feat(widgets): add UniFi OS widget

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

apps/nextjs/src/app/[locale]/manage/integrations/_components/secrets/integration-secret-icons.ts

@@ -28,6 +28,7 @@ export const integrationSecretIcons = {
   opnsenseApiSecret: IconPassword,
   patchmonApiKey: IconKey,
   patchmonApiSecret: IconPassword,
+  siteManagerApiKey: IconKey,
   githubAppId: IconCode,
   githubInstallationId: IconPlug,
   privateKey: IconKey,