Fix flutter analyze issues

This commit is replacing print with log in lib/pages/main/main_btn.dart

Author: pkongkha

lib/pages/apps/apps_list_item.dart

@@ -37,7 +37,7 @@ class AppListItem extends StatelessWidget {
           borderRadius: BorderRadius.circular(10),
           boxShadow: [
             BoxShadow(
-              color: Colors.grey.withOpacity(0.2),
+              color: Colors.grey.withValues(alpha: 0.2),
               blurRadius: 10,
               offset: const Offset(0, 1),
             ),
@@ -112,7 +112,7 @@ class AppListItem extends StatelessWidget {
             if (!isEnabled)
               Container(
                 decoration: BoxDecoration(
-                  color: Colors.grey.withOpacity(0.4),
+                  color: Colors.grey.withValues(alpha: 0.4),
                   borderRadius: BorderRadius.circular(10),
                 ),
               ),

lib/pages/main/main_btn.dart

@@ -1,4 +1,5 @@
 import 'dart:async';
+import 'dart:developer';
 import 'package:flutter/material.dart';
 import 'package:vpn_client/design/colors.dart';
 import 'package:vpn_client/design/dimensions.dart';
@@ -111,7 +112,7 @@ V2RayURL parser = FlutterV2ray.parseFromURL(link);
 
 
 // Get Server Delay
-print('${flutterV2ray.getServerDelay(config: parser.getFullConfiguration())}ms');
+log('${flutterV2ray.getServerDelay(config: parser.getFullConfiguration())}ms');
 
 // Permission is not required if you using proxy only
 if (await flutterV2ray.requestPermission()){
@@ -137,7 +138,7 @@ if (await flutterV2ray.requestPermission()){
 // >>>>>>> Stashed changes
       VPNclientEngine.pingServer(subscriptionIndex: 0, index: 1);
       VPNclientEngine.onPingResult.listen((result) {
-        print("Ping result: ${result.latencyInMs} ms");
+        log("Ping result: ${result.latencyInMs} ms");
       });
 
 

lib/pages/servers/servers_list_item.dart

@@ -41,7 +41,7 @@ class ServerListItem extends StatelessWidget {
           borderRadius: BorderRadius.circular(10),
           boxShadow: [
             BoxShadow(
-              color: Colors.grey.withOpacity(0.2),
+              color: Colors.grey.withValues(alpha: 0.2),
               blurRadius: 10,
               offset: const Offset(0, 1),
             ),

lib/search_dialog.dart

@@ -174,7 +174,7 @@ class _SearchDialogState extends State<SearchDialog> {
                   borderRadius: BorderRadius.circular(10),
                   boxShadow: [
                     BoxShadow(
-                      color: Colors.grey.withOpacity(0.2),
+                      color: Colors.grey.withValues(alpha: 0.2),
                       blurRadius: 10,
                       offset: const Offset(0, 1),
                     ),
@@ -356,4 +356,4 @@ class _SearchDialogState extends State<SearchDialog> {
       ),
     );
   }
-}
+}