Refactor application structure and simplify implementation

src-tauri/tests/storage_tests.rs

@@ -54,6 +54,7 @@ fn roundtrips_local_singbox_config_and_subscription_cache() {
         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()),
+        selected_server_id: Some("vless|nl-1|nl.example.test|443".to_string()),
         listen_host: "127.0.0.1".to_string(),
         listen_port: 1080,
         service_name: "ProxyWardenSingBox".to_string(),
@@ -133,6 +134,7 @@ fn reads_percent_encoded_singbox_tags_as_utf8() {
                 ]
             }),
             servers: vec![SubscriptionServer {
+                id: String::new(),
                 tag: encoded_tag.to_string(),
                 server_type: "vless".to_string(),
                 server: "nl.example.test".to_string(),
@@ -390,6 +392,7 @@ fn sample_subscription_cache() -> SubscriptionCache {
             ]
         }),
         servers: vec![SubscriptionServer {
+            id: "vless|nl-1|nl.example.test|443".to_string(),
             tag: "nl-1".to_string(),
             server_type: "vless".to_string(),
             server: "nl.example.test".to_string(),