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/dist/jsx/constants.js

@@ -0,0 +1,15 @@
+// src/jsx/constants.ts
+var DOM_RENDERER = /* @__PURE__ */ Symbol("RENDERER");
+var DOM_ERROR_HANDLER = /* @__PURE__ */ Symbol("ERROR_HANDLER");
+var DOM_STASH = /* @__PURE__ */ Symbol("STASH");
+var DOM_INTERNAL_TAG = /* @__PURE__ */ Symbol("INTERNAL");
+var DOM_MEMO = /* @__PURE__ */ Symbol("MEMO");
+var PERMALINK = /* @__PURE__ */ Symbol("PERMALINK");
+export {
+  DOM_ERROR_HANDLER,
+  DOM_INTERNAL_TAG,
+  DOM_MEMO,
+  DOM_RENDERER,
+  DOM_STASH,
+  PERMALINK
+};