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/@prisma/fetch-engine/dist/downloadZip.d.ts

@@ -0,0 +1,6 @@
+export type DownloadResult = {
+    lastModified: string;
+    sha256: string | null;
+    zippedSha256: string | null;
+};
+export declare function downloadZip(url: string, target: string, progressCb?: (progress: number) => void): Promise<DownloadResult>;