Add presets system and convert back to Flask

- Convert from Microdot back to Flask
- Add presets system with CRUD operations
- Store presets in presets.json file
- Replace patterns section with presets grid
- Add preset editor with full configuration
- Add collapse/expand functionality to left panel
- Always show on/off presets in presets list
- Highlight active preset matching current tab settings
- Add 'Create from Current' button in preset editor

run_web.py

@@ -11,7 +11,7 @@ sys.path.insert(0, os.path.join(os.path.dirname(__file__), 'src'))
 from flask_app import app
 
 if __name__ == '__main__':
-    print("Starting Lighting Controller Web App...")
+    print("Starting Lighting Controller Web App with Flask...")
     print("Open http://localhost:5000 in your browser")
     app.run(host='0.0.0.0', port=5000, debug=True)