Problem statement

Design a simple app to show the upcoming orders for a user in a list.
Show the delivery date and time for a selected delivery in the action bar/tool bar on top of screen.

API Details

Host: https://demo2017106.mockable.io
GET api/v1/store/deliveries/upcoming
- ERROR CODES - 401 for invalid user, 404 for invalid request
- QUERY PARAMS: hub_id=2, ak=jSsxdbg89YWiAQFXFmLL

The code for app logic should preferably be 100% Kotlin.
The problem statement is designed to simulate regular work day feature building; completing each and every step is NOT a priority.
Focus on clean code while accounting for development speed with quality. Ex: If you are comfortable using Dagger or any DI library, go for it! However, that does not gain additional points.
Unit tests for some business logic is encouraged. Ex: Complete Step 1 and write some unit tests.
Please feel free to choose whatever android design pattern, UI pattern and any dependencies to accomplish this task (MVVM, MVP, Coroutines, Flows anything works!)
Please approach this as your regular work day request; commit as often as you want if that is your preferred style.
Note - completing all/any of the steps mentioned below is not a priority. Step 1 and Step 2 are as mentioned in the problem statement, and just think of Step 3 and above as additional challenges if time permits.
Note - the project skeleton files (MainActivity.kt, FirstFragment.kt etc) are just placeholders in this repo. Please feel free to modify any repo files as required.
Updating the README with some salient points on app architecture is encouraged (not required)

Main app screen should show a list of upcoming deliveries (as returned via the endpoint api/v1/store/deliveries/upcoming)
Each list item should show the delivery day, delivery date and delivery time range Ex: Mon May 2 4:00 PM - 6:00 PM
If the delivery state is instant_pending, a label "pending" should be displayed in the list item.
Tapping on back button should exit to device home screen

The app tool bar/action bar on top should display details of current selected delivery.
Toolbar UI should show the delivery day, delivery date and delivery time range Ex: Mon May 2 4:00 PM - 6:00 PM
By default on first app start, the first instant_pending delivery should be the default selected delivery.
Tapping on an item in list of upcoming deliveries should change toolbar UI to that selected delivery
The selected delivery should persist on app close. A fresh app open should show the last selected delivery in tool bar.

Each delivery in the list has order items. Show the order item images in each list item.
Show at the max 4 individual order item images in the list item. If there are more than 4 items in the delivery, add a suffix "and more items" to the images row.

Tapping on an item in list of upcoming deliveries should open a new view cart screen, for showing all items in that delivery.
The above endpoint response has order_items array for each delivery, which should contain all items in cart for that delivery
The view cart screen should show this list of order items
Each list item can show some basic item data (ex: Item name, item price, item quantity and possibly item image)
Item price would be corresponding to hub_id=2 under hub_items field
Tapping on back button in this screen should revert back to upcoming deliveries screen

Tapping on a item in view cart list should open that product detail page in a separate screen.
The product detail screen can show basic product data - ex: a larger image of the product, product name, display_size_and_measure and product price
Tapping on back button should exit back to view cart page.