Fixed some proton 7 path issues and the override in settings.

ptlinux/doctor.py

@@ -11,6 +11,7 @@ import shutil
 from typing import Mapping
 
 from .launcher import find_wine_tools
+from .runtime import find_steam_proton7
 
 
 ARCH_FAMILY_DISTRIBUTIONS = frozenset(
@@ -176,19 +177,7 @@ def _package_hint(distribution: str) -> str | None:
 
 
 def _has_steam_proton7(environment: Mapping[str, str]) -> bool:
-	home_value = environment.get("HOME")
-	if not home_value:
-		return False
-	home = Path(home_value)
-	for steam_root in (
-		home / ".local/share/Steam",
-		home / ".steam/steam",
-		home / "snap/steam/common/.local/share/Steam",
-		home / ".var/app/com.valvesoftware.Steam/.local/share/Steam",
-	):
-		if (steam_root / "steamapps/common/Proton 7.0/proton").is_file():
-			return True
-	return False
+	return find_steam_proton7(environment) is not None
 
 
 def _platform_optional_tools(distribution: str, *, architecture: str) -> list[ToolStatus]: