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/vocabularies/jtd/index.d.ts

@@ -0,0 +1,10 @@
+import type { Vocabulary } from "../../types";
+import { JTDTypeError } from "./type";
+import { JTDEnumError } from "./enum";
+import { JTDElementsError } from "./elements";
+import { JTDPropertiesError } from "./properties";
+import { JTDDiscriminatorError } from "./discriminator";
+import { JTDValuesError } from "./values";
+declare const jtdVocabulary: Vocabulary;
+export default jtdVocabulary;
+export type JTDErrorObject = JTDTypeError | JTDEnumError | JTDElementsError | JTDPropertiesError | JTDDiscriminatorError | JTDValuesError;