refactor(profile): remove identical blind retry when switching node

The second select_node_for_group call in switch_proxy_node was a
zero-interval retry with identical arguments. Its success path was a
degraded copy of the first (missing the Refresh::Proxies announcement
ever since the old force-refresh emit was removed), and its distinct
"回退/最终失败" log wording misled maintainers. Keep a single call,
the primary success aftermath, and one error log.

src-tauri/src/feat/profile.rs

@@ -47,26 +47,11 @@ pub async fn switch_proxy_node(group_name: &str, proxy_name: &str) {
             record_switched_node(group_name, proxy_name).await;
             announce(Refresh::Proxies);
             let _ = tray::Tray::global().update_menu().await;
-            return;
         }
         Err(err) => {
             logging!(error, Type::Tray, "切换代理失败: {err:?}");
         }
     }
-
-    match handle::Handle::mihomo()
-        .select_node_for_group(group_name, proxy_name)
-        .await
-    {
-        Ok(_) => {
-            logging!(info, Type::Tray, "代理切换回退成功: {} -> {}", group_name, proxy_name);
-            record_switched_node(group_name, proxy_name).await;
-            let _ = tray::Tray::global().update_menu().await;
-        }
-        Err(err) => {
-            logging!(error, Type::Tray, "代理切换最终失败: {err:?}");
-        }
-    }
 }
 
 async fn should_update_profile(uid: &String, ignore_auto_update: bool) -> Result<Option<(String, Option<PrfOption>)>> {