feat(app): give composer track pills a segment per state

A mixed fan-out used to collapse the pill to its single most urgent
state, so a red dot beside "1 failed" over a child that was still
working read as the whole fan-out having stopped. Every state present
now gets its own mark and count, in the sidebar's status-group order.

packages/app/src/composer/task-list/index.tsx

@@ -24,11 +24,12 @@ const TaskListCard = memo(function TaskListCard({ tasks }: { tasks: TodoEntry[]
   // Counts only. The active task used to ride along in the header, where it was the first thing
   // truncated on a phone; the panel shows it in full, in place, with the rest of the list.
   const label = t("message.todo.tasksProgress", { completed, total: tasks.length });
+  const segments = useMemo(() => [{ bucket: null, text: label }], [label]);
 
   return (
     <ComposerTrackPill
       testID="agent-task-list-header"
-      label={label}
+      segments={segments}
       panelTitle={t("message.todo.title")}
     >
       {tasks.map((task, index) => (