fix(runner): space live identity below header

ui/src/components/task-chat/TaskChatRunnerTurn.test.tsx

@@ -51,6 +51,7 @@ describe("TaskChatRunnerTurn", () => {
     const identity = container.querySelector('[data-testid="task-chat-agent-identity"]');
     const activity = container.querySelector('[data-testid="task-chat-current-activity"]');
     expect(identity?.compareDocumentPosition(activity!)).toBe(Node.DOCUMENT_POSITION_FOLLOWING);
+    expect(container.querySelector('[data-testid="task-chat-runner-identity-row"]')?.classList.contains("pt-2")).toBe(true);
   });
 
   it("streams the final response in its durable slot and hides current activity", () => {

ui/src/components/task-chat/TaskChatRunnerTurn.tsx

@@ -96,7 +96,11 @@ export function TaskChatRunnerTurn({
         expanded={open}
         onToggle={() => setOpen((value) => !value)}
       />
-      {agentName ? <TaskChatAgentIdentity agentName={agentName} agentIcon={agentIcon} /> : null}
+      {agentName ? (
+        <div className="pt-2" data-testid="task-chat-runner-identity-row">
+          <TaskChatAgentIdentity agentName={agentName} agentIcon={agentIcon} />
+        </div>
+      ) : null}
       <div className="tc-turn-fold" data-folded={open ? "false" : "true"} aria-hidden={!open}>
         <div>
           <div className="flex flex-col gap-2 py-2">