fix(channels): the Length column shows the sum alone

The "+N without length" line did not fit the 4.5 rem column (88 px of
text in a 56 px cell) and spilled into Tags. The owner wants no such
line there: the cell shows the summed hours, and the channel list no
longer sends a count nothing reads. A playlist's total keeps it.

frontend/src/lib/api/channels.ts

@@ -76,9 +76,8 @@ export interface ManagedChannel {
   /** When the follow reached this list: the subscription import that first saw it, or a
    *  subscribe made here. */
   added_at: string;
+  /** The lengths it knows; a video with none (a live one, a 24/7 archive) is left out. */
   total_duration_seconds: number;
-  /** Live videos the total cannot hold (no length): the "+N without length" beside it. */
-  live_without_length: number;
   priority: number;
   hidden: boolean;
   deep_requested: boolean;

frontend/src/modules/channels/channelColumns.dom.test.tsx

@@ -28,7 +28,6 @@ const ch = (over: Partial<ManagedChannel>): ManagedChannel => ({
   last_video_at: null,
   added_at: "2026-06-10T08:00:00+00:00",
   total_duration_seconds: 0,
-  live_without_length: 0,
   priority: 0,
   hidden: false,
   deep_requested: false,
@@ -186,6 +185,19 @@ describe("buildChannelColumns — Added", () => {
     render(<>{added!.render(ch({ added_at: "2026-10-12T08:00:00+00:00" }))}</>);
     expect(screen.getByText(formatDate("2026-10-12T08:00:00+00:00", "en"))).toBeTruthy();
   });
+
+  // The column is sized for the sum: a count of videos without a length beside it spilled into
+  // Tags, so the table shows the sum alone — even from a server that still sends the count.
+  it("Length shows the sum alone", () => {
+    const length = cols.find((c) => c.key === "length");
+    const row = {
+      ...ch({ total_duration_seconds: 7200 }),
+      live_without_length: 2,
+    } as ManagedChannel;
+    const { container } = render(<>{length!.render(row)}</>);
+    expect(container.textContent).not.toContain("card.liveWithoutLength");
+    expect(container.querySelectorAll("span")).toHaveLength(1);
+  });
 });
 
 describe("tagFilterChips", () => {

frontend/src/modules/channels/channelColumns.tsx

@@ -11,7 +11,6 @@ import { ChannelTagsControl, type SuggestedTag } from "../../features/channel/Ch
 import { StoredCell } from "./channelCells";
 import { isFullySynced } from "./channelSync";
 import { RelativeTime } from "../../components/ui/RelativeTime";
-import { withLiveCount } from "../../features/video/liveWithoutLength";
 import type { FilterChip } from "./TagFilterChips";
 
 /** The shared "subscribers" DataTable column (right-aligned, sortable, em-dash for null) — identical
@@ -236,11 +235,9 @@ export function buildChannelColumns(deps: ChannelColumnDeps): Column<ManagedChan
       sortValue: (c) => c.total_duration_seconds,
       render: (c) => (
         <span className="text-muted tabular-nums">
+          {/* The sum alone: the column is sized for it, and a count of the videos it left out
+              (no length) did not fit beside it. */}
           {formatTotalHours(c.total_duration_seconds, lang)}
-          {/* Its own line: the column is sized for the sum alone. */}
-          {c.live_without_length > 0 && (
-            <span className="block text-2xs">{withLiveCount("", c.live_without_length, t)}</span>
-          )}
         </span>
       ),
     },

frontend/src/modules/channels/useChannelActions.dom.test.tsx

@@ -61,7 +61,6 @@ const ch = (over: Partial<ManagedChannel> = {}): ManagedChannel => ({
   last_video_at: null,
   added_at: "2026-06-10T08:00:00+00:00",
   total_duration_seconds: 0,
-  live_without_length: 0,
   priority: 0,
   hidden: false,
   deep_requested: false,