fix: duplicate merge button bug (#15284)

Fixes - https://github.com/twentyhq/twenty/issues/15263

- Replaced `useLoadSelectedRecordsInContextStore` with
`useLoadMergeRecords` in `useOpenMergeRecordsPageInCommandMenu` for
improved functionality.
- Updated `useMergePreview`, `useMergeRecordsActions`, and
`useMergeRecordsSettings` to utilize `mergeRecordsState` instead of the
deprecated context store hook.
- Cleaned up imports and ensured consistency across merge-related hooks.


https://github.com/user-attachments/assets/453539c9-7f2b-4e8c-bfa1-3ceebca07081

---------

Co-authored-by: Charles Bochet <charles@twenty.com>

packages/twenty-front/src/modules/command-menu/hooks/useNavigateCommandMenu.ts

@@ -2,8 +2,7 @@ import { COMMAND_MENU_COMPONENT_INSTANCE_ID } from '@/command-menu/constants/Com
 import { SIDE_PANEL_FOCUS_ID } from '@/command-menu/constants/SidePanelFocusId';
 import { useCommandMenuCloseAnimationCompleteCleanup } from '@/command-menu/hooks/useCommandMenuCloseAnimationCompleteCleanup';
 import { useCopyContextStoreStates } from '@/command-menu/hooks/useCopyContextStoreAndActionMenuStates';
-import { commandMenuNavigationMorphItemByPageState } from '@/command-menu/states/commandMenuNavigationMorphItemsState';
-import { commandMenuNavigationRecordsState } from '@/command-menu/states/commandMenuNavigationRecordsState';
+import { commandMenuNavigationMorphItemsByPageState } from '@/command-menu/states/commandMenuNavigationMorphItemsByPageState';
 import { commandMenuNavigationStackState } from '@/command-menu/states/commandMenuNavigationStackState';
 import { commandMenuPageInfoState } from '@/command-menu/states/commandMenuPageInfoState';
 import { commandMenuPageState } from '@/command-menu/states/commandMenuPageState';
@@ -122,8 +121,7 @@ export const useNavigateCommandMenu = () => {
             },
           ]);
 
-          set(commandMenuNavigationRecordsState, []);
-          set(commandMenuNavigationMorphItemByPageState, new Map());
+          set(commandMenuNavigationMorphItemsByPageState, new Map());
         } else {
           set(commandMenuNavigationStackState, [
             ...currentNavigationStack,