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/api/routes/system.py

@@ -11,6 +11,7 @@ from wled_controller.api.schemas.system import (
     DisplayInfo,
     DisplayListResponse,
     HealthResponse,
+    ProcessListResponse,
     VersionResponse,
 )
 from wled_controller.core.capture.screen_capture import get_available_displays
@@ -91,3 +92,24 @@ async def get_displays(_: AuthRequired):
             status_code=500,
             detail=f"Failed to retrieve display information: {str(e)}"
         )
+
+
+@router.get("/api/v1/system/processes", response_model=ProcessListResponse, tags=["Config"])
+async def get_running_processes(_: AuthRequired):
+    """Get list of currently running process names.
+
+    Returns a sorted list of unique process names for use in profile conditions.
+    """
+    from wled_controller.core.profiles.platform_detector import PlatformDetector
+
+    try:
+        detector = PlatformDetector()
+        processes = await detector.get_running_processes()
+        sorted_procs = sorted(processes)
+        return ProcessListResponse(processes=sorted_procs, count=len(sorted_procs))
+    except Exception as e:
+        logger.error(f"Failed to get processes: {e}")
+        raise HTTPException(
+            status_code=500,
+            detail=f"Failed to retrieve process list: {str(e)}"
+        )