Brainstorm: What should the users can see on the homepage?

## Description

Define what information, content and features should be displayed on the homepage.

## Acceptance Criteria

- [ ] Define Information Architecture
- [ ] Define content for the identities states
- [ ] Define features/entry-points for each identity

Start with the issue's three acceptance criteria: information architecture, content for identity states, and features or entry points for each identity. Done means producing an agreed homepage definition covering all three areas, but the issue names no files, existing designs, or tests to guide the work.

Written by the indexing model from the issue text.