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>

lib/cache/index.ts

@@ -57,8 +57,8 @@ export class CacheManager {
   }
 
   // Helper methods for specific cache patterns
-  static getChapterKey(bookId: string, chapterNum: number): string {
-    return `chapter:${bookId}:${chapterNum}`
+  static getChapterKey(bookId: string, chapterNum: number, versionId?: string): string {
+    return versionId ? `chapter:${bookId}:${chapterNum}:${versionId}` : `chapter:${bookId}:${chapterNum}`
   }
 
   static getSearchKey(query: string, limit: number): string {