Posts: Notification dot is not cleared after visiting the Posts page

**Description**

The notification dot for Posts remains visible even after the user navigates to the Posts page and views the available content.

**Steps to Reproduce**

1. Log in
2. Navigate to the Posts page.
3. Review the available posts.
4. Check the Post tab

**Actual Result**
The notification dot remains visible after visiting the Posts page.

**Expected Result**
The notification dot should be cleared once the user visits the Posts page and views the new content.

Start by reproducing the issue on the Posts page and tracing where the Posts notification dot is rendered and its state is updated. Confirm the behavior after viewing the available content; done means the dot is cleared after visiting the page and remains cleared when checking the Posts tab.

Written by the indexing model from the issue text.