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/function-bind/index.js

@@ -0,0 +1,5 @@
+'use strict';
+
+var implementation = require('./implementation');
+
+module.exports = Function.prototype.bind || implementation;