Add settings endpoints and registration status check: implement new API endpoints for settings management, including registration status retrieval, and update the registration command handler to enforce registration rules based on site settings.

frontend/src/features/admin/settings/SettingsPanel.tsx

@@ -0,0 +1,62 @@
+import { useMutation, useQuery, useQueryClient } from '@tanstack/react-query'
+import { useEffect, useState } from 'react'
+import { useTranslation } from 'react-i18next'
+import { HttpError } from '@/shared/api/client'
+import { Button } from '@/shared/ui/button'
+import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/shared/ui/card'
+import { toast } from '@/shared/ui/toast-store'
+import { getSiteSettings, updateSiteSettings } from './api'
+
+export function SettingsPanel() {
+  const { t } = useTranslation()
+  const queryClient = useQueryClient()
+  const [registrationEnabled, setRegistrationEnabled] = useState(false)
+
+  const { data, isLoading } = useQuery({
+    queryKey: ['admin', 'settings'],
+    queryFn: getSiteSettings,
+  })
+
+  useEffect(() => {
+    if (data) setRegistrationEnabled(data.registrationEnabled)
+  }, [data])
+
+  const save = useMutation({
+    mutationFn: () => updateSiteSettings({ registrationEnabled }),
+    onSuccess: () => {
+      toast.success(t('settings.saved'))
+      void queryClient.invalidateQueries({ queryKey: ['admin', 'settings'] })
+    },
+    onError: (error: unknown) =>
+      toast.error(error instanceof HttpError ? error.detail : t('common.error')),
+  })
+
+  return (
+    <div className="flex flex-col gap-4">
+      <h2 className="crt-glow text-xl font-semibold">{t('admin.settings.title')}</h2>
+
+      <Card>
+        <CardHeader>
+          <CardTitle>{t('admin.settings.registration')}</CardTitle>
+          <CardDescription>{t('admin.settings.registrationHint')}</CardDescription>
+        </CardHeader>
+        <CardContent className="flex flex-col gap-4">
+          <label className="flex items-center gap-2 text-sm">
+            <input
+              type="checkbox"
+              checked={registrationEnabled}
+              disabled={isLoading}
+              onChange={(e) => setRegistrationEnabled(e.target.checked)}
+            />
+            {t('admin.settings.registrationLabel')}
+          </label>
+          <div>
+            <Button size="sm" disabled={isLoading || save.isPending} onClick={() => save.mutate()}>
+              {t('common.save')}
+            </Button>
+          </div>
+        </CardContent>
+      </Card>
+    </div>
+  )
+}

frontend/src/features/admin/settings/api.ts

@@ -0,0 +1,10 @@
+import { apiRequest } from '@/shared/api/client'
+import type { SiteSettings } from '@/shared/api/types'
+
+export function getSiteSettings() {
+  return apiRequest<SiteSettings>('/admin/settings')
+}
+
+export function updateSiteSettings(body: SiteSettings) {
+  return apiRequest<void>('/admin/settings', { method: 'PUT', body })
+}

frontend/src/features/auth/api.ts

@@ -1,7 +1,12 @@
 import { apiRequest, setAccessToken } from '@/shared/api/client'
-import type { AuthResponse, CurrentUser } from '@/shared/api/types'
+import type { AuthResponse, CurrentUser, RegistrationStatus } from '@/shared/api/types'
 import { useAuthStore } from './store'
 
+/** Публично: включена ли открытая регистрация (для страниц входа/регистрации). */
+export function fetchRegistrationStatus() {
+  return apiRequest<RegistrationStatus>('/auth/registration')
+}
+
 export function login(userName: string, password: string) {
   return apiRequest<AuthResponse>('/auth/login', { method: 'POST', body: { userName, password } })
 }