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/discriminator/index.d.ts

@@ -0,0 +1,5 @@
+import type { CodeKeywordDefinition } from "../../types";
+import { DiscrError, DiscrErrorObj } from "../discriminator/types";
+export type DiscriminatorError = DiscrErrorObj<DiscrError.Tag> | DiscrErrorObj<DiscrError.Mapping>;
+declare const def: CodeKeywordDefinition;
+export default def;