🐛 Fix nodejs incompatibility with common tests prepend script (#5730)

* 🐛 Fix nodejs incompatibility with common tests prepend script

* 📎 Fix linter issues

Related to the upcoming update of clj-kondo

frontend/shadow-cljs.edn

@@ -147,7 +147,7 @@
 
    :modules
    {:test {:init-fn frontend-tests.runner/init
-           :prepend-js "globalThis.navigator = {userAgent: \"\"}"}}}
+           :prepend-js ";if (typeof globalThis.navigator?.userAgent === 'undefined') { globalThis.navigator = {userAgent: ''}; };"}}}
 
   :lib-penpot
   {:target :esm

frontend/src/app/worker/import.cljs

@@ -72,7 +72,7 @@
   ([context type id media]
    (let [file-id (:file-id context)
          path (case type
-                :manifest           (str "manifest.json")
+                :manifest           "manifest.json"
                 :page               (str file-id "/" id ".svg")
                 :colors-list        (str file-id "/colors.json")
                 :colors             (let [ext (cm/mtype->extension (:mtype media))]