Fix onboarding process not getting the subcription plan

frontend/src/api/types/auth.ts

@@ -28,6 +28,9 @@ export interface UserRegistration {
   phone?: string;
   language?: string;
   timezone?: string;
+  subscription_plan?: string;
+  use_trial?: boolean;
+  payment_method_id?: string;
 }
 
 export interface UserLogin {

frontend/src/components/domain/onboarding/OnboardingWizard.tsx

@@ -104,10 +104,14 @@ export const OnboardingWizard: React.FC = () => {
         console.log('🔄 Auto-completing user_registered step for new user...');
         setAutoCompletionAttempted(true);
 
+        // Merge with any existing data (e.g., subscription_plan from registration)
+        const existingData = userRegisteredStep?.data || {};
+
         markStepCompleted.mutate({
           userId: user.id,
           stepName: 'user_registered',
           data: {
+            ...existingData, // Preserve existing data like subscription_plan
             auto_completed: true,
             completed_at: new Date().toISOString(),
             source: 'onboarding_wizard_auto_completion'

frontend/src/stores/auth.store.ts

@@ -29,7 +29,15 @@ export interface AuthState {
   
   // Actions
   login: (email: string, password: string) => Promise<void>;
-  register: (userData: { email: string; password: string; full_name: string; tenant_name?: string }) => Promise<void>;
+  register: (userData: {
+    email: string;
+    password: string;
+    full_name: string;
+    tenant_name?: string;
+    subscription_plan?: string;
+    use_trial?: boolean;
+    payment_method_id?: string;
+  }) => Promise<void>;
   logout: () => void;
   refreshAuth: () => Promise<void>;
   updateUser: (updates: Partial<User>) => void;
@@ -93,7 +101,15 @@ export const useAuthStore = create<AuthState>()(
         }
       },
 
-      register: async (userData: { email: string; password: string; full_name: string; tenant_name?: string }) => {
+      register: async (userData: {
+        email: string;
+        password: string;
+        full_name: string;
+        tenant_name?: string;
+        subscription_plan?: string;
+        use_trial?: boolean;
+        payment_method_id?: string;
+      }) => {
         try {
           set({ isLoading: true, error: null });