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/src/v3/tests/pipeline.test.ts

@@ -0,0 +1,29 @@
+// @ts-ignore TS6133
+import { expect, test } from "vitest";
+
+import * as z from "zod/v3";
+
+test("string to number pipeline", () => {
+  const schema = z.string().transform(Number).pipe(z.number());
+  expect(schema.parse("1234")).toEqual(1234);
+});
+
+test("string to number pipeline async", async () => {
+  const schema = z
+    .string()
+    .transform(async (val) => Number(val))
+    .pipe(z.number());
+  expect(await schema.parseAsync("1234")).toEqual(1234);
+});
+
+test("break if dirty", () => {
+  const schema = z
+    .string()
+    .refine((c) => c === "1234")
+    .transform(async (val) => Number(val))
+    .pipe(z.number().refine((v) => v < 100));
+  const r1: any = schema.safeParse("12345");
+  expect(r1.error.issues.length).toBe(1);
+  const r2: any = schema.safeParse("3");
+  expect(r2.error.issues.length).toBe(1);
+});