fix: sanitize settings JSON, asyncio get_running_loop, Defender exclusion, _btn cleanup, ASCII Save label

Made-with: Cursor

proxy_chain_manager/gost_util.py

@@ -22,9 +22,13 @@ GOST_RELEASE_ZIP = (
 def _add_defender_exclusion(path: Path) -> None:
     """Add Windows Defender exclusion so GOST is not quarantined."""
     try:
+        # ExclusionPath covers gost.exe under this folder; avoid invalid combined params on older builds.
+        folder = str(path.parent).replace("'", "''")
         subprocess.run(
-            ["powershell", "-NoProfile", "-NonInteractive", "-Command",
-             f"Add-MpPreference -ExclusionPath '{path.parent}' -ExclusionProcess 'gost.exe' -ErrorAction SilentlyContinue"],
+            [
+                "powershell", "-NoProfile", "-NonInteractive", "-Command",
+                f"Add-MpPreference -ExclusionPath '{folder}' -ErrorAction SilentlyContinue",
+            ],
             capture_output=True,
             timeout=30,
             creationflags=getattr(subprocess, "CREATE_NO_WINDOW", 0),