refactor: reduce webview lock contention (#6271)

* refactor: replace handle::Handle::get_window() with WindowManager::get_main_window() in multiple files

* refactor: enhance WindowManager to return window state alongside the main window instance

* refactor: update useProfiles and ProfilePage to support profile overrides and improve patchProfilesConfig return type

* refactor: enhance handle_success to check main window existence before notifying profile changes

* refactor: simplify get_main_window_with_state by using pattern matching and improve window state handling

* refactor: fix window activation by removing unnecessary reference in activate_existing_main_window

* refactor: remove redundant macOS conditional for window_manager import

src-tauri/src/cmd/profile.rs

@@ -1,5 +1,6 @@
 use super::CmdResult;
 use super::StringifyErr as _;
+use crate::utils::window_manager::WindowManager;
 use crate::{
     config::{
         Config, IProfiles, PrfItem, PrfOption,
@@ -310,7 +311,9 @@ async fn handle_success(current_value: Option<&String>) -> CmdResult<bool> {
         logging!(warn, Type::Cmd, "Warning: 异步保存配置文件失败: {e}");
     }
 
-    if let Some(current) = current_value {
+    if let Some(current) = current_value
+        && WindowManager::get_main_window().is_some()
+    {
         logging!(info, Type::Cmd, "向前端发送配置变更事件: {}", current);
         handle::Handle::notify_profile_changed(current.to_owned());
     }