feat(patterns): align manual and auto behaviour

Unify manual/auto timing semantics for key patterns, add preset background support, and improve runtime observability while keeping the driver responsive under beat-triggered selects.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/settings.py

@@ -39,7 +39,6 @@ class Settings(dict):
             j = json.dumps(self)
             with open(self.SETTINGS_FILE, 'w') as file:
                 file.write(j)
-            print("Settings saved successfully.")
         except Exception as e:
             print(f"Error saving settings: {e}")
 
@@ -48,7 +47,6 @@ class Settings(dict):
             with open(self.SETTINGS_FILE, 'r') as file:
                 loaded_settings = json.load(file)
             self.update(loaded_settings)
-            print("Settings loaded successfully.")
         except Exception as e:
             print(f"Error loading settings")
             self.set_defaults()