refactor: migrate authentication from Supabase to Better Auth and update Prisma schema models

apps/backend/src/modules/onboarding/services/onboarding.service.ts

@@ -10,6 +10,7 @@ import type {
 } from '@repo/api-contract';
 import type { User as SupabaseAuthUser } from '@supabase/supabase-js';
 import { v7 as uuidv7 } from 'uuid';
+import { auth } from '@/lib/auth';
 
 const OTP_LENGTH = 6;
 const OTP_TTL_MINUTES = Number(Bun.env.ONBOARDING_OTP_TTL_MINUTES ?? 10);
@@ -404,11 +405,11 @@ export async function completeOnboarding(input: OnboardingCompleteInput) {
   });
 
   if (!onboardingRequest) {
-    throw new OnboardingError('Solicitud de onboarding invalida o expirada.', 400);
+    throw new OnboardingError('Solicitud de onboarding inválida o expirada.', 400);
   }
 
   if (onboardingRequest.otpExpiresAt < new Date()) {
-    throw new OnboardingError('La sesion de onboarding expiro. Solicita un nuevo OTP.', 400);
+    throw new OnboardingError('La sesión de onboarding expiró. Solicita un nuevo OTP.', 400);
   }
 
   if (!onboardingRequest.emailVerifiedAt) {
@@ -428,28 +429,18 @@ export async function completeOnboarding(input: OnboardingCompleteInput) {
     throw new OnboardingError('El plan seleccionado no existe.', 400);
   }
 
-  const supabaseUserId = await ensureSupabaseUser({
-    email: onboardingRequest.email,
-    fullName: onboardingRequest.fullName,
-    password: input.password,
+  const { user } = await auth.api.signUpEmail({
+    asResponse: false,
+    body: {
+      email: onboardingRequest.email,
+      password: input.password,
+      name: onboardingRequest.fullName,
+    },
   });
 
   const complexSlug = await buildUniqueComplexSlug(input.complexName);
 
   const result = await db.$transaction(async (tx) => {
-    const user = await tx.user.upsert({
-      where: { email: onboardingRequest.email },
-      update: {
-        fullName: onboardingRequest.fullName,
-        supabaseUserId,
-      },
-      create: {
-        id: uuidv7(),
-        fullName: onboardingRequest.fullName,
-        email: onboardingRequest.email,
-        supabaseUserId,
-      },
-    });
 
     const complex = await tx.complex.create({
       data: {
@@ -489,6 +480,5 @@ export async function completeOnboarding(input: OnboardingCompleteInput) {
 
   return {
     ...result,
-    supabaseUserId,
   };
 }