Navbar with AI chats (#18161)

## Summary
Add Home/Chat tabs and a dedicated threads list in the navigation
drawer.

## Changes
- **Navbar tabs:** Tabs in the drawer to switch between Home and Chat
(with “New chat” button). Shown on desktop when expanded and on mobile
below the workspace selector.
- **Navbar threads list:** New `NavigationDrawerAIChatThreadsList` for
the Chat tab with date groups (Today / Yesterday / Older), thread rows
as `NavigationDrawerItem` (IconComment, title, timestamp). Shared
`useAIChatThreadClick` hook used by navbar and command menu; navbar
passes `resetNavigationStack: true`.
- **NavigationDrawerItem:** New `alwaysShowRightOptions` prop so the
timestamp is always visible (no hover-only).

---------

Co-authored-by: Etienne <45695613+etiennejouan@users.noreply.github.com>
Co-authored-by: Félix Malfait <felix@twenty.com>
Co-authored-by: Charles Bochet <charles@twenty.com>

packages/twenty-front/src/modules/navigation/components/MainNavigationDrawerScrollableItems.tsx

@@ -3,6 +3,8 @@ import { RemoteNavigationDrawerSection } from '@/object-metadata/components/Remo
 import styled from '@emotion/styled';
 import { lazy, Suspense } from 'react';
 
+import { NavigationDrawerOtherSection } from '@/navigation/components/NavigationDrawerOtherSection';
+
 const CurrentWorkspaceMemberNavigationMenuItemFoldersDispatcher = lazy(() =>
   import(
     '@/navigation-menu-item/components/CurrentWorkspaceMemberNavigationMenuItemFoldersDispatcher'
@@ -36,6 +38,7 @@ export const MainNavigationDrawerScrollableItems = () => {
         <WorkspaceNavigationMenuItemsDispatcher />
       </Suspense>
       <RemoteNavigationDrawerSection />
+      <NavigationDrawerOtherSection />
     </StyledScrollableItemsContainer>
   );
 };