chore: frontend dead code removal and naming cleanup (#18690)

## Summary

- **Delete 10 unused files**: 7 hooks (`useWorkflowRunUnsafe`,
`useGetViewById`, `useCreateViewFieldGroup`, `useDeleteViewFieldGroup`,
`useUpdateViewFieldGroup`, `useCreateManyViewFieldGroups`,
`useMoveViewColumns` + test), 1 component (`SettingsSummaryCard`), 1
utility (`createEventContext`)
- **Rename `objectMetadataItemsState` → `objectMetadataItemsSelector`**
across ~85 files to accurately reflect it is a derived selector (via
`createAtomSelector`), not a base Jotai atom

## Details

### Dead code removed

| Type | Name | Reason |
|------|------|--------|
| Hook | `useWorkflowRunUnsafe` | Never imported — duplicate of
`useWorkflowRun` without schema validation |
| Hook | `useGetViewById` | Never imported — `useViewById` is used
instead |
| Hook | `useCreateViewFieldGroup` | Never imported — CRUD done via
`usePerformViewFieldGroupAPIPersist` |
| Hook | `useDeleteViewFieldGroup` | Same as above |
| Hook | `useUpdateViewFieldGroup` | Same as above |
| Hook | `useCreateManyViewFieldGroups` | Same as above |
| Hook | `useMoveViewColumns` | Only imported by its own test — no
production usage |
| Component | `SettingsSummaryCard` | Never imported anywhere |
| Utility | `createEventContext` | Never imported anywhere |

### Rename

`objectMetadataItemsState` is created via `createAtomSelector` (it
derives from `objectMetadataItemsWithFieldsSelector`), so naming it
`*State` is misleading. Renamed to `objectMetadataItemsSelector` for
consistency with sibling selectors like
`objectMetadataItemsByNamePluralMapSelector`.

packages/twenty-front/src/modules/workflow/hooks/useRunWorkflowRunOpeningInSidePanelEffects.ts

@@ -1,6 +1,6 @@
 import { useSidePanelWorkflowNavigation } from '@/side-panel/pages/workflow/hooks/useSidePanelWorkflowNavigation';
 import { useApolloCoreClient } from '@/object-metadata/hooks/useApolloCoreClient';
-import { objectMetadataItemsState } from '@/object-metadata/states/objectMetadataItemsState';
+import { objectMetadataItemsSelector } from '@/object-metadata/states/objectMetadataItemsSelector';
 import { type ObjectMetadataItem } from '@/object-metadata/types/ObjectMetadataItem';
 import { getRecordFromCache } from '@/object-record/cache/utils/getRecordFromCache';
 import { useObjectPermissions } from '@/object-record/hooks/useObjectPermissions';
@@ -35,7 +35,7 @@ export const useRunWorkflowRunOpeningInSidePanelEffects = () => {
       objectMetadataItem: ObjectMetadataItem;
       recordId: string;
     }) => {
-      const objectMetadataItems = store.get(objectMetadataItemsState.atom);
+      const objectMetadataItems = store.get(objectMetadataItemsSelector.atom);
 
       const workflowRunRecord = getRecordFromCache<WorkflowRun>({
         objectMetadataItem,

packages/twenty-front/src/modules/workflow/hooks/useWorkflowRunUnsafe.ts

@@ -1,16 +0,0 @@
-import { CoreObjectNameSingular } from 'twenty-shared/types';
-import { useFindOneRecord } from '@/object-record/hooks/useFindOneRecord';
-import { type WorkflowRun } from '@/workflow/types/Workflow';
-
-export const useWorkflowRunUnsafe = ({
-  workflowRunId,
-}: {
-  workflowRunId: string;
-}) => {
-  const { record } = useFindOneRecord<WorkflowRun>({
-    objectNameSingular: CoreObjectNameSingular.WorkflowRun,
-    objectRecordId: workflowRunId,
-  });
-
-  return record;
-};

packages/twenty-front/src/modules/workflow/workflow-variables/hooks/useStepsOutputSchema.ts

@@ -1,4 +1,4 @@
-import { objectMetadataItemsState } from '@/object-metadata/states/objectMetadataItemsState';
+import { objectMetadataItemsSelector } from '@/object-metadata/states/objectMetadataItemsSelector';
 import { type WorkflowVersion } from '@/workflow/types/Workflow';
 import { getStepOutputSchemaFamilyStateKey } from '@/workflow/utils/getStepOutputSchemaFamilyStateKey';
 import { getActionIcon } from '@/workflow/workflow-steps/workflow-actions/utils/getActionIcon';
@@ -24,7 +24,7 @@ export const useStepsOutputSchema = () => {
 
   const populateStepsOutputSchema = useCallback(
     (workflowVersion: WorkflowVersion) => {
-      const objectMetadataItems = store.get(objectMetadataItemsState.atom);
+      const objectMetadataItems = store.get(objectMetadataItemsSelector.atom);
 
       workflowVersion.steps?.forEach((step) => {
         const stepKey = getStepOutputSchemaFamilyStateKey(