Back button at the top not functioning on Items screen

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Describe the bug
The back button located at the top of the Items screen is not working. When tapped, it does not navigate back to the previous screen, which affects user navigation and overall app usability.

To Reproduce
Steps to reproduce the behavior:

Open the Enatega Multivendor app.
Navigate to the Items screen.
Tap the back button (top-left arrow icon).
Observe that the app does not navigate to the previous screen and remains on the current page.
Expected behavior
Tapping the back button should navigate the user back to the previous screen.

Desktop (please complete the following information):

OS: [e.g. iOS]
Browser [e.g. chrome, safari]
Version [e.g. 22]
Smartphone (please complete the following information):

Device: [e.g. iPhone6]
OS: [e.g. iOS8.1]
Browser [e.g. stock browser, safari]
Version [e.g. 22]
Additional context
Add any other context about the problem here.

Labels: Enatega Multivendor Customer App, Bug

Start by reproducing the failure on the Items screen and trace the top-left back-button entry point in the React Native app. Confirm the navigation handler and surrounding screen flow, then verify that tapping the button returns to the previous screen.

Written by the indexing model from the issue text.