Keep forked chats focused in new tabs (#2038)

* fix(app): focus explicitly opened workspace tabs

Explicit tab navigation could be overwritten by attention-aware workspace
navigation when the visible agent had just finished. Make workspace navigation
own both normal attention selection and explicit targets so callers cannot
sequence them inconsistently.

* test(app): strengthen forked tab focus assertion

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

@@ -2,7 +2,7 @@ import { router, type Href } from "expo-router";
 import { useSessionStore } from "@/stores/session-store";
 import { getHostRuntimeStore, isHostRuntimeConnected } from "@/runtime/host-runtime";
 import { resolveNavigateToAgent, type NavigateToAgentInput } from "./resolve";
-import { navigateToPreparedWorkspaceTab } from "@/utils/workspace-navigation";
+import { navigateToWorkspace } from "@/stores/navigation-active-workspace-store";
 
 export type { NavigateToAgentInput } from "./resolve";
 
@@ -69,7 +69,7 @@ export function navigateToAgent(input: NavigateToAgentInput): string {
     navigateToHostAgent: (route) => {
       router.navigate(route as Href);
     },
-    navigateToPreparedWorkspaceTab,
+    navigateToWorkspace,
     restoreArchivedWorkspace: ({ serverId, agentId, workspaceId }) => {
       restoreArchivedWorkspace(serverId, agentId, workspaceId);
     },

packages/app/src/utils/navigate-to-agent/resolve.test.ts

@@ -4,7 +4,7 @@ import {
   type AgentNavTarget,
   type NavigateToAgentDeps,
 } from "@/utils/navigate-to-agent/resolve";
-import type { NavigateToPreparedWorkspaceTabInput } from "@/utils/prepare-workspace-tab";
+import type { NavigateToWorkspaceInput } from "@/stores/navigation-active-workspace-store";
 
 const SERVER_ID = "server-1";
 const WORKSPACE_ID = "workspace-1";
@@ -14,7 +14,7 @@ interface RecordedHostNav {
   route: string;
 }
 
-interface RecordedTabNav extends NavigateToPreparedWorkspaceTabInput {}
+interface RecordedTabNav extends NavigateToWorkspaceInput {}
 
 interface RecordedRestore {
   serverId: string;
@@ -40,7 +40,7 @@ function createFakeNavigators(target: AgentNavTarget): {
       navigateToHostAgent: (route) => {
         hostNavigations.push({ route });
       },
-      navigateToPreparedWorkspaceTab: (input) => {
+      navigateToWorkspace: (input) => {
         tabNavigations.push(input);
         return `/h/${input.serverId}/workspace/${input.workspaceId}`;
       },

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

@@ -1,6 +1,6 @@
 import { buildHostAgentDetailRoute } from "@/utils/host-routes";
 import { normalizeWorkspaceOpaqueId } from "@/utils/workspace-identity";
-import type { NavigateToPreparedWorkspaceTabInput } from "@/utils/prepare-workspace-tab";
+import type { NavigateToWorkspaceInput } from "@/stores/navigation-active-workspace-store";
 
 export interface NavigateToAgentInput {
   serverId: string;
@@ -18,7 +18,7 @@ export interface AgentNavTarget {
 export interface NavigateToAgentDeps {
   readAgentNavTarget: (input: { serverId: string; agentId: string }) => AgentNavTarget;
   navigateToHostAgent: (route: string) => void;
-  navigateToPreparedWorkspaceTab: (input: NavigateToPreparedWorkspaceTabInput) => string;
+  navigateToWorkspace: (input: NavigateToWorkspaceInput) => string;
   restoreArchivedWorkspace: (input: {
     serverId: string;
     agentId: string;
@@ -49,7 +49,7 @@ export function resolveNavigateToAgent(
     workspaceId,
   });
 
-  return deps.navigateToPreparedWorkspaceTab({
+  return deps.navigateToWorkspace({
     serverId: input.serverId,
     workspaceId,
     target: { kind: "agent", agentId: input.agentId },

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

@@ -9,8 +9,8 @@ vi.mock("expo-router", () => ({
   router: { navigate: vi.fn() },
 }));
 
-vi.mock("@/utils/workspace-navigation", () => ({
-  navigateToPreparedWorkspaceTab: vi.fn(() => ""),
+vi.mock("@/stores/navigation-active-workspace-store", () => ({
+  navigateToWorkspace: vi.fn(() => ""),
 }));
 
 vi.mock("@/runtime/host-runtime", () => ({