feat: Update Sign up and Login Buttons

[lsetiawan]

This pull request introduces several enhancements to the login and signup functionality. The changes focus on improving form validation, adding new state properties, and optimizing the UI components for better user experience.

Enhancements to Form Validation and State Management:

• src/support_sphere/lib/logic/cubit/login_cubit.dart: Simplified the emailChanged and passwordChanged methods, added validateAllFieldsFilled, and introduced isLoginButtonEnabled to ensure all fields are filled before enabling the login button.
• src/support_sphere/lib/logic/cubit/login_state.dart: Added a new state property isAllFieldsFilled to track if all form fields are filled. Updated the copyWith method and props list accordingly. [1] [2] [3]

Enhancements to Signup Functionality:

• src/support_sphere/lib/logic/cubit/signup_cubit.dart: Simplified field change methods, added validateAllFieldsFilled, and introduced isSignupButtonEnabled to ensure all fields are filled before enabling the signup button.
• src/support_sphere/lib/logic/cubit/signup_state.dart: Added a new state property isAllFieldsFilled to track if all form fields are filled. Updated the copyWith method and props list accordingly. [1] [2] [3] [4] [5]

UI Component Improvements:

• src/support_sphere/lib/presentation/components/auth/login_form.dart: Changed BlocListener to MultiBlocListener for better state management, added form validation listeners, and updated button states based on form validation. [1] [2] [3] [4] [5] [6]
• src/support_sphere/lib/presentation/components/auth/signup_form.dart: Changed BlocListener to MultiBlocListener for better state management, added form validation listeners, and updated button states based on form validation. [1] [2] [3] [4] [5] [6] [7] [8]

Related Issues

Resolves #90

Duplicate of #130

[github-actions[bot]]

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