feat(KUI-1400): upgrade kth/style

package.json

@@ -34,7 +34,7 @@
     "@kth/monitor": "^4.3.1",
     "@kth/server": "^4.1.0",
     "@kth/session": "^3.0.9",
-    "@kth/style": "^0.18.12",
+    "@kth/style": "^1.3.0",
     "@kth/ug-rest-api-helper": "^1.0.26",
     "axios": "^1.7.2",
     "body-parser": "^1.20.2",

server/views/helpers/index.js

@@ -1,5 +1,5 @@
 'use strict'
-
+const handlebars = require('handlebars')
 const registerHeaderContentHelper = require('@kth/kth-node-web-common/lib/handlebars/helpers/headerContent')
 const { registerBreadcrumbHelper } = require('@kth/kth-node-web-common/lib/handlebars/helpers/breadcrumbs')
 const { registerLanguageLinkHelper } = require('@kth/kth-node-web-common/lib/handlebars/helpers/languageLink')
@@ -41,3 +41,5 @@ require('@kth/kth-node-web-common/lib/handlebars/helpers/contentedit')
 const i18n = require('../../../i18n')
 require('@kth/kth-node-web-common/lib/handlebars/helpers/createI18nHelper')(i18n)
 require('@kth/kth-node-web-common/lib/handlebars/helpers/safe')
+
+handlebars.registerHelper('eq', (var1, var2) => var1.toString() === var2.toString())

server/views/partials/headerLogotype.handlebars

@@ -1,6 +1,9 @@
 <a href="/student" class="kth-logotype">
   <figure>
-    <img class="blue" alt="Till KTH:s startsida" width="64" height="64" src="{{{proxyPrefix}}}/assets/logotype/logotype-blue.svg">
+    {{#if (eq theme "external")}}
     <img class="white" alt="Till KTH:s startsida" width="64" height="64" src="{{{proxyPrefix}}}/assets/logotype/logotype-white.svg">
+    {{else}}
+    <img class="blue" alt="Till KTH:s startsida" width="64" height="64" src="{{{proxyPrefix}}}/assets/logotype/logotype-blue.svg">
+    {{/if}}
   </figure>
 </a>