Add admin panel workspace detail page with chat viewer (#19579)

## Overview
Adds comprehensive admin panel functionality for viewing workspace
details and AI chat threads.

## Changes

### Frontend
- **New Routes**: Added `AdminPanelWorkspaceDetail` and
`AdminPanelWorkspaceChatThread` pages with lazy loading
- **New Queries**: 
  - `getAdminWorkspaceChatThreads` - fetch chat threads for a workspace
  - `getAdminChatThreadMessages` - fetch messages for a specific thread
  - `workspaceLookupAdminPanel` - lookup workspace info and users
- **New Components**:
- `SettingsAdminWorkspaceDetail` - displays workspace info and chat
sessions tabs
- `SettingsAdminWorkspaceChatThread` - renders chat conversation with
message bubbles
- **Navigation**: Updated AI admin panel to link to workspace detail
pages
- **Settings Paths**: Added `AdminPanelWorkspaceDetail` and
`AdminPanelWorkspaceChatThread` paths

### Backend
- **New DTOs**:
  - `AdminWorkspaceChatThreadDTO` - workspace chat thread data
  - `AdminChatThreadMessagesDTO` - thread with messages
  - `AdminChatMessageDTO` - individual message with parts
- **New Resolvers**: Added three queries to `AdminPanelResolver`
- **New Service Methods**:
  - `workspaceLookup()` - fetch workspace info
  - `getWorkspaceChatThreads()` - list chat threads
  - `getChatThreadMessages()` - fetch thread messages with validation
- **Module Updates**: Added entity imports for workspace, user, AI chat,
and feature flag data

### Security
- Added `allowImpersonation` check before accessing chat data
- Validates workspace ownership and access permissions

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

packages/twenty-front/src/modules/settings/admin-panel/graphql/queries/adminPanelRecentUsers.ts

@@ -0,0 +1,15 @@
+import { gql } from '@apollo/client';
+
+export const ADMIN_PANEL_RECENT_USERS = gql`
+  query AdminPanelRecentUsers($searchTerm: String) {
+    adminPanelRecentUsers(searchTerm: $searchTerm) {
+      id
+      email
+      firstName
+      lastName
+      createdAt
+      workspaceName
+      workspaceId
+    }
+  }
+`;