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/zod-to-json-schema/postcjs.ts

@@ -0,0 +1,3 @@
+import { writeFileSync } from "fs";
+
+writeFileSync("./dist/cjs/package.json", '{"type":"commonjs"}', "utf-8");