Remake desktop

Optimize change proxy

Optimize network check

Fix fallback issues

Optimize lots of details

lib/common/http.dart

@@ -3,6 +3,7 @@ import 'dart:io';
 import 'package:flutter/cupertino.dart';
 
 import '../state.dart';
+import 'constant.dart';
 
 class FlClashHttpOverrides extends HttpOverrides {
   @override
@@ -10,6 +11,9 @@ class FlClashHttpOverrides extends HttpOverrides {
     final client = super.createHttpClient(context);
     client.badCertificateCallback = (_, __, ___) => true;
     client.findProxy = (url) {
+      if ([localhost].contains(url.host)) {
+        return "DIRECT";
+      }
       debugPrint("find $url");
       final appController = globalState.appController;
       final port = appController.clashConfig.mixedPort;