update README

README.md

@@ -71,6 +71,7 @@ The application includes several optimizations for smooth performance:
 - **Smaller canvas**: 280x280px visualizations (vs 400x400px on desktop)
 - **Scroll handling**: Visualization pauses during scrolling to prevent audio stuttering
 - **Less frequent updates**: Displacement updates every 5th frame (vs 3rd on desktop)
+- **Screen Wake Lock API**: Prevents screen sleep during audio playback
 - **Screen sleep recovery**: Audio context automatically resumes after device wakes up
 - **Visibility API**: Properly handles audio context suspension/resumption
 
@@ -125,6 +126,11 @@ The app supports two methods for location input:
 The application is optimized for mobile devices with several performance enhancements:
 
 **Audio Playback:**
+- **Screen Wake Lock**: Prevents screen from sleeping while audio is playing
+  - Automatically requested when playback starts
+  - Released when playback stops or app is closed
+  - Supported on Chrome/Edge 84+, Safari 16.4+, Opera 70+
+  - Gracefully degrades on unsupported browsers (Firefox)
 - Automatic audio context recovery after screen sleep/wake
 - Handles browser audio suspension gracefully
 - Transport automatically restarts when app becomes visible
@@ -138,6 +144,7 @@ The application is optimized for mobile devices with several performance enhance
 - Running both generators simultaneously may impact performance on lower-end devices
 - Some mobile browsers may require user interaction to start audio playback
 - Audio may briefly pause during heavy scrolling or multitasking
+- Wake Lock not supported on Firefox (audio may stop when screen locks)
 
 ## Project Structure