🏛️ Major Refactor: Modern Modular Architecture
Cortex v1.2.0 has been rebuilt from the ground up with a modern, modular architecture. This major refactor moves away from a single, monolithic file structure. Logic is now separated into dedicated modules, including:

React Hooks for state management (e.g., useSettings, useTheme, useCategories).

Reusable Components for UI (e.g., BookmarkCard, Header, ConfirmDialog).

Service Utilities for logic (e.g., storage.js, validation.js, indexedDB.js).

For you, this new architecture means a faster, more stable, and more responsive application. It also provides a foundation for new features to be developed and shipped more quickly and reliably.

🚀 Major Feature: IndexedDB Storage Migration
The application's storage layer has been migrated from localStorage to IndexedDB for significantly better performance and scalability.

New DB Engine: The app now initializes cortexDB (an IndexedDB wrapper) on startup.

Storage Adapter: A new StorageAdapter (storage-adapter.js) manages all communication with the database.

Fallback & Migration: The app first attempts to load all data from IndexedDB. If it's empty, it falls back to loading from localStorage (for existing users) and will save to IndexedDB on the next update.

Intelligent Sync: Data saving now uses a "full sync" logic, comparing existing and new records to perform only the necessary add, update, or delete operations.

🔒 Security & Validation Hardening
Security and data integrity have been significantly improved with new validation utilities.

Destructive Action Confirmation: The ConfirmDialog.js component now supports a requireConfirmation prop. The user must type a confirmation string (e.g., "DELETE") to activate the "Confirm" button.

Prototype Pollution Protection: A SecurityHelpers.secureClone utility has been added to validation.js to safely clone objects during import and prevent prototype pollution attacks.

Stricter Validation Rules: URLValidator now lists ssh and telnet as safe protocols, and TextSanitizer for tags is now stricter.
💅 UI & UX Enhancements
Vertical Card Layout: BookmarkCard.js now supports a new "vertical" card layout, offering a different visual style for your bookmarks.

Hover Effects: The app now supports multiple hover effects (e.g., 'border', 'subtle'), which can be changed in the settings.

🐛 Bug Fixes
- Fixed bookmark category change not working when editing bookmarks
- Category selector now properly displayed in edit mode
- Bookmarks can now be moved between different categories during editing