fix(web): collapse agent commentary

web/src/structured.test.ts

@@ -468,18 +468,40 @@ describe("structured connection: data flow", () => {
       },
     });
     ws.emit({ type: "reduced_state", state: respondingState });
-    // While the turn is active, the last intermediate text (agent:2) stays
-    // outside the collapsed group so it's visible as current narration.
-    expect(conn.el.querySelector('[data-row-id="agent:2"]')?.closest(".st-tool-group")).toBeNull();
-    // Earlier intermediate text (agent:1) is still inside the group.
+    // Intermediate updates stay inside the collapsed activity disclosure,
+    // rather than becoming a second visible transcript alongside its summary.
+    expect(conn.el.querySelector('[data-row-id="agent:2"]')?.closest(".st-tool-group")).not.toBeNull();
     expect(conn.el.querySelector('[data-row-id="agent:1"]')?.closest(".st-tool-group")).not.toBeNull();
-    // When the turn ends, all intermediate text is absorbed.
+    // It remains collapsed when the turn ends.
     ws.emit({ type: "reduced_state", state: idleState });
     expect(conn.el.querySelector('[data-row-id="agent:2"]')?.closest(".st-tool-group")).not.toBeNull();
     expect(conn.el.querySelector('[data-row-id="agent:1"]')?.closest(".st-tool-group")).not.toBeNull();
     conn.dispose();
   });
 
+  it("collapses trailing thought commentary with a turn's tool activity", () => {
+    const ws = new FakeSocket();
+    const conn = mount({ sockets: [ws] });
+    ws.open();
+    ws.emit({
+      type: "transcript_snapshot",
+      snapshot: {
+        cursor: 5,
+        rows: [
+          row("user:1", "user", { content: { type: "text", text: "do it" } }),
+          toolRow("tool:1", "one"),
+          toolRow("tool:2", "two"),
+          row("thought:1", "agent_thought", { content: { type: "text", text: "Checking the next step" } }),
+          row("thought:2", "agent_thought", { content: { type: "text", text: "Preparing the change" } }),
+        ],
+      },
+    });
+    for (const id of ["thought:1", "thought:2"]) {
+      expect(conn.el.querySelector(`[data-row-id="${id}"]`)?.closest(".st-tool-group")).not.toBeNull();
+    }
+    conn.dispose();
+  });
+
   it("keeps an expanded running tool open without emitting a click when patched", () => {
     const ws = new FakeSocket();
     const conn = mount({ sockets: [ws] });