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/get-platform/dist/assertNodeAPISupported.d.ts

@@ -0,0 +1,4 @@
+/**
+ * Determines whether Node API is supported on the current platform and throws if not
+ */
+export declare function assertNodeAPISupported(): void;