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/ajv/dist/runtime/uri.d.ts

@@ -0,0 +1,6 @@
+import * as uri from "fast-uri";
+type URI = typeof uri & {
+    code: string;
+};
+declare const _default: URI;
+export default _default;