fix(downloads): an upload's cancel, progress, failure and notice speak of an upload

- Cancelling an upload asks "Delete upload?" and says the uploaded file is
  removed from the server with it.
- The phone-safe conversion's real ffmpeg % shows as a bar ("Converting for
  phones"), not an indeterminate pulse.
- A failed upload is titled "The upload isn't ready", with its own reasons
  (convert_failed, retryable; upload_missing) instead of download copy.
- The inbox says "Upload ready to share" for a converted upload.

frontend/src/components/NotificationsPanel.tsx

@@ -446,6 +446,11 @@ const DOWNLOAD_LIFECYCLE: Record<string, string | undefined> = {
   download_expired: "downloadExpired",
   download_evicted: "downloadEvicted",
 };
+// A `download_done` notice's title by the producer's `kind`; any other kind reads as a download.
+const DONE_TITLE: Record<string, string | undefined> = {
+  edit: "inbox.editDone.title",
+  upload: "inbox.uploadDone.title",
+};
 
 function serverKind(n: AppNotification): "scheduler" | "download" | null {
   if (n.type === "scheduler" && typeof n.data?.job_id === "string") return "scheduler";
@@ -552,10 +557,11 @@ function NotificationRow({
     title = t(`inbox.${lifecycle}.title`, { from: d.from ?? "" });
     body = d.title || null;
   } else if (isDownloadDone) {
-    // "Download ready" / "Edit ready" per the producer's kind, with the video's title as the body
-    // (shipped in data.title). Same notification type; the copy differs so an edit isn't mislabelled.
+    // "Download ready" / "Edit ready" / "Upload ready" per the producer's kind, with the video's title
+    // as the body (shipped in data.title). Same notification type; the copy differs so an edit or an
+    // upload isn't called a download.
     const d = n.data as { title?: string | null; kind?: string };
-    title = t(d.kind === "edit" ? "inbox.editDone.title" : "inbox.downloadDone.title");
+    title = t(DONE_TITLE[d.kind ?? ""] ?? "inbox.downloadDone.title");
     body = d.title || n.body;
   }
   return (