no usdc, no tokens: add home page
![Simulator Screenshot - iPhone 15 Pro - 2024-06-04 at 23 04 04](https://github.com/espresso-cash/espresso-cash-public/assets/28533130/9f0efcba-d6b7-4d1b-a34b-46cfc7c4a00a)
no usdc, has tokens: main page, hide carousel
![Simulator Screenshot - iPhone 15 Pro - 2024-06-05 at 00 46 12](https://github.com/espresso-cash/espresso-cash-public/assets/28533130/e0c04df5-345a-4d52-91ff-e0fc7bf6ef44)
has usdc, no tokens: main page, show carousel
![Simulator Screenshot - iPhone 15 Pro - 2024-06-04 at 22 57 33](https://github.com/espresso-cash/espresso-cash-public/assets/28533130/430226a2-37f2-45a1-9090-219bcaa9d090)
has usdc, has tokens: main page, hide carousel
![Simulator Screenshot - iPhone 15 Pro - 2024-06-04 at 22 56 59](https://github.com/espresso-cash/espresso-cash-public/assets/28533130/b26ebb07-6a01-47f5-b377-5bfa63ae1424)
Checklist
[x] PR is ready for review (if not, it should be a draft).
Changes
fixes main screen flow
Screenshots
no usdc, no tokens: add home page
![Simulator Screenshot - iPhone 15 Pro - 2024-06-04 at 23 04 04](https://github.com/espresso-cash/espresso-cash-public/assets/28533130/9f0efcba-d6b7-4d1b-a34b-46cfc7c4a00a)no usdc, has tokens: main page, hide carousel
![Simulator Screenshot - iPhone 15 Pro - 2024-06-05 at 00 46 12](https://github.com/espresso-cash/espresso-cash-public/assets/28533130/e0c04df5-345a-4d52-91ff-e0fc7bf6ef44)has usdc, no tokens: main page, show carousel
![Simulator Screenshot - iPhone 15 Pro - 2024-06-04 at 22 57 33](https://github.com/espresso-cash/espresso-cash-public/assets/28533130/430226a2-37f2-45a1-9090-219bcaa9d090)has usdc, has tokens: main page, hide carousel
![Simulator Screenshot - iPhone 15 Pro - 2024-06-04 at 22 56 59](https://github.com/espresso-cash/espresso-cash-public/assets/28533130/b26ebb07-6a01-47f5-b377-5bfa63ae1424)Checklist