change: abstract flatpak ps command

dzgui/init/proc.py

@@ -30,16 +30,19 @@ def is_steam_running(cmd: str) -> bool:
 def is_sandboxed() -> bool:
     return bool(os.environ.get("FLATPAK_ID"))
 
+def get_flatpak_output() -> list[str]:
+    proc = subprocess.check_output(
+        [FLATPAK_CMD, "ps", "--columns=application"], text=True
+    )
+    lines = proc.splitlines()
+    return lines
 
 def is_flatpak_steam_running() -> bool:
     if is_sandboxed():
         return True
     if has_cmd(FLATPAK_CMD) is False:
         return False
-    proc = subprocess.check_output(
-        [FLATPAK_CMD, "ps", "--columns=application"], text=True
-    )
-    lines = proc.splitlines()
+    lines = get_flatpak_output()
     if FLATPAK_APPID in lines:
         return True
     return False