fix: replace by the root value to match bash behavior

Author: doubleailes

crates/spfs/src/runtime/storage.rs

@@ -446,8 +446,8 @@ impl Config {
             csh_startup_file: root.join(Self::CSH_STARTUP_FILE),
             csh_expect_file: Self::default_csh_expect_file(),
             ps_startup_file: temp_dir().join(Self::PS_STARTUP_FILE),
-            nu_env_file: temp_dir().join(Self::NU_ENV_FILE),
-            nu_config_file: temp_dir().join(Self::NU_CONFIG_FILE),
+            nu_env_file: root.join(Self::NU_ENV_FILE),
+            nu_config_file: root.join(Self::NU_CONFIG_FILE),
             runtime_dir: Some(root),
             tmpfs_size,
             mount_namespace: None,