fix: Add debounced Undo/Redo system to avoid character-by-character history

- Add debounced state updates for title and content (500ms delay)
- Immediate UI updates with delayed history saving
- Prevent one-letter-per-undo issue
- Add cleanup for debounce timers on unmount

mcp-server/node_modules/prisma/prisma-client/sql.js

@@ -0,0 +1,4 @@
+'use strict'
+module.exports = {
+  ...require('.prisma/client/sql'),
+}