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.menu.dom.test.tsx

@@ -364,3 +364,19 @@ describe("a download-lifecycle notice", () => {
     expect(screen.queryByText("download")).toBeNull();
   });
 });
+
+describe("NotificationsPanel · a finished job's title", () => {
+  it("names what finished: a download, a clip, an upload", () => {
+    h.server = [
+      server(1),
+      server(2, { data: { title: "Ready 2", kind: "edit" } }),
+      server(3, { data: { title: "Ready 3", kind: "upload" } }),
+    ];
+    h.client = [];
+    mount();
+    const titleOf = (text: string) => rowOf(text).textContent ?? "";
+    expect(titleOf("Ready 1")).toContain("inbox.downloadDone.title");
+    expect(titleOf("Ready 2")).toContain("inbox.editDone.title");
+    expect(titleOf("Ready 3")).toContain("inbox.uploadDone.title");
+  });
+});