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/mini/package.json

@@ -0,0 +1,6 @@
+{ 
+  "type": "module",
+  "main": "./index.cjs",
+  "module": "./index.js",
+  "types": "./index.d.cts" 
+}