Context

Closes: #49

Summary

Major changes:

• 2,338 deletions, 1,128 additions - Net reduction of ~1,200 lines
• Database schema refactor: Replaced complex block.schema.ts (347 lines) with simpler block-node.schema.ts (99 lines) and new document.schema.ts
• API simplification: Heavily reduced blocks.ts and pages.ts routers
• Editor consolidation: Removed 6 custom hook files and utilities, simplified to single block-editor.tsx
• Cleanup: Removed test BlockNote components
• New components: Added page-title-input.tsx and page-editor.dynamic.tsx

Key architectural changes:

• Moved from complex nested block system to simpler document-based approach
• Consolidated editor logic from multiple hooks into single component
• Added new document router and block-note-tree utility