[Bug]: Incorrect back navigation to For you

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Is there a StackOverflow question about this issue?

- [x] I have searched StackOverflow

### What happened?

Back navigation always returns to For you top level screen.

Steps to reproduce:
- Navigate to For you
- Tap on a topic to see the topic screen
- Navigate to a different tab
- Tap device back button

Expected:
- For you tab selected with the Topic screen

Actual:
- For you tab with the landing screen

Notes: After returning to the For you tab, tap on the For you tab takes you to the Topic screen.


### Relevant logcat output

```shell

```

### Code of Conduct

- [x] I agree to follow this project's Code of Conduct

No file or test is named. Reproduce the flow from the For you tab, open a topic, switch tabs, and press the device back button; then trace the back-navigation and tab-state handling. Done means returning to For you preserves the selected topic screen rather than showing the landing screen.

Written by the indexing model from the issue text.