HH-530: replace user-facing Chatwoot branding with GoChat (#117)

* fix(HH-530): replace user-facing Chatwoot branding

* fix(HH-530): close branding review blockers

* test(HH-530): cover update banner binding

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Co-authored-by: Rogee <rogee@ipao.vip>

frontend/app/javascript/shared/components/Branding.vue

@@ -33,7 +33,10 @@ export default {
     brandRedirectURL() {
       try {
         const referrerHost = this.$store.getters['appConfig/getReferrerHost'];
-        const url = new URL(this.globalConfig.widgetBrandURL);
+        const url = new URL(
+          this.globalConfig.widgetBrandURL,
+          window.location.origin
+        );
         if (referrerHost) {
           url.searchParams.set('utm_source', referrerHost);
           url.searchParams.set('utm_medium', 'widget');