fix(macos): resign WebView input focus before disposal

ui/flutter/third_party/README.md

@@ -18,8 +18,8 @@ Local native changes are limited to:
   setting and attach the profile before navigation.
 - `MyCookieManager`: route cookie operations to the requested profile, capturing
   the store per operation so asynchronous calls cannot cross profiles.
-- macOS `FlutterWebViewController`: weakly register profile views so uninstall
-  can release their WKWebViews even when Flutter retains a platform-view wrapper.
+- macOS `InAppWebView`: resign input focus before disposing a view so AppKit
+  cannot retain its profile through the responder chain after closing the page.
 
 `lib/app/rpc/webview_profile.dart` uses the existing plugin method channel and
 serializes these internal settings. No extension JavaScript API is added.

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

@@ -7,25 +7,8 @@ import FlutterMacOS
 final class GopeedProfiles {
     private static var proxyURLs: [String: String] = [:]
     private static var stores: [String: WKWebsiteDataStore] = [:]
-    private static var views: [String: NSHashTable<FlutterWebViewController>] = [:]
     static func store(_ identifier: String) -> WKWebsiteDataStore? { stores[identifier] }
 
-    static func register(_ view: FlutterWebViewController, identifier: String) {
-        let profileViews = views[identifier] ?? NSHashTable<FlutterWebViewController>.weakObjects()
-        profileViews.add(view)
-        views[identifier] = profileViews
-    }
-
-    private static func disposeViews(_ identifier: String) {
-        // Flutter may retain a removed platform-view wrapper beyond the frame
-        // boundary. Release its WKWebView now, before deleting the named store.
-        // The host has already closed all pages belonging to this profile.
-        let profileViews = views.removeValue(forKey: identifier)
-        for view in profileViews?.allObjects ?? [] {
-            view.dispose(removeFromSuperview: true)
-        }
-    }
-
     static func prepare(arguments: NSDictionary?, result: @escaping FlutterResult) {
         guard #available(macOS 14.0, iOS 17.0, *),
               let identifier = arguments?["gopeedProfileId"] as? String,
@@ -62,7 +45,6 @@ final class GopeedProfiles {
         }
         // Deleting a named store alone can leave in-process cookie caches.
         // Clear every website data type before releasing/removing the store.
-        disposeViews(identifier)
         let store = stores[identifier] ?? WKWebsiteDataStore(forIdentifier: uuid)
         store.removeData(ofTypes: WKWebsiteDataStore.allWebsiteDataTypes(), modifiedSince: Date.distantPast) {
             stores.removeValue(forKey: identifier)

ui/flutter/third_party/flutter_inappwebview_macos/macos/Classes/InAppWebView/FlutterWebViewController.swift

@@ -68,9 +68,6 @@ public class FlutterWebViewController: NSView, Disposable {
         webView!.settings = settings
         webView!.prepare()
         webView!.windowCreated = true
-        if let identifier = initialSettings["gopeedProfileId"] as? String {
-            GopeedProfiles.register(self, identifier: identifier)
-        }
     }
     
     required init?(coder nsCoder: NSCoder) {

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

@@ -2603,6 +2603,12 @@ if(window.\(JAVASCRIPT_BRIDGE_NAME)[\(_callHandlerID)] != null) {
     }
     
     public func dispose() {
+        // An edited web page can remain in AppKit's responder chain even after
+        // its headless wrapper is removed. Resign it while still in the window.
+        if let responder = window?.firstResponder as? NSView,
+           responder === self || responder.isDescendant(of: self) {
+            window?.makeFirstResponder(nil)
+        }
         channelDelegate?.dispose()
         channelDelegate = nil
         runWindowBeforeCreatedCallbacks()