logic/cubit/signup_state.dart, [1] [2] [3] [4] [5]
  • Updated SignupCubit to include methods for validating all fields and checking if the signup button should be enabled. (src/support_sphere/lib/logic/cubit/signup_cubit.dart, src/support_sphere/lib/logic/cubit/signup_cubit.dartL19-R64)

• Form Validation:

  • Modified SignupForm to use MultiBlocListener for handling multiple state changes and to validate all fields. (src/support_sphere/lib/presentation/components/auth/signup_form.dart, [1] [2]
  • Updated input fields to set the form as invalid if validation fails. (src/support_sphere/lib/presentation/components/auth/signup_form.dart, [1] [2] [3] [4] [5] [6] [7]

Related Issues

Resolves https://github.com/uw-ssec/post-disaster-comms/issues/90, #131

Duplicate of https://github.com/uw-ssec/post-disaster-comms/pull/130

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