refactor: verplaats run() duplicaat naar common.py

run() stond identiek in app.py en app_system.py. Verplaatst naar
common.py als single source of truth; beide modules importeren
nu de centrale versie.

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

control/app.py

@@ -1,4 +1,3 @@
-import subprocess
 from app_images import init_images_router
 from app_files import init_files_router
 from app_pods import init_pods_router
@@ -9,6 +8,7 @@ from fastapi import FastAPI
 import requests_unixsocket
 from common import (
     _systemctl as _common_systemctl,
+    run,
 )
 import uvicorn
 
@@ -44,13 +44,5 @@ app.include_router(init_pods_router(
 app.include_router(init_system_router(SESSION, PODMAN_API_BASE, WORKLOADS_DIR))
 
 
-def run(cmd):
-    try:
-        result = subprocess.run(cmd, capture_output=True, text=True, check=False)
-        output = (result.stdout or "") + (result.stderr or "")
-        return result.returncode, output.strip()
-    except Exception as e:
-        return 1, str(e)
-
 if __name__ == "__main__":
     uvicorn.run(app, host="0.0.0.0", port=8000)