Add device HWID support to sing-box subscriptions

src-tauri/tests/storage_tests.rs

@@ -59,6 +59,7 @@ fn roundtrips_local_singbox_config_and_subscription_cache() {
     let storage = JsonStorage::new(root.clone());
     let config = LocalSingBoxConfig {
         subscription_url: Some("https://sub.example.test/path?token=secret".to_string()),
+        device_hwid: Some("hwid-abcdef1234".to_string()),
         selected_server_tag: Some("nl-1".to_string()),
         listen_host: "127.0.0.1".to_string(),
         listen_port: 1080,
@@ -91,6 +92,10 @@ fn roundtrips_local_singbox_config_and_subscription_cache() {
         config.subscription_display_url(),
         Some("https://sub.example.test/...".to_string())
     );
+    assert_eq!(
+        config.device_hwid_display(),
+        Some("hwid...1234".to_string())
+    );
 
     cleanup(&root);
 }
@@ -104,6 +109,7 @@ fn missing_local_singbox_config_defaults_to_optional_empty_state() {
         .expect("read default local sing-box config");
 
     assert_eq!(config.subscription_url, None);
+    assert_eq!(config.device_hwid, None);
     assert_eq!(config.selected_server_tag, None);
     assert_eq!(config.listen_host, "127.0.0.1");
     assert_eq!(config.listen_port, 1080);