fix: address PR review findings

- Remove ternary operators from new code (widget-integration-select,
  TabsContainer, mock data, members page)
- Remove stale /docs/management/tools/backup from sitemap type
- Add value prop to error-state Select in beszel-system-stats

packages/definitions/src/docs/homarr-docs-sitemap.ts

@@ -233,7 +233,6 @@ export type HomarrDocumentationPath =
   | "/docs/management/search-engines"
   | "/docs/management/settings"
   | "/docs/management/tasks"
-  | "/docs/management/tools/backup"
   | "/docs/management/users"
   | "/docs/widgets/anchor-note"
   | "/docs/widgets/app"