feat: use browser download manager for single file downloads (#17507)

* Fix download panel reactivity

* Directly download individual files without buffering in memory

* Fix shared link e2e download tests

web/src/lib/stores/download.ts

@@ -29,6 +29,7 @@ const update = (key: string, value: Partial<DownloadProgress> | null) => {
     const item = newState[key];
     Object.assign(item, value);
     item.percentage = Math.min(Math.floor((item.progress / item.total) * 100), 100);
+    newState[key] = { ...item };
 
     return newState;
   });