refactor: metadata store cleanup, SSE unification, mock metadata loading & login redirect fix (#18651)

## Summary
- **SSE unification**: Replaced 11 individual SSE effect components with
a single generic `MetadataStoreSSEEffect`
- **Metadata store cleanup**: Merged `metadataCollectionHashesState`
into `metadataStoreState` (currentCollectionHash / draftCollectionHash
per entity), moved `objectMetadataItemsSelector` to `object-metadata`
domain, converted `navigationMenuItemsState` to a derived selector
- **Naming clarity**: Renamed `isAppMetadataReadyState` →
`isMinimalMetadataReadyState`, `MetadataGater` → `MinimalMetadataGater`,
`useIsLogged` → `useHasAccessTokenPair`,
`patchMetadataStoreFromSSEEvent` now takes named object params
- **Mock metadata loading**: Added `generate-navigation-menu-items.ts`
script, rewrote `useLoadMockedMinimalMetadata` to load full
objects/fields/indexes/views/navItems from generated mock data, enabling
proper sign-in background rendering (table columns, view picker,
navigation)
- **Login/logout transitions**: `MinimalMetadataLoadEffect` manages
mocked↔real metadata transitions based on auth state,
`MainContextStoreProvider` computes context on auth pages for view
picker support
- **Login redirect fix**: `handleLoadWorkspaceAfterAuthentication` now
re-enables `isAppEffectRedirectEnabled` after `loadCurrentUser()`
completes, fixing the blocked post-login navigation
- **Dead code removal**: Deleted `useRefreshPageLayouts`,
`useApplyPageLayouts`, `useStaleMetadataEntities`,
`metadataCollectionHashesState`, and all individual SSE effects

## Test plan
- [x] Login from welcome page redirects to companies page
- [x] Logout transitions cleanly to mocked metadata on welcome page
- [x] Sign-in background shows table columns, view picker, and
navigation items
- [x] SSE events still update metadata store entries correctly
- [x] Navigation menu items persist across page refreshes
- [ ] CI: lint, typecheck, tests pass

packages/twenty-front/src/modules/views/hooks/useCreateViewFromCurrentView.ts

@@ -11,7 +11,6 @@ import { usePerformViewFieldAPIPersist } from '@/views/hooks/internal/usePerform
 import { usePerformViewFilterAPIPersist } from '@/views/hooks/internal/usePerformViewFilterAPIPersist';
 import { usePerformViewFilterGroupAPIPersist } from '@/views/hooks/internal/usePerformViewFilterGroupAPIPersist';
 import { usePerformViewSortAPIPersist } from '@/views/hooks/internal/usePerformViewSortAPIPersist';
-import { useRefreshCoreViewsByObjectMetadataId } from '@/views/hooks/useRefreshCoreViewsByObjectMetadataId';
 import { coreViewFromViewIdFamilySelector } from '@/views/states/selectors/coreViewFromViewIdFamilySelector';
 import { type GraphQLView } from '@/views/types/GraphQLView';
 import { ViewType } from '@/views/types/ViewType';
@@ -54,9 +53,6 @@ export const useCreateViewFromCurrentView = (viewBarComponentId?: string) => {
 
   const store = useStore();
 
-  const { refreshCoreViewsByObjectMetadataId } =
-    useRefreshCoreViewsByObjectMetadataId();
-
   const currentRecordFilterGroups = useAtomComponentStateValue(
     currentRecordFilterGroupsComponentState,
     recordIndexId,
@@ -246,8 +242,6 @@ export const useCreateViewFromCurrentView = (viewBarComponentId?: string) => {
         }
       }
 
-      await refreshCoreViewsByObjectMetadataId(objectMetadataItem.id);
-
       return newViewId;
     },
     [
@@ -256,7 +250,6 @@ export const useCreateViewFromCurrentView = (viewBarComponentId?: string) => {
       anyFieldFilterValue,
       objectMetadataItem,
       performViewFieldAPICreate,
-      refreshCoreViewsByObjectMetadataId,
       store,
       currentRecordFilterGroups,
       currentRecordFilters,