fix: hide workspace dependency directories

tests/test_docker_workspace.py

@@ -56,6 +56,9 @@ async def test_real_docker_workspaces_are_isolated(settings) -> None:
         hidden = await provider.list_files(users[0], ".", 4, 100)
         assert ".agent" not in hidden.output
         assert ".venv" not in hidden.output
+        browser_listing = await provider.browse_files(users[0], ".")
+        assert ".agent" not in {entry.name for entry in browser_listing.entries}
+        assert ".venv" not in {entry.name for entry in browser_listing.entries}
 
         piped_failure = await provider.exec(users[0], "false | tail -n 1", ".", 10)
         assert not piped_failure.ok