fix: false positive when Flatpak client is running

The process ultimately spawned from the Flatpak run command has the same
process name as the one expected for STEAM_CMD (essentially just the
Steam client wrapped in a Flatpak), so the old logic would return True
for is_steam_running() if the Flatpak version had already been launched.
To prevent unintended collisions and isolate launch parameters,
STEAM_CMD and FLATPAK_RUN_CMD/FLATPAK_SANDBOX should be
mutually exclusive.

dzgui/init/proc.py

@@ -16,12 +16,15 @@ logger = logging.getLogger(APP_NAME)
 
 
 def is_steam_running(cmd: str) -> bool:
-    if cmd == STEAM_CMD:
+    is_flatpak_running = is_flatpak_steam_running()
+    if cmd in (FLATPAK_RUN_CMD, FLATPAK_SANDBOX):
+        return is_flatpak_running
+    elif cmd == STEAM_CMD:
+        if is_flatpak_running:
+            return False
         if has_cmd(STEAM_CMD) is False:
             return False
         return is_running(STEAM_CMD)
-    elif cmd in (FLATPAK_RUN_CMD, FLATPAK_SANDBOX):
-        return is_flatpak_steam_running()
     else:
         raise TypeError("Not a valid Steam client selection")