fix: address PR review feedback

- Show error notification on setup failure instead of silent reset
- Fix toggleKind stale closure by using prop array directly
- Remove duplicate translations from en-gb.json (falls back to en.json)
- Align seed board columnCount to 12 (codebase default)
- Extract shared placeAllWidgetsAsync helper to @homarr/db/queries
- Remove redundant onboardingFormSchema; reuse formSchema for both paths
- Fix lint errors (optional chain, unused imports, unnecessary conditions)

apps/nextjs/src/components/integration/integration-grid-shared.ts

@@ -68,7 +68,9 @@ export interface IntegrationGridItem {
   widgets: WidgetKind[];
 }
 
-export const buildSortedIntegrations = (options: { enableMockIntegration?: boolean; onboarding?: boolean } = {}): IntegrationGridItem[] =>
+export const buildSortedIntegrations = (
+  options: { enableMockIntegration?: boolean; onboarding?: boolean } = {},
+): IntegrationGridItem[] =>
   integrationKinds
     .filter((kind) => {
       if (options.onboarding && hiddenFromOnboarding.has(kind)) return false;