[ADMIN] Showcase and test admin designs with Rizzies

### Design work description and context:

Show designs worked on as part of #34 .

### Acceptance Criteria:
- [ ] Login
- [ ] Dashboard
- [ ] Inventory

### Dependencies:
- Related to: [link research ticket]
- Blocked by
- Blocking

### Relevant documentation as reference:
[insert links]
[synthesis document/mural]

### Definition of Ready: Design Prototype ticket

- [ ] Acceptance criteria are included
- [ ] relevant documentation to context is linked

### Definition of Done: Design Prototype ticket
- [ ] User Tests scheduled
- [ ] Scripts prepared
- [ ] Synthesis document/mural

#### PO Review pipeline:
- [ ] Acceptance criteria are checked by Product Owner
- [ ] Approved by Product Owner