fix(app): ignore stale History archive state for active agents

A cached History row can outlive a successful reopen. When the workspace exists, live session state now wins so an active agent is not interrupted by another refresh.

packages/app/src/utils/navigate-to-agent/index.ts

@@ -87,7 +87,9 @@ function restoreArchivedWorkspace(target: HistoryWorkspaceRestore): void {
   // must restore even when its agent survived unarchived; an archived agent must
   // still reopen when its workspace survived.
   if (session.workspaces.has(workspaceId)) {
-    if (agentArchived) {
+    const liveAgent = session.agents.get(agentId) ?? session.agentDetails.get(agentId);
+    const shouldReopenAgent = agentArchived && (!liveAgent || Boolean(liveAgent.archivedAt));
+    if (shouldReopenAgent) {
       client.refreshAgent(agentId).catch((error) => {
         console.error("[HistoryRestore] Failed to reopen archived agent", {
           serverId,

packages/app/src/utils/navigate-to-agent/restore-archived-workspace.test.ts

@@ -297,6 +297,22 @@ describe("restoreArchivedWorkspace via navigateToAgent", () => {
     expect(status()).toBeNull();
   });
 
+  it("does not reopen an active agent from a stale archived History row", () => {
+    const store = useSessionStore.getState();
+    store.setAgents(SERVER_ID, (prev) => {
+      const next = new Map(prev);
+      next.set(AGENT_ID, agent(null));
+      return next;
+    });
+    store.mergeWorkspaces(SERVER_ID, [workspace()]);
+    refreshAgent.mockImplementation(() => new Promise(() => {}));
+
+    openFromHistory();
+
+    expect(refreshAgent).not.toHaveBeenCalled();
+    expect(status()).toBeNull();
+  });
+
   it("is a no-op when a non-archived workspace descriptor is already present", () => {
     const store = useSessionStore.getState();
     store.setAgents(SERVER_ID, (prev) => {