fix: keep running turns expanded

apps/web/src/components/chat/MessagesTimeline.logic.test.ts

@@ -679,7 +679,7 @@ describe("deriveMessagesTimelineRows", () => {
     expect(finalRow?.kind === "message" && finalRow.showAssistantMeta).toBe(true);
   });
 
-  it("folds prior active-turn work while keeping the latest assistant message visible", () => {
+  it("does not fold the active in-progress turn", () => {
     const rows = deriveMessagesTimelineRows({
       timelineEntries: [
         {
@@ -735,19 +735,13 @@ describe("deriveMessagesTimelineRows", () => {
       revertTurnCountByUserMessageId: new Map(),
     });
 
+    expect(rows.some((row) => row.kind === "turn-fold")).toBe(false);
     expect(rows.map((row) => row.id)).toEqual([
-      "turn-fold:turn-1",
+      "assistant-thought-entry",
+      "work-entry-1",
       "assistant-latest-entry",
       "working-indicator-row",
     ]);
-    expect(rows.find((row) => row.kind === "turn-fold")).toEqual(
-      expect.objectContaining({
-        kind: "turn-fold",
-        turnId: "turn-1",
-        label: "Working",
-        expanded: false,
-      }),
-    );
   });
 
   it("only shows assistant metadata on the terminal assistant message", () => {

apps/web/src/components/chat/MessagesTimeline.logic.ts

@@ -236,6 +236,9 @@ function deriveTurnFolds(input: {
 
   const foldsByAnchorEntryId = new Map<string, TurnFold>();
   for (const [turnId, group] of groupsByTurnId) {
+    if (turnId === input.unsettledTurnId) {
+      continue;
+    }
     if (group.hasStreamingMessage) {
       continue;
     }
@@ -257,8 +260,6 @@ function deriveTurnFolds(input: {
 
     const isLatestInterruptedTurn =
       input.latestTurn?.turnId === turnId && input.latestTurn.state === "interrupted";
-    const isLatestRunningTurn =
-      input.latestTurn?.turnId === turnId && input.latestTurn.state === "running";
     // A turn cut short by a steer leaves trailing work entries behind its
     // terminal message — take whichever ended last.
     const lastEntryEnd =
@@ -276,15 +277,13 @@ function deriveTurnFolds(input: {
               lastEntryEnd,
           );
     const duration = elapsedMs !== null ? formatDuration(elapsedMs) : null;
-    const label = isLatestRunningTurn
-      ? "Working"
-      : isLatestInterruptedTurn
-        ? duration
-          ? `You stopped after ${duration}`
-          : "You stopped this response"
-        : duration
-          ? `Worked for ${duration}`
-          : "Worked";
+    const label = isLatestInterruptedTurn
+      ? duration
+        ? `You stopped after ${duration}`
+        : "You stopped this response"
+      : duration
+        ? `Worked for ${duration}`
+        : "Worked";
 
     foldsByAnchorEntryId.set(firstEntry.id, {
       turnId,