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/downloadRow.tsx

@@ -14,7 +14,7 @@ import {
   relativeTime,
 } from "../lib/format";
 import { navItemAttrs } from "../lib/listNav";
-import { failCopyKeys } from "../lib/downloadFailure";
+import { failCopyKeys, failTitleKey } from "../lib/downloadFailure";
 import { displayUrl, hasOwnTitle, jobTitle } from "./downloadTitle";
 import { IconButton } from "./ui/IconButton";
 import { Pressable } from "./ui/Pressable";
@@ -34,12 +34,14 @@ const STATUS_CLS: Record<string, string> = {
 };
 
 // Byte-progress phases (show a % bar) vs ffmpeg post-steps (no %, indeterminate pulse).
-// "editing" (the phase-2 editor) reports a real % from ffmpeg's out_time, so it gets a bar.
-const DOWNLOAD_PHASES = ["video", "audio", "editing"];
+// "editing" (the phase-2 editor) and "converting" (the phone-safe conversion of a download or an
+// upload) report a real % from ffmpeg's out_time, so they get a bar.
+const DOWNLOAD_PHASES = ["video", "audio", "editing", "converting"];
 const PHASE_KEYS = [
   "video",
   "audio",
   "editing",
+  "converting",
   "merging",
   "audio_extract",
   "thumbnail",
@@ -313,7 +315,7 @@ export function DownloadRow({
               <Pressable
                 onClick={() => onShowError?.(job)}
                 className="text-danger inline-block leading-6 min-h-6 touch-target pointer-coarse:leading-(--touch-target)"
-                title={t("downloads.errors.fail.title")}
+                title={t(failTitleKey(job))}
               >
                 · {t(failCopyKeys(job, "short"))}{" "}
                 <span className="text-muted underline">