fix(review): address second CodeRabbit pass

- streamystats: derive toggle enablement from the same effective URL the
  input renders (locked admin URL no longer disables every switch)
- FilterSheet: use the deep-equality rule for toggling that rendering
  already uses — option objects are recreated across renders
- DownloadCard: take t from useTranslation so badge labels re-render on
  language change
- fileOperations: count trickplay bytes in the storage total, matching
  the per-item size model
- PendingAccountSaveModal: warn instead of silently swallowing a failed
  account save

providers/Downloads/fileOperations.ts

@@ -97,6 +97,9 @@ export function getDownloadedItemSize(id: string): number {
 export function calculateTotalDownloadedSize(): number {
   const items = getAllDownloadedItems();
   return items.reduce((sum, item) => {
+    // Trickplay bytes count too — getDownloadedItemSize models per-item size
+    // as video + trickplay, the total must match.
+    const trickplaySize = item.trickPlayData?.size ?? 0;
     // Read the live file size on disk so the total reflects actual usage and
     // self-heals items whose stored videoFileSize is 0 (old schema, or
     // `fileInfo.size` was undefined at download time). Fall back to the stored
@@ -105,12 +108,12 @@ export function calculateTotalDownloadedSize(): number {
       try {
         const file = new File(filePathToUri(item.videoFilePath));
         if (file.exists) {
-          return sum + (file.size ?? item.videoFileSize ?? 0);
+          return sum + (file.size ?? item.videoFileSize ?? 0) + trickplaySize;
         }
       } catch (error) {
         console.warn("Failed to stat downloaded file for size:", error);
       }
     }
-    return sum + (item.videoFileSize ?? 0);
+    return sum + (item.videoFileSize ?? 0) + trickplaySize;
   }, 0);
 }