[Command Menu] Fix record-selection command filtering in edit mode (#20034)

https://github.com/user-attachments/assets/fe1461c7-0d5c-4c6f-8c2e-2cf569e7de90

## What

Fix `RECORD_SELECTION` items leaking into the command menu when nothing
is selected, and unify how the menu renders in normal vs edit mode.

## The bug

`RECORD_SELECTION`-availability items were showing up even when
`numberOfSelectedRecords === 0`. New util
`doesCommandMenuItemMatchSelectionState` gates them, applied
consistently in the runtime provider and the editor.

## The refactor

`PinnedCommandMenuItemButtonsEditMode` was a 140-line near-duplicate of
`PinnedCommandMenuItemButtons` with its own (drifting) filter logic.
Killed it. Edit mode now flows through the same
`CommandMenuContextProvider` with a new `isInPreviewMode` flag — one
filter chain, one rendering path.

## Behavior in edit mode

**Header (pinned buttons in page header):**
- Runs the full filter chain — object metadata, page type, selection
state, page layout, *and the conditional availability expression*
- Buttons render at full styling but are inert via `pointer-events:
none` + `cursor: not-allowed`
- Preview now reflects exactly what users will see on the live page (not
a grayed-out approximation)

**Side panel editor:**
- New `useEditableCommandMenuItems` hook
- Same filters as runtime *minus* the conditional availability
expression and `FALLBACK` items — so it surfaces everything that's
actually configurable for this page context
- Still gates on selection state — if no records selected,
`RECORD_SELECTION` items are hidden from the editor too. Open to
feedback if we'd rather always show them so users can pin them ahead of
time.

## Misc

- `usePinnedCommandMenuItemsInlineLayout` — visible count now waits
until every item is measured before committing. Fixes a flash of wrong
counts on mount/resize
- Renamed `useCommandMenuContextApi` → `useCurrentCommandMenuContextApi`
— name now conveys it reads from the *current* scoped context store
- Copy: "Records selected" → "Record(s) selected"

packages/twenty-front/src/modules/object-record/record-update-multiple/components/__stories__/UpdateMultipleRecordsContainer.stories.tsx

@@ -1,11 +1,10 @@
-import { CommandMenuContext } from '@/command-menu-item/contexts/CommandMenuContext';
 import { EMPTY_COMMAND_MENU_CONTEXT_API } from '@/command-menu-item/constants/EmptyCommandMenuContextApi';
+import { CommandMenuContext } from '@/command-menu-item/contexts/CommandMenuContext';
 import { MAIN_CONTEXT_STORE_INSTANCE_ID } from '@/context-store/constants/MainContextStoreInstanceId';
 import { contextStoreNumberOfSelectedRecordsComponentState } from '@/context-store/states/contextStoreNumberOfSelectedRecordsComponentState';
 import { ApolloCoreClientContext } from '@/object-metadata/contexts/ApolloCoreClientContext';
 import { UpdateMultipleRecordsContainer } from '@/object-record/record-update-multiple/components/UpdateMultipleRecordsContainer';
 import { useSetAtomComponentState } from '@/ui/utilities/state/jotai/hooks/useSetAtomComponentState';
-import { useEffect } from 'react';
 import { ApolloClient, InMemoryCache } from '@apollo/client';
 import { MockLink } from '@apollo/client/testing';
 import {
@@ -14,6 +13,7 @@ import {
   type StoryObj,
 } from '@storybook/react-vite';
 import gql from 'graphql-tag';
+import { useEffect } from 'react';
 import { expect, userEvent, within } from 'storybook/test';
 import { ContextStoreDecorator } from '~/testing/decorators/ContextStoreDecorator';
 import { ObjectMetadataItemsDecorator } from '~/testing/decorators/ObjectMetadataItemsDecorator';
@@ -80,6 +80,7 @@ const meta: Meta<typeof UpdateMultipleRecordsContainer> = {
             containerType: 'index-page-dropdown',
             displayType: 'dropdownItem',
             commandMenuContextApi: EMPTY_COMMAND_MENU_CONTEXT_API,
+            isInPreviewMode: false,
           }}
         >
           <Story />