feat: policy-controlled push relay URL with optional user lock

app/(main)/admin/_tabs/policy.tsx

@@ -74,6 +74,18 @@ export function PolicyTab() {
     setMessage(null);
   }
 
+  function setPushRelayUrl(value: string) {
+    setPolicy(prev => ({ ...prev, pushRelayUrl: value }));
+    setDirty(true);
+    setMessage(null);
+  }
+
+  function togglePushRelayLocked() {
+    setPolicy(prev => ({ ...prev, pushRelayUrlLocked: !prev.pushRelayUrlLocked }));
+    setDirty(true);
+    setMessage(null);
+  }
+
   function toggleLocked(settingKey: string) {
     setPolicy(prev => {
       const existing = prev.restrictions[settingKey] || {};
@@ -183,6 +195,34 @@ export function PolicyTab() {
         </div>
       </div>
 
+      <div className="border border-border rounded-lg">
+        <div className="px-4 py-3 border-b border-border bg-muted/30">
+          <h2 className="text-sm font-medium text-foreground">Push Relay</h2>
+          <p className="text-xs text-muted-foreground mt-0.5">Override the Web Push relay URL shown in user notification settings. Leave empty to use the built-in default.</p>
+        </div>
+        <div className="px-4 py-3 space-y-3">
+          <input
+            type="url"
+            inputMode="url"
+            autoComplete="off"
+            spellCheck={false}
+            value={policy.pushRelayUrl ?? ''}
+            onChange={(e) => setPushRelayUrl(e.target.value)}
+            placeholder="https://notifications.relay.example.com"
+            className="w-full rounded border border-input bg-background px-3 py-2 text-sm"
+          />
+          <label className="flex items-center gap-1.5 text-xs text-muted-foreground cursor-pointer">
+            <input
+              type="checkbox"
+              checked={!!policy.pushRelayUrlLocked}
+              onChange={togglePushRelayLocked}
+              className="rounded border-input"
+            />
+            <Lock className="w-3 h-3" /> Lock - users cannot change this URL
+          </label>
+        </div>
+      </div>
+
       {categories.map(category => (
         <div key={category} className="border border-border rounded-lg">
           <div className="px-4 py-3 border-b border-border bg-muted/30">

components/settings/notification-settings.tsx

@@ -7,7 +7,7 @@ import { SettingsSection, SettingItem, ToggleSwitch, Select } from './settings-s
 import { playNotificationSound, NOTIFICATION_SOUNDS } from '@/lib/notification-sound';
 import type { NotificationSoundChoice } from '@/lib/notification-sound';
 import { Button } from '@/components/ui/button';
-import { CheckCircle2, Volume2, XCircle } from 'lucide-react';
+import { CheckCircle2, Lock, Volume2, XCircle } from 'lucide-react';
 import { usePolicyStore } from '@/stores/policy-store';
 import { useAuthStore } from '@/stores/auth-store';
 import { ConfirmDialog } from '@/components/ui/confirm-dialog';
@@ -40,16 +40,30 @@ export function NotificationSettings() {
     updateSetting,
   } = useSettingsStore();
   const { isSettingLocked, isSettingHidden } = usePolicyStore();
+  const adminPushRelayUrl = usePolicyStore((s) => s.policy.pushRelayUrl);
+  const pushRelayLocked = usePolicyStore((s) => s.policy.pushRelayUrlLocked) === true;
   const client = useAuthStore((s) => s.client);
   const username = useAuthStore((s) => s.username);
   const { dialogProps: confirmDialogProps, confirm: confirmDialog } = useConfirmDialog();
 
   const supported = typeof window !== 'undefined' && isWebPushSupported();
-  const [relayUrl, setRelayUrl] = useState(DEFAULT_RELAY_BASE_URL);
+  const adminUrl = (adminPushRelayUrl ?? '').trim();
+  const [relayUrl, setRelayUrl] = useState(adminUrl || DEFAULT_RELAY_BASE_URL);
   const [pushStatus, setPushStatus] = useState<PushStatus>(
     supported ? { kind: 'idle' } : { kind: 'unsupported' },
   );
 
