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/app/src/stores/draft-store/index.ts

@@ -8,7 +8,6 @@ import {
   persistAttachmentFromDataUrl,
   persistAttachmentFromFileUri,
 } from "@/attachments/service";
-import { collectRetainedAttachmentIds } from "@/attachments/gc-retention";
 import { useCreateFlowStore } from "@/stores/create-flow-store";
 import { useSessionStore, type SessionState } from "@/stores/session-store";
 import { useWorkspaceAttachmentsStore } from "@/attachments/workspace-attachments-store";
@@ -139,9 +138,6 @@ async function runAttachmentGc(): Promise<void> {
   for (const id of useDraftStore.getState().collectActiveAttachmentIds()) {
     referencedIds.add(id);
   }
-  for (const id of collectRetainedAttachmentIds()) {
-    referencedIds.add(id);
-  }
 
   const pendingByDraftId = useCreateFlowStore.getState().pendingByDraftId;
   for (const pendingCreate of Object.values(pendingByDraftId)) {