Topics homepage interface redesign

[saranglove]

Current cards:

Proposed redesign (wireframe):

This would eliminate the extra step of going into a topic's page in order to access UP/lessons.

Current flow:

(Where the page circled in red is unnecessary)

Proposed flow:

(Where the step circled in blue would replace the topic's homepage, and the unit plan would be separated to a different page.)

**Content structure may be needed for topics with more than one unit plan.