Fixed video mark as complete bug #654

[RitikBora]

This PR is raised in reponse to the issue #654

Here is what all has changed

1. In the backend route handler for the /markAsCompleted route we were parsing incorrect inputs to the zod safe parse hence resulting in a status 400.

We need to await the response and check for the inputs.

I'm attaching the screenshot of the network logs post fix

Apart from the original issue some minor changes

1. Package.json had a minor error
2. Coursecard.tsx had some minor import issue