fix: revert showProgress and dead code cleanups per code review

Restore showProgress signature and return/e dead code to keep
the diff minimal per cpsievert's feedback.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

inst/www/shared/shiny.js

@@ -3023,8 +3023,10 @@
     }
     // Progress shouldn't be shown on the download button
     // (progress will be shown as a page level pulse instead)
-    showProgress() {
+    showProgress(el, show3) {
       return;
+      el;
+      show3;
     }
   };
   (0, import_jquery25.default)(document).on(
@@ -3040,6 +3042,8 @@
       evt.name = el.id;
       evt.href = el.href;
       (0, import_jquery25.default)(document).trigger(evt);
+      return;
+      e4;
     }
   );
 

srcts/src/bindings/output/downloadlink.ts

@@ -22,8 +22,10 @@ class DownloadLinkOutputBinding extends OutputBinding {
   }
   // Progress shouldn't be shown on the download button
   // (progress will be shown as a page level pulse instead)
-  showProgress(): void {
+  showProgress(el: HTMLElement, show: boolean): void {
     return;
+    el; // eslint-disable-line @typescript-eslint/no-unused-expressions
+    show; // eslint-disable-line @typescript-eslint/no-unused-expressions
   }
 }
 
@@ -51,6 +53,9 @@ $(document).on(
     evt.name = el.id;
     evt.href = el.href;
     $(document).trigger(evt);
+
+    return;
+    e; // eslint-disable-line @typescript-eslint/no-unused-expressions
   },
 );