fix(webview): suppress GTK fallback error document events

go.mod

@@ -4,7 +4,7 @@ go 1.25.4
 
 require (
 	codeberg.org/gruf/go-ffmpreg v0.6.23-0.20260827095416-df1836cb5be0
-	github.com/GopeedLab/webview_go v0.0.0-20260917163929-ca26c3e6bcfa
+	github.com/GopeedLab/webview_go v0.0.0-20260918010912-0d4c27bb7914
 	github.com/anacrolix/torrent v1.60.1-0.20251217073903-486bcbe758e0
 	github.com/armon/go-socks5 v0.0.0-20160902184237-e75332964ef5
 	github.com/bodgit/sevenzip v1.6.1

go.sum

@@ -37,6 +37,8 @@ github.com/GopeedLab/webview_go v0.0.0-20260917161756-2a4f989dcb1d h1:4fjlhJpBWa
 github.com/GopeedLab/webview_go v0.0.0-20260917161756-2a4f989dcb1d/go.mod h1:oNO07SCX8xgoHLds2OBwML8TU4xils88vMQ4gadKUHQ=
 github.com/GopeedLab/webview_go v0.0.0-20260917163929-ca26c3e6bcfa h1:VkdBMcNHYTqCMwOOCimA7b3xZKV/qFIGrhh3+vm9n3s=
 github.com/GopeedLab/webview_go v0.0.0-20260917163929-ca26c3e6bcfa/go.mod h1:oNO07SCX8xgoHLds2OBwML8TU4xils88vMQ4gadKUHQ=
+github.com/GopeedLab/webview_go v0.0.0-20260918010912-0d4c27bb7914 h1:9VJQZIZ1R6T4m+4vlNQYNXSPNUv2gf2PiTfIXiQ3MTw=
+github.com/GopeedLab/webview_go v0.0.0-20260918010912-0d4c27bb7914/go.mod h1:oNO07SCX8xgoHLds2OBwML8TU4xils88vMQ4gadKUHQ=
 github.com/Masterminds/semver/v3 v3.2.1 h1:RN9w6+7QoMeJVGyfmbcgs28Br8cvmnucEXnY0rYXWg0=
 github.com/Masterminds/semver/v3 v3.2.1/go.mod h1:qvl/7zhW3nngYb5+80sSMF+FG2BjYrf8m9wsX0PNOMQ=
 github.com/Microsoft/go-winio v0.5.2/go.mod h1:WpS1mjBmmwHBEWmogvA2mj8546UReBk4v8QkMxJ6pZY=

internal/webview/integrationtest/events.go

@@ -98,6 +98,7 @@ func RunEventContract(t *testing.T, provider wv.Provider) {
 	if e.Data["message"] == "" || !strings.Contains(fmt.Sprint(e.Data["url"]), "/failure") {
 		t.Fatal(e)
 	}
+	quiet() // A handled failure must not load a browser-generated fallback page.
 	if err := page.Close(); err != nil {
 		t.Fatal(err)
 	}