Registro + activación por email en Next.js (SRP6 + nodemailer)

- lib/mail.ts: transporte SMTP (nodemailer, mismas creds Gmail que Django).
- lib/register.ts: registerAccount (valida, comprueba email existente, crea fila en
  home_accountactivation reutilizando la tabla de Django, envía email de activación);
  activateAccount (crea battlenet_accounts con SRP6 v2 + account con SRP6 Grunt, como
  activate_account_view: expansion=2, battlenet_index=1; borra la activación).
- Route handlers /api/auth/register y /api/auth/activate.
- Páginas app/[locale]/register (RegisterForm cliente) y app/[locale]/activate-account
  (ActivateClient auto-POST al abrir el enlace). Textos en messages (Register, Activate).

Validado: validaciones (missingFields/passwordMismatch/invalidEmail/passwordTooLong);
ciclo completo activación->crea bnet+account->login OK con la cuenta creada
(needsSelection=false), password mala->invalidCredentials. Todo en TS, crypto validada.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

web-next/app/[locale]/register/RegisterForm.tsx

@@ -0,0 +1,74 @@
+'use client'
+
+import { useState } from 'react'
+import { useTranslations } from 'next-intl'
+
+const ERROR_KEYS = [
+  'missingFields',
+  'passwordMismatch',
+  'passwordTooLong',
+  'invalidEmail',
+  'emailExists',
+  'recruiterNotFound',
+] as const
+
+export function RegisterForm() {
+  const t = useTranslations('Register')
+  const [form, setForm] = useState({ password: '', confPassword: '', email: '', confEmail: '', recruiter: '' })
+  const [accepted, setAccepted] = useState(false)
+  const [busy, setBusy] = useState(false)
+  const [message, setMessage] = useState<{ ok: boolean; text: string } | null>(null)
+
+  function upd(k: string, v: string) {
+    setForm((f) => ({ ...f, [k]: v }))
+  }
+
+  async function handleSubmit(e: React.FormEvent) {
+    e.preventDefault()
+    if (busy || !accepted) return
+    setBusy(true)
+    setMessage(null)
+    try {
+      const res = await fetch('/api/auth/register', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        credentials: 'same-origin',
+        body: JSON.stringify(form),
+      })
+      const data: { success?: boolean; error?: string } = await res.json()
+      if (data.success) {
+        setMessage({ ok: true, text: t('success') })
+      } else {
+        const key = (ERROR_KEYS as readonly string[]).includes(data.error ?? '') ? data.error! : 'genericError'
+        setMessage({ ok: false, text: t(key) })
+      }
+    } catch {
+      setMessage({ ok: false, text: t('genericError') })
+    } finally {
+      setBusy(false)
+    }
+  }
+
+  const input = 'w-full rounded border border-amber-900/60 bg-[#2c1e14] px-3 py-2'
+
+  return (
+    <div className="mx-auto max-w-sm">
+      <p className="mb-4 text-sm text-amber-200/70">{t('info')}</p>
+      <form onSubmit={handleSubmit} className="space-y-3">
+        <input type="password" maxLength={16} placeholder={t('password')} value={form.password} onChange={(e) => upd('password', e.target.value)} className={input} />
+        <input type="password" maxLength={16} placeholder={t('confPassword')} value={form.confPassword} onChange={(e) => upd('confPassword', e.target.value)} className={input} />
+        <input type="email" placeholder={t('email')} value={form.email} onChange={(e) => upd('email', e.target.value)} className={input} />
+        <input type="email" placeholder={t('confEmail')} value={form.confEmail} onChange={(e) => upd('confEmail', e.target.value)} className={input} />
+        <input type="text" maxLength={12} placeholder={t('recruiter')} value={form.recruiter} onChange={(e) => upd('recruiter', e.target.value)} className={input} />
+        <label className="flex items-start gap-2 text-left text-sm">
+          <input type="checkbox" checked={accepted} onChange={(e) => setAccepted(e.target.checked)} className="mt-1" />
+          <span>{t('terms')}</span>
+        </label>
+        <button type="submit" disabled={busy || !accepted} className="w-full rounded bg-amber-600 px-4 py-2 font-semibold text-[#1b120b] disabled:opacity-60">
+          {busy ? t('creating') : t('submit')}
+        </button>
+      </form>
+      {message && <p className={`mt-3 text-center ${message.ok ? 'text-green-400' : 'text-red-400'}`}>{message.text}</p>}
+    </div>
+  )
+}