view data fixes

apps/website/lib/view-models/auth/SignupViewModel.ts

@@ -1,44 +1,22 @@
+import { ViewModel } from "../../contracts/view-models/ViewModel";
+import type { SignupFormState, SignupUIState } from "./SignupInterfaces";
+
 /**
  * Signup ViewModel
  * 
  * Client-side state management for signup flow.
  * Immutable, class-based, contains only UI state.
  */
-
-export interface SignupFormField {
-  value: string;
-  error?: string;
-  touched: boolean;
-  validating: boolean;
-}
-
-export interface SignupFormState {
-  fields: {
-    firstName: SignupFormField;
-    lastName: SignupFormField;
-    email: SignupFormField;
-    password: SignupFormField;
-    confirmPassword: SignupFormField;
-  };
-  isValid: boolean;
-  isSubmitting: boolean;
-  submitError?: string;
-  submitCount: number;
-}
-
-export interface SignupUIState {
-  showPassword: boolean;
-  showConfirmPassword: boolean;
-}
-
-export class SignupViewModel {
+export class SignupViewModel extends ViewModel {
   constructor(
     public readonly returnTo: string,
     public readonly formState: SignupFormState,
     public readonly uiState: SignupUIState,
     public readonly mutationPending: boolean = false,
     public readonly mutationError: string | null = null
-  ) {}
+  ) {
+    super();
+  }
 
   withFormState(formState: SignupFormState): SignupViewModel {
     return new SignupViewModel(
@@ -77,4 +55,4 @@ export class SignupViewModel {
   get submitError(): string | undefined {
     return this.formState.submitError || this.mutationError || undefined;
   }
-}
+}