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/@hono/node-server/dist/server.d.mts

@@ -0,0 +1,10 @@
+import { AddressInfo } from 'node:net';
+import { Options, ServerType } from './types.mjs';
+import 'node:http';
+import 'node:http2';
+import 'node:https';
+
+declare const createAdaptorServer: (options: Options) => ServerType;
+declare const serve: (options: Options, listeningListener?: (info: AddressInfo) => void) => ServerType;
+
+export { createAdaptorServer, serve };