Preserve existing profile connections when opening more pages

ui/flutter/lib/app/rpc/webview_rpc_service.dart

@@ -3,6 +3,7 @@ import 'dart:collection';
 import 'dart:convert';
 
 import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
 import 'package:flutter_inappwebview/flutter_inappwebview.dart';
 
 import '../../core/common/start_config.dart';
@@ -273,6 +274,9 @@ class WebViewRpcService {
     if (error is WebViewRpcException) {
       return {'code': error.code, 'message': error.message};
     }
+    if (error is PlatformException && error.code == 'UNAVAILABLE') {
+      return {'code': error.code, 'message': error.message ?? 'WebView is unavailable'};
+    }
     final code = switch (method) {
       'page.goto' => 'NAVIGATION_FAILED',
       'page.execute' => 'EVALUATION_FAILED',

ui/flutter/third_party/flutter_inappwebview_android/android/src/main/java/com/pichillilorenzo/flutter_inappwebview_android/GopeedProfiles.java

@@ -10,6 +10,9 @@ import io.flutter.plugin.common.MethodChannel;
 
 // Internal host bridge: profile creation and proxy completion precede navigation.
 final class GopeedProfiles {
+  private static String appliedProxy;
+  private static String pendingProxy;
+  private static final java.util.List<MethodChannel.Result> pending = new java.util.ArrayList<>();
   static void prepare(MethodCall call, MethodChannel.Result result) {
     if (!WebViewFeature.isFeatureSupported(WebViewFeature.MULTI_PROFILE) ||
         !WebViewFeature.isFeatureSupported(WebViewFeature.PROXY_OVERRIDE)) {
@@ -24,10 +27,29 @@ final class GopeedProfiles {
       if (!"http".equals(uri.getScheme()) || !"127.0.0.1".equals(uri.getHost()) || uri.getPort() <= 0)
         throw new IllegalArgumentException("Invalid host proxy configuration");
       ProfileStore.getInstance().getOrCreateProfile(id);
+      if (proxy.equals(appliedProxy)) { result.success(true); return; }
+      if (pendingProxy != null) {
+        if (proxy.equals(pendingProxy)) pending.add(result);
+        else result.error("UNAVAILABLE", "A different WebView proxy is being configured", null);
+        return;
+      }
+      pendingProxy = proxy;
+      pending.add(result);
       ProxyConfig config = new ProxyConfig.Builder().addProxyRule(proxy).removeImplicitRules().build();
-      ProxyController.getInstance().setProxyOverride(config, Runnable::run, () -> result.success(true));
+      ProxyController.getInstance().setProxyOverride(config, task -> new android.os.Handler(android.os.Looper.getMainLooper()).post(task), () -> {
+        appliedProxy = proxy;
+        pendingProxy = null;
+        java.util.List<MethodChannel.Result> completed = new java.util.ArrayList<>(pending);
+        pending.clear();
+        for (MethodChannel.Result callback : completed) callback.success(true);
+      });
     } catch (RuntimeException e) {
-      result.error("UNAVAILABLE", "Unable to configure WebView profile and proxy", null);
+      if (pendingProxy != null && pending.contains(result)) {
+        pendingProxy = null;
+        java.util.List<MethodChannel.Result> failed = new java.util.ArrayList<>(pending);
+        pending.clear();
+        for (MethodChannel.Result callback : failed) callback.error("UNAVAILABLE", "Unable to configure WebView profile and proxy", null);
+      } else result.error("UNAVAILABLE", "Unable to configure WebView profile and proxy", null);
     }
   }
 }

ui/flutter/third_party/flutter_inappwebview_ios/ios/Classes/GopeedProfiles.swift

@@ -5,6 +5,7 @@ import Network
 import Flutter
 
 final class GopeedProfiles {
+    private static var proxyURLs: [String: String] = [:]
     private static var stores: [String: WKWebsiteDataStore] = [:]
     static func store(_ identifier: String) -> WKWebsiteDataStore? { stores[identifier] }
 
@@ -19,11 +20,16 @@ final class GopeedProfiles {
             result(FlutterError(code: "UNAVAILABLE", message: "Isolated WebView profiles and proxy require macOS 14 / iOS 17 or newer and valid host configuration", details: nil))
             return
         }
+        if stores[identifier] != nil && proxyURLs[identifier] == proxyURL {
+            result(true)
+            return
+        }
         let store = stores[identifier] ?? WKWebsiteDataStore(forIdentifier: uuid)
         let endpoint = nw_endpoint_create_host(host, String(port))
         let proxy = nw_proxy_config_create_socksv5(endpoint)
         store.__proxyConfigurations = [proxy]
         stores[identifier] = store
+        proxyURLs[identifier] = proxyURL
         result(true)
     }
 }

ui/flutter/third_party/flutter_inappwebview_macos/macos/Classes/GopeedProfiles.swift

@@ -5,6 +5,7 @@ import Network
 import FlutterMacOS
 
 final class GopeedProfiles {
+    private static var proxyURLs: [String: String] = [:]
     private static var stores: [String: WKWebsiteDataStore] = [:]
     static func store(_ identifier: String) -> WKWebsiteDataStore? { stores[identifier] }
 
@@ -19,11 +20,16 @@ final class GopeedProfiles {
             result(FlutterError(code: "UNAVAILABLE", message: "Isolated WebView profiles and proxy require macOS 14 / iOS 17 or newer and valid host configuration", details: nil))
             return
         }
+        if stores[identifier] != nil && proxyURLs[identifier] == proxyURL {
+            result(true)
+            return
+        }
         let store = stores[identifier] ?? WKWebsiteDataStore(forIdentifier: uuid)
         let endpoint = nw_endpoint_create_host(host, String(port))
         let proxy = nw_proxy_config_create_socksv5(endpoint)
         store.__proxyConfigurations = [proxy]
         stores[identifier] = store
+        proxyURLs[identifier] = proxyURL
         result(true)
     }
 }

ui/flutter/tool/webview_profile_check.dart

@@ -97,6 +97,7 @@ Future<void> checkProfiles() async {
   final target = WebUri('https://profiles.invalid/');
   final pages = <HeadlessInAppWebView>[];
   Future<InAppWebViewController> open(WebViewProfile profile) async {
+    await profile.prepare(proxyUrl);
     final ready = Completer<InAppWebViewController>();
     final page = HeadlessInAppWebView(
       onReceivedServerTrustAuthRequest: (_, _) async =>