fix(desktop): offer a Restart gateway action on messaging save/toggle toasts

The "setup saved" and "platform enabled/disabled" toasts told users their
change needs a gateway restart but left it a separate hunt. Attach a "Restart
gateway" action (the shared runGatewayRestart), and reword the copy to state
the pending consequence ("...takes effect after a gateway restart") now that
the button carries the verb. Updated all 4 locales.

apps/desktop/src/app/messaging/index.tsx

@@ -17,6 +17,7 @@ import { type Translations, useI18n } from '@/i18n'
 import { AlertTriangle, ExternalLink, Save, Trash2 } from '@/lib/icons'
 import { cn } from '@/lib/utils'
 import { notify, notifyError } from '@/store/notifications'
+import { runGatewayRestart } from '@/store/system-actions'
 
 import { useRefreshHotkey } from '../hooks/use-refresh-hotkey'
 import { useRouteEnumParam } from '../hooks/use-route-enum-param'
@@ -97,6 +98,8 @@ function fieldCopy(field: MessagingEnvVarInfo, m: Translations['messaging']) {
 export function MessagingView({ setStatusbarItemGroup: _setStatusbarItemGroup, ...props }: MessagingViewProps) {
   const { t } = useI18n()
   const m = t.messaging
+  // Both save/toggle toasts offer the same one-click restart.
+  const restartGatewayAction = { label: t.commandCenter.restartGateway, onClick: () => void runGatewayRestart() }
   const [platforms, setPlatforms] = useState<MessagingPlatformInfo[] | null>(null)
   const [edits, setEdits] = useState<EditMap>({})
   const [query, setQuery] = useState('')
@@ -197,7 +200,8 @@ export function MessagingView({ setStatusbarItemGroup: _setStatusbarItemGroup, .
       notify({
         kind: 'success',
         title: enabled ? m.platformEnabled(platform.name) : m.platformDisabled(platform.name),
-        message: m.restartToApply
+        message: m.restartToApply,
+        action: restartGatewayAction
       })
     } catch (err) {
       notifyError(err, m.failedUpdate(platform.name))
@@ -222,7 +226,8 @@ export function MessagingView({ setStatusbarItemGroup: _setStatusbarItemGroup, .
       notify({
         kind: 'success',
         title: m.setupSaved(platform.name),
-        message: m.restartToReconnect
+        message: m.restartToReconnect,
+        action: restartGatewayAction
       })
     } catch (err) {
       notifyError(err, m.failedSave(platform.name))

apps/desktop/src/i18n/en.ts

@@ -831,9 +831,9 @@ export const en: Translations = {
     disableAria: name => `Disable ${name}`,
     platformEnabled: name => `${name} enabled`,
     platformDisabled: name => `${name} disabled`,
-    restartToApply: 'Restart the gateway for this change to take effect.',
+    restartToApply: 'This change takes effect after a gateway restart.',
     setupSaved: name => `${name} setup saved`,
-    restartToReconnect: 'Restart the gateway to reconnect with the new credentials.',
+    restartToReconnect: 'New credentials take effect after a gateway restart.',
     keyCleared: key => `${key} cleared`,
     setupUpdated: name => `${name} setup was updated.`,
     failedUpdate: name => `Failed to update ${name}`,

apps/desktop/src/i18n/ja.ts

@@ -952,9 +952,9 @@ export const ja = defineLocale({
     disableAria: name => `${name} を無効にする`,
     platformEnabled: name => `${name} を有効にしました`,
     platformDisabled: name => `${name} を無効にしました`,
-    restartToApply: 'この変更を有効にするにはゲートウェイを再起動してください。',
+    restartToApply: 'この変更はゲートウェイの再起動後に有効になります。',
     setupSaved: name => `${name} の設定を保存しました`,
-    restartToReconnect: '新しい認証情報で再接続するにはゲートウェイを再起動してください。',
+    restartToReconnect: '新しい認証情報はゲートウェイの再起動後に有効になります。',
     keyCleared: key => `${key} をクリアしました`,
     setupUpdated: name => `${name} の設定が更新されました。`,
     failedUpdate: name => `${name} の更新に失敗しました`,

apps/desktop/src/i18n/zh-hant.ts

@@ -924,9 +924,9 @@ export const zhHant = defineLocale({
     disableAria: name => `停用 ${name}`,
     platformEnabled: name => `${name} 已啟用`,
     platformDisabled: name => `${name} 已停用`,
-    restartToApply: '重新啟動閘道後此變更才會生效。',
+    restartToApply: '此變更將在閘道重新啟動後生效。',
     setupSaved: name => `${name} 設定已儲存`,
-    restartToReconnect: '重新啟動閘道以使用新憑證重新連線。',
+    restartToReconnect: '新憑證將在閘道重新啟動後生效。',
     keyCleared: key => `${key} 已清除`,
     setupUpdated: name => `${name} 設定已更新。`,
     failedUpdate: name => `更新 ${name} 失敗`,

apps/desktop/src/i18n/zh.ts

@@ -1021,9 +1021,9 @@ export const zh: Translations = {
     disableAria: name => `禁用 ${name}`,
     platformEnabled: name => `${name} 已启用`,
     platformDisabled: name => `${name} 已禁用`,
-    restartToApply: '重启网关后此更改才会生效。',
+    restartToApply: '此更改将在网关重启后生效。',
     setupSaved: name => `${name} 设置已保存`,
-    restartToReconnect: '重启网关以使用新凭据重新连接。',
+    restartToReconnect: '新凭据将在网关重启后生效。',
     keyCleared: key => `${key} 已清除`,
     setupUpdated: name => `${name} 设置已更新。`,
     failedUpdate: name => `更新 ${name} 失败`,