Add comprehensive page management system to admin dashboard

Features added:
- Database schema for pages and media files with content types (Rich Text, HTML, Markdown)
- Admin API routes for full page CRUD operations
- Image upload functionality with file management
- Rich text editor using TinyMCE with image insertion
- Admin interface for creating/editing pages with SEO options
- Dynamic navigation and footer integration
- Public page display routes with proper SEO metadata
- Support for featured images and content excerpts

Admin features:
- Create/edit/delete pages with rich content editor
- Upload and manage images through media library
- Configure pages to appear in navigation or footer
- Set page status (Draft, Published, Archived)
- SEO title and description management
- Real-time preview of content changes

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

components/admin/layout/admin-layout.tsx

@@ -31,7 +31,8 @@ import {
   Logout,
   AccountCircle,
   AdminPanelSettings,
-  Launch as LaunchIcon
+  Launch as LaunchIcon,
+  Article as PageIcon
 } from '@mui/icons-material';
 
 interface AdminLayoutProps {
@@ -49,6 +50,7 @@ const drawerWidth = 280;
 const menuItems = [
   { text: 'Dashboard', icon: Dashboard, href: '/admin' },
   { text: 'Users', icon: People, href: '/admin/users' },
+  { text: 'Pages', icon: PageIcon, href: '/admin/pages' },
   { text: 'Content Moderation', icon: Gavel, href: '/admin/content' },
   { text: 'Analytics', icon: Analytics, href: '/admin/analytics' },
   { text: 'Chat Monitoring', icon: Chat, href: '/admin/chat' },