feat: add Clear Log button to React Native push guide

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: maratal

src/images/content/screenshots/getting-started/react-native-push-getting-started-guide.png

@@ -487,6 +487,9 @@ return (
           <Text key={i} style={styles.logEntry}>{entry}</Text>
         ))}
       </ScrollView>
+      <TouchableOpacity style={[styles.btn, styles.btnGray]} onPress={() => setLog([])}>
+        <Text style={styles.btnText}>Clear Log</Text>
+      </TouchableOpacity>
     </View>
   </SafeAreaView>
 );
@@ -504,6 +507,7 @@ btnGreen: {backgroundColor: '#28a745'},
 btnRed: {backgroundColor: '#dc3545'},
 btnPurple: {backgroundColor: '#6f42c1'},
 btnOrange: {backgroundColor: '#fd7e14'},
+btnGray: {backgroundColor: '#6c757d', marginTop: 8},
 
 ```
 </Code>