Add site-specific quirk for Digitec/Galaxus madness

doc/changelog.asciidoc

@@ -45,6 +45,8 @@ Fixed
   error is shown instead).
 - The default user agent now only contains the shortened Chromium version
   number, which fixes overzealous blocking on ScienceDirect.
+- New site-specific quirk to fix existing accounts showing as non-existant on
+  Digitec/Galaxus.
 - Resolved issues in userscripts:
     * `qute-bitwarden` will now prompt a re-login if its cached session has
       been invalidated since last used. (#8456)

doc/help/settings.asciidoc

@@ -2773,6 +2773,7 @@ Valid values:
  * +ua-google+
  * +ua-slack+
  * +ua-googledocs+
+ * +ua-digitecgalaxus+
  * +js-whatsapp-web+
  * +js-discord+
  * +js-string-replaceall+

qutebrowser/browser/webengine/webenginetab.py

@@ -1201,6 +1201,11 @@ class _WebEngineScripts(QObject):
                 # will be an UA quirk once we set the JS UA as well
                 name='ua-googledocs',
             ),
+            _Quirk(
+                'digitecgalaxus',
+                # will be an UA quirk once we set the JS UA as well
+                name='ua-digitecgalaxus',
+            ),
 
             _Quirk(
                 'string_replaceall',

qutebrowser/config/configdata.yml

@@ -660,6 +660,7 @@ content.site_specific_quirks.skip:
       - ua-google
       - ua-slack
       - ua-googledocs
+      - ua-digitecgalaxus
       - js-whatsapp-web
       - js-discord
       - js-string-replaceall

qutebrowser/javascript/quirks/digitecgalaxus.user.js

@@ -0,0 +1,17 @@
+// ==UserScript==
+// @include https://id.digitecgalaxus.ch/*
+// @include https://id.galaxus.eu/*
+// ==/UserScript==
+
+// Needed because their /api/v1/login/_actions/find-user endpoint claims
+// that the user does not exist (!?) with the default UA
+
+"use strict";
+
+const originalUserAgent = navigator.userAgent;
+
+Object.defineProperty(navigator, "userAgent", {
+    get() {
+        return originalUserAgent.replace(/QtWebEngine\/[\d.]+ /, "");
+    },
+});