Sleep timer fades instead of stopping abruptly. Volume staysat original setting instead of saving at 0.

src/sleep_timer_menu.py

@@ -110,6 +110,19 @@ class SleepTimerMenu:
             return True
         return False
 
+    def should_start_fadeout(self):
+        """
+        Check if we should start fading out (10 seconds before timer expiration)
+
+        Returns:
+            True if we're within 10 seconds of timer expiration
+        """
+        if not self.timerActive:
+            return False
+
+        remaining = self.timerEndTime - time.time()
+        return 0 < remaining <= 10
+
     def get_time_remaining(self):
         """
         Get time remaining on sleep timer
@@ -135,6 +148,13 @@ class SleepTimerMenu:
             self.timerEndTime = None
             self.speechEngine.speak("Sleep timer cancelled")
 
+    def reset_fadeout_state(self):
+        """
+        Reset fade-out state (called when timer is cancelled or new timer set)
+        Returns the fade state so the caller can restore volume if needed
+        """
+        return {'isFadingOut': False, 'fadeStartVolume': None, 'fadeStartTime': None}
+
     def is_timer_active(self):
         """Check if sleep timer is active"""
         return self.timerActive