web-next: paridad de los campos de login con el tema Django

- Turnstile: quitar clases Tailwind del wrapper (my-3/flex/justify-center)
  → estilo inline neutral centrado, como la web Django.
- login/register/recover: el boton ya NO arranca deshabilitado (gris) por
  falta de captcha; se ve activo como en Django. El captcha lo sigue
  validando el servidor (devuelve captchaFailed). Se quita el SITE_KEY
  cliente ya innecesario.
- reset-password: pagina que habia quedado sin migrar (usaba nw-btn/
  nw-input/mx-auto/text-amber) → PageShell + middle-center-table + inputs
  planos + recover-button + alert-message, igual que el resto del flujo.

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

web-next/app/[locale]/reset-password/ResetForm.tsx

@@ -42,25 +42,42 @@ export function ResetForm({ token }: { token: string }) {
     }
   }
 
-  const field = 'nw-input'
-
   return (
-    <div className="mx-auto max-w-sm text-center">
-      <form onSubmit={handleSubmit} className="space-y-3">
-        <input type="password" maxLength={16} placeholder={t('password')} value={password} onChange={(e) => setPassword(e.target.value)} required className={field} />
-        <input type="password" maxLength={16} placeholder={t('confPassword')} value={confPassword} onChange={(e) => setConfPassword(e.target.value)} required className={field} />
-        <button type="submit" disabled={busy || done} className="w-full nw-btn disabled:opacity-60">
-          {busy ? t('saving') : t('submit')}
-        </button>
+    <>
+      <form onSubmit={handleSubmit} acceptCharset="utf-8">
+        <table className="middle-center-table">
+          <tbody>
+            <tr>
+              <td>
+                <input type="password" maxLength={16} placeholder={t('password')} value={password} onChange={(e) => setPassword(e.target.value)} required />
+              </td>
+            </tr>
+            <tr>
+              <td>
+                <input type="password" maxLength={16} placeholder={t('confPassword')} value={confPassword} onChange={(e) => setConfPassword(e.target.value)} required />
+              </td>
+            </tr>
+            <tr>
+              <td>
+                <button type="submit" className="recover-button" disabled={busy || done}>
+                  {busy ? t('saving') : t('submit')}
+                </button>
+              </td>
+            </tr>
+          </tbody>
+        </table>
       </form>
-      {message && <p className={`mt-3 ${message.ok ? 'text-green-400' : 'text-red-400'}`}>{message.text}</p>}
+      <hr />
+      <div className="alert-message" style={{ display: message ? 'block' : 'none' }}>
+        {message && (
+          <span className={message.ok ? 'ok-form-response' : 'red-form-response'}>{message.text}</span>
+        )}
+      </div>
       {done && (
-        <p className="mt-4">
-          <Link href="/login" className="text-sky-400 underline">
-            {t('goLogin')}
-          </Link>
+        <p>
+          <Link href="/login">{t('goLogin')}</Link>
         </p>
       )}
-    </div>
+    </>
   )
 }