Add profile system for automatic target activation

Profiles monitor running processes and foreground windows to
automatically start/stop targets when conditions are met.
Includes profile engine, platform detector (WMI), REST API,
process browser endpoint, and calibration persistence fix.

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

server/src/wled_controller/storage/device_store.py

@@ -243,7 +243,6 @@ class DeviceStore:
             device.url = url
         if led_count is not None:
             device.led_count = led_count
-            device.calibration = create_default_calibration(led_count)
         if enabled is not None:
             device.enabled = enabled
         if baud_rate is not None: