Add auto flag to patterns

src/patterns_base.py

@@ -21,6 +21,7 @@ param_mapping = {
     "n4": "n4",
     "n5": "n5",
     "n6": "n6",
+    "auto": "auto",
 }
 
 class Patterns:
@@ -31,6 +32,7 @@ class Patterns:
         self.last_update = utime.ticks_ms()
         self.delay = delay
         self.brightness = brightness
+        self.auto = False
         self.patterns = {}
         self.selected = selected
         # Ensure colors list always starts with at least two for robust transition handling