Back button keeps being hidden

### Bug Description Since 0.9.0.3, Thunder keeps going fullscreen so the back button is hidden. Now you have to swipe up every time before pressing back, complicating navigation. ### Expected Behaviour I want to press back to return to the main screen ### Steps to Reproduce 1. Open a post 2. Back button is hidden 3. Swipe up 4. Press back ### Additional Context _No response_ ### App Version 0.9.0.3 ### Device Oneplus Nord ### OS OxygenOS 15