settings: Hide upgrade links and storage stats for guests.

Avoids displaying the upgrade banner in upgrade_tip_widget.hbs and attachments stats banner in 'Uploaded files' UI when the user is logged in as a guest. This ensures that guest users do not see upgrade-related links that do not apply to them and cause 404 errors.

Fixes #20630.

web/src/attachments_ui.ts

@@ -13,7 +13,7 @@ import {$t, $t_html} from "./i18n.ts";
 import * as ListWidget from "./list_widget.ts";
 import * as loading from "./loading.ts";
 import * as scroll_util from "./scroll_util.ts";
-import {realm} from "./state_data.ts";
+import {current_user, realm} from "./state_data.ts";
 import * as timerender from "./timerender.ts";
 import * as ui_report from "./ui_report.ts";
 
@@ -68,6 +68,9 @@ function set_upload_space_stats(): void {
     if (realm.realm_upload_quota_mib === null) {
         return;
     }
+    if (current_user.is_guest) {
+        return;
+    }
     const args = {
         show_upgrade_message: realm.realm_plan_type === 2,
         upload_quota_string: $t(

web/templates/settings/upgrade_tip_widget.hbs

@@ -1,4 +1,5 @@
 <div>
+    {{#unless is_guest}}
         {{#unless zulip_plan_is_not_limited}}
         {{#if is_business_type_org}}
             <a href="/upgrade/" class="upgrade-tip" target="_blank" rel="noopener noreferrer">
@@ -14,4 +15,5 @@
             </div>
         {{/if}}
         {{/unless}}
+    {{/unless}}
 </div>