Add account registration flow

server/api/auth/register.post.ts

@@ -0,0 +1,34 @@
+import { hash } from 'bcryptjs'
+import { readBody, createError } from 'h3'
+import { prisma } from '../../utils/db'
+import { setSession } from '../../utils/auth'
+import { createDefaultMoneyData } from '../../utils/defaults'
+
+export default defineEventHandler(async (event) => {
+  const body = await readBody<{ email: string; password: string; name?: string }>(event)
+  const email = body.email?.trim().toLowerCase()
+  const password = body.password || ''
+  const name = body.name?.trim() || email?.split('@')[0] || '사용자'
+
+  if (!email || !email.includes('@') || password.length < 8) {
+    throw createError({ statusCode: 400, statusMessage: 'Invalid registration' })
+  }
+
+  const exists = await prisma.user.findUnique({ where: { email } })
+  if (exists) {
+    throw createError({ statusCode: 409, statusMessage: 'Email already exists' })
+  }
+
+  const user = await prisma.user.create({
+    data: {
+      email,
+      name,
+      passwordHash: await hash(password, 10)
+    }
+  })
+
+  await createDefaultMoneyData(prisma, user.id)
+  setSession(event, user.id)
+
+  return { id: user.id, email: user.email, name: user.name }
+})

server/utils/defaults.ts

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+import type { PrismaClient } from '@prisma/client'
+
+export async function createDefaultMoneyData(prisma: PrismaClient, userId: string) {
+  const cash = await prisma.asset.create({
+    data: {
+      userId,
+      name: '기본자산',
+      balanceType: 'cumulative',
+      initialBalance: 0,
+      sortOrder: 0
+    }
+  })
+
+  const incomeParent = await prisma.category.create({
+    data: { userId, type: 'income', name: '근로', sortOrder: 0 }
+  })
+  await prisma.category.create({
+    data: { userId, type: 'income', name: '월급', parentId: incomeParent.id, sortOrder: 0 }
+  })
+
+  const foodParent = await prisma.category.create({
+    data: { userId, type: 'expense', name: '식비', sortOrder: 0 }
+  })
+  await prisma.category.create({
+    data: { userId, type: 'expense', name: '외식', parentId: foodParent.id, sortOrder: 0 }
+  })
+
+  const livingParent = await prisma.category.create({
+    data: { userId, type: 'expense', name: '생활', sortOrder: 1 }
+  })
+  await prisma.category.create({
+    data: { userId, type: 'expense', name: '마트', parentId: livingParent.id, sortOrder: 0 }
+  })
+
+  return { cash }
+}