Revert the timeline optimistic and pagination rework (#2596)

* Add npm release track invariant and beta dist-tag procedure

* Revert "Keep older chat history and image previews stable (#2490)"

The timeline optimistic/pagination rework needs more work than main releases can wait for. Reverted together with #2484; both are reapplied on integration/timeline-optimistic-rework.

* Revert "Stop completed turns from appearing stuck (#2484)"

See the #2490 revert. #2490 built on this submission-authority change, so the two revert and reapply as a pair.

packages/client/src/index.ts

@@ -478,9 +478,7 @@ function createAgentHandleFactory(daemonClient: DaemonClient): AgentHandleFactor
         latest = result?.agent ?? null;
         return result;
       },
-      send: async (text, options) => {
-        await daemonClient.sendAgentMessage(id, text, options);
-      },
+      send: (text, options) => daemonClient.sendAgentMessage(id, text, options),
       archive: async () => {
         const result = await daemonClient.archiveAgent(id);
         if (latest) {