feat: add POST /api/auth/register endpoint

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

server/api/auth/register.post.ts

@@ -0,0 +1,43 @@
+import { registerSchema } from '../../utils/auth/validation'
+import { verifyCaptcha } from '../../utils/auth/captcha'
+import { dbGlobal } from 'drizzle-pkg/lib/db'
+import { users } from 'drizzle-pkg/lib/schema/auth'
+import { eq } from 'drizzle-orm'
+import { hash } from 'bcryptjs'
+
+export default defineWrappedResponseHandler(async (event) => {
+  const body = await readBody(event)
+
+  const parsed = registerSchema.safeParse(body)
+  if (!parsed.success) {
+    return R.error(parsed.error.issues[0]?.message || '表单验证失败', null)
+  }
+
+  const { username, password, captchaToken, captchaText } = parsed.data
+
+  if (!verifyCaptcha(captchaToken, captchaText)) {
+    return R.error('验证码错误或已过期', null)
+  }
+
+  const existing = await dbGlobal
+    .select()
+    .from(users)
+    .where(eq(users.username, username))
+  if (existing.length > 0) {
+    return R.error('用户名已存在', null)
+  }
+
+  const hashedPassword = await hash(password, 10)
+
+  const result = await dbGlobal
+    .insert(users)
+    .values({
+      username,
+      password: hashedPassword,
+      role: 'user',
+      status: 'active',
+    })
+    .returning({ id: users.id })
+
+  return R.success({ id: result[0].id, username })
+})