+  // Pull the admin-configured URL into local state when policy loads/changes.
+  // When locked, the admin value always wins; when only set (not locked), use
+  // it as the initial default but let the user override.
+  useEffect(() => {
+    if (pushRelayLocked && adminUrl) {
+      setRelayUrl(adminUrl);
+    } else if (adminUrl) {
+      setRelayUrl((current) => (current === DEFAULT_RELAY_BASE_URL ? adminUrl : current));
+    }
+  }, [adminUrl, pushRelayLocked]);
+
   useEffect(() => {
     if (!supported) return;
     if (!client) return;
@@ -125,12 +139,17 @@ export function NotificationSettings() {
       <SettingsSection title={t('push.title')} description={t('push.description')}>
         <div className="rounded-md border p-4 space-y-3">
           <div className="flex items-center justify-between gap-3">
-            <label className="text-sm font-medium" htmlFor="push-relay-url">
+            <label className="text-sm font-medium inline-flex items-center gap-1.5" htmlFor="push-relay-url">
               {t('push.relay_label')}
+              {pushRelayLocked && (
+                <Lock className="w-3 h-3 text-muted-foreground" aria-label={t('push.relay_locked')} />
+              )}
             </label>
             <PushStatusBadge status={pushStatus} t={t} />
           </div>
-          <p className="text-xs text-muted-foreground">{t('push.relay_desc')}</p>
+          <p className="text-xs text-muted-foreground">
+            {pushRelayLocked ? t('push.relay_locked_desc') : t('push.relay_desc')}
+          </p>
           <input
             id="push-relay-url"
             type="url"
@@ -140,7 +159,8 @@ export function NotificationSettings() {
             value={relayUrl}
             onChange={(e) => setRelayUrl(e.target.value)}
             placeholder={t('push.relay_placeholder')}
-            disabled={busy || pushStatus.kind === 'unsupported'}
+            disabled={busy || pushStatus.kind === 'unsupported' || pushRelayLocked}
+            readOnly={pushRelayLocked}
             className="w-full rounded border bg-background px-3 py-2 text-sm disabled:opacity-50"
           />
           <div className="flex flex-wrap gap-2">

lib/admin/types.ts

@@ -106,6 +106,10 @@ export interface SettingsPolicy {
   approvedPlugins: string[];
   /** Theme IDs that are force-enabled (users cannot deactivate) */
   forceEnabledThemes: string[];
+  /** Web Push relay base URL shown to users. Empty means the built-in default. */
+  pushRelayUrl?: string;
+  /** When true, users cannot change pushRelayUrl in notification settings. */
+  pushRelayUrlLocked?: boolean;
 }
 
 export const DEFAULT_POLICY: SettingsPolicy = {
@@ -116,6 +120,8 @@ export const DEFAULT_POLICY: SettingsPolicy = {
   forceEnabledPlugins: [],
   approvedPlugins: [],
   forceEnabledThemes: [],
+  pushRelayUrl: '',
+  pushRelayUrlLocked: false,
 };
 
 export interface AuditEntry {

locales/cs/common.json

@@ -955,6 +955,8 @@
         "reenable": "Znovu zaregistrovat",
         "relay_desc": "Výchozí je hostovaný relay Bulwark. Změňte pouze pokud používáte vlastní hosting.",
         "relay_label": "Push relay",
+        "relay_locked": "Nastaveno administrátorem",
+        "relay_locked_desc": "URL push relay byla nastavena administrátorem a nelze ji změnit.",
         "relay_placeholder": "https://notifications.relay.example.com",
         "status_active": "Aktivní na tomto zařízení",
         "status_busy": "Pracuji…",

locales/en/common.json

@@ -927,6 +927,8 @@
         "description": "Receive system notifications for new mail when this site is closed. Delivered via the Bulwark push relay; the relay never sees mail content.",
         "relay_label": "Push relay",
         "relay_desc": "Defaults to the hosted Bulwark relay. Change only if you self-host.",
+        "relay_locked": "Set by administrator",
+        "relay_locked_desc": "The push relay URL has been set by your administrator and cannot be changed.",
         "relay_placeholder": "https://notifications.relay.example.com",
         "status_active": "Active on this device",
         "status_inactive": "Not enabled on this device",

locales/nl/common.json

@@ -955,6 +955,8 @@
         "reenable": "Opnieuw registreren",
         "relay_desc": "Gebruikt standaard de gehoste Bulwark-relay. Wijzig alleen als je zelf hostt.",
         "relay_label": "Push-relay",
+        "relay_locked": "Ingesteld door beheerder",
+        "relay_locked_desc": "De push-relay-URL is ingesteld door je beheerder en kan niet worden gewijzigd.",
         "relay_placeholder": "https://notifications.relay.example.com",
         "status_active": "Actief op dit apparaat",
         "status_busy": "Bezig…",