fix(proxy): sync system proxy switch state with background highlight #5240, #5439, #5421, #4651, #4536

Fixed race condition where button state and background color would desync
during rapid toggles or slow backend responses.

Root causes:
- Button used actualState while background used configState
- toggleSystemProxy returned immediately via setTimeout(0), releasing lock
  before backend operation completed
- 100ms delay in updateProxyStatus caused visual flash

Changes:
- Unified state source: both button and background now use actualState
- Made toggleSystemProxy truly async with proper await chain
- Wrapped toggle function with useLockFn to serialize operations
- Reduced state refresh delay from 100ms to 50ms
- Fixed GuardState lock release timing for async operations
- Added proper error rollback with state refresh on failure

Resolves issue where proxy toggle button would show as off while
background remained green, or vice versa.

src/components/setting/mods/guard-state.tsx

@@ -60,6 +60,7 @@ export function GuardState<T>(props: Props<T>) {
 
       if (waitTime <= 0) {
         await onGuard(newValue, value!);
+        lockRef.current = false;
       } else {
         // debounce guard
         clearTimeout(timeRef.current);
@@ -71,6 +72,8 @@ export function GuardState<T>(props: Props<T>) {
             // 状态回退
             onChange(saveRef.current!);
             onCatch(err);
+          } finally {
+            lockRef.current = false;
           }
         }, waitTime);
       }
@@ -78,8 +81,8 @@ export function GuardState<T>(props: Props<T>) {
       // 状态回退
       onChange(saveRef.current!);
       onCatch(err);
+      lockRef.current = false;
     }
-    lockRef.current = false;
   };
   const { children: nestedChildren, ...restProps } = childProps;
 

src/components/shared/ProxyControlSwitches.tsx

@@ -123,7 +123,7 @@ const ProxyControlSwitches = ({
   const sysproxyRef = useRef<DialogRef>(null);
   const tunRef = useRef<DialogRef>(null);
 
-  const { enable_tun_mode, enable_system_proxy } = verge ?? {};
+  const { enable_tun_mode } = verge ?? {};
 
   const showErrorNotice = useCallback(
     (msg: string) => showNotice.error(msg),
@@ -175,7 +175,7 @@ const ProxyControlSwitches = ({
           onInfoClick={() => sysproxyRef.current?.open()}
           onToggle={(value) => toggleSystemProxy(value)}
           onError={onError}
-          highlight={enable_system_proxy}
+          highlight={systemProxyActualState}
         />
       )}
 

src/hooks/use-system-proxy-state.ts

@@ -1,3 +1,4 @@
+import { useLockFn } from "ahooks";
 import useSWR, { mutate } from "swr";
 import { closeAllConnections } from "tauri-plugin-mihomo-api";
 
@@ -41,31 +42,30 @@ export const useSystemProxyState = () => {
     }
   };
 
-  const updateProxyStatus = async () => {
-    await new Promise((resolve) => setTimeout(resolve, 100));
+  const updateProxyStatus = async (isEnabling: boolean) => {
+    // 关闭时更快响应，开启时等待系统确认
+    const delay = isEnabling ? 20 : 10;
+    await new Promise((resolve) => setTimeout(resolve, delay));
     await mutate("getSystemProxy");
     await mutate("getAutotemProxy");
   };
 
-  const toggleSystemProxy = (enabled: boolean) => {
+  const toggleSystemProxy = useLockFn(async (enabled: boolean) => {
     mutateVerge({ ...verge, enable_system_proxy: enabled }, false);
 
-    setTimeout(async () => {
-      try {
-        if (!enabled && verge?.auto_close_connection) {
-          closeAllConnections();
-        }
-        await patchVerge({ enable_system_proxy: enabled });
-
-        updateProxyStatus();
-      } catch (error) {
-        console.warn("[useSystemProxyState] toggleSystemProxy failed:", error);
-        mutateVerge({ ...verge, enable_system_proxy: !enabled }, false);
+    try {
+      if (!enabled && verge?.auto_close_connection) {
+        await closeAllConnections();
       }
-    }, 0);
-
-    return Promise.resolve();
-  };
+      await patchVerge({ enable_system_proxy: enabled });
+      await updateProxyStatus(enabled);
+    } catch (error) {
+      console.warn("[useSystemProxyState] toggleSystemProxy failed:", error);
+      mutateVerge({ ...verge, enable_system_proxy: !enabled }, false);
+      await updateProxyStatus(!enabled);
+      throw error;
+    }
+  });
 
   return {
     actualState: getSystemProxyActualState(),