refactor: migrate proxy setting guard to sysproxy-rs crate (#5287)

* Refactor proxy management: Remove EventDrivenProxyManager and async_proxy_query

- Removed the EventDrivenProxyManager and its related event-driven proxy management logic.
- Replaced usages of AsyncProxyQuery with direct calls to sysproxy for fetching system and auto proxy configurations.
- Cleaned up constants by removing unused default proxy host.
- Updated sysopt to eliminate calls to the removed EventDrivenProxyManager.
- Adjusted logging and proxy state management to reflect the removal of event-driven architecture.
- Simplified the core module structure by removing unnecessary module imports.

* refactor: remove bypass module for cleaner network configuration

* feat: update sysproxy to version 0.4.0 and add guard feature; refactor sysopt for improved proxy management

* feat(windows/sysproxy): unify guard-type handling and auto-restore drift

* refactor(config): remove commented-out code for SysProxy update flag

---------

Co-authored-by: Slinetrac <realakayuki@gmail.com>

src-tauri/src/lib.rs

@@ -14,7 +14,7 @@ use crate::constants::files;
 #[cfg(target_os = "linux")]
 use crate::utils::linux;
 use crate::{
-    core::{EventDrivenProxyManager, handle},
+    core::handle,
     process::AsyncHandler,
     utils::{resolve, server},
 };
@@ -440,7 +440,6 @@ pub fn run() {
             let handle = core::handle::Handle::global();
             if !handle.is_exiting() {
                 handle.set_is_exiting();
-                EventDrivenProxyManager::global().notify_app_stopping();
                 feat::clean();
             }
         }