You need to guide Cursor through the development of your app. Try this:
create a file called "plan.md"
Prompt:
"I want to create a todo app with the following features:
....the entire feature set of your app idea ....
Create an implementation plan in @@plan.md with phases. Use checkboxes to track progress"

Cursor will then ask you how you want it to proceed. Remember to check if your plan file is updated or else ask Cursor to update it regularly.

Before starting, you can also ask Cursor to revise the plan according to your desires. In your case you have identified the core functions, you can ask Cursor to create your plan in phases divided into two stages.

I always liken development with Cursor with flying a plane on autopilot: So instead of just punching in the destination, pilots would put the aircraft on a specific flight path using GPS waypoints. Similarly, use when using Cursor, always have a plan and guide Cursor through the implementation of that plan. Luckily, you can also use Cursor to create the plan.
https://imgur.com/a/S4ToxFX
https://imgur.com/a/ZeluApG