fix(agent): 抽屉开着时路由变化,新对话的上下文跟着页面换

浏览器前进后退或会话里的链接换了页面,抽屉里新对话仍挂着上一页的对象。
按路由推断的上下文随页面更新;页面按钮带进来的上下文、正在看的会话不动。

Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Cxwgnn2pbzQ7rXv3rq7fei

apps/web/app/components/agent/agent-nav.test.ts

@@ -17,7 +17,19 @@ import {
   writeDraft,
 } from "./agent-nav.ts";
 import { CompactPager } from "./agent-session-list.tsx";
-import { agentReturnPath, isAgentPage, noteAgentReturnPath, outletKey, toggleAction } from "./agent-store.ts";
+import {
+  agentReturnPath,
+  clearAgentContext,
+  isAgentPage,
+  noteAgentReturnPath,
+  openAgentDrawer,
+  outletKey,
+  setAgentDrawerOpen,
+  showAgentRunInDrawer,
+  syncAgentContextToPath,
+  toggleAction,
+  useAgentDrawer,
+} from "./agent-store.ts";
 import { cachedRunEvents, cacheRunEvents } from "./use-agent-stream.ts";
 
 // 智能体页面切换的状态逻辑:整页重挂载 key、分栏与 URL、草稿、滚动策略、快捷键在智能体页面的行为。
@@ -176,3 +188,33 @@ describe("会话页「在侧边打开」回到之前的页面", () => {
     expect(agentReturnPath()).toBe("/console/sites");
   });
 });
+
+describe("抽屉开着时路由变化", () => {
+  // useAgentDrawer 是 useSyncExternalStore,测试里直接读快照
+  const snapshot = () => {
+    let out: ReturnType<typeof useAgentDrawer> | null = null;
+    const Probe = () => {
+      out = useAgentDrawer();
+      return null;
+    };
+    renderToStaticMarkup(createElement(Probe));
+    return out as unknown as ReturnType<typeof useAgentDrawer>;
+  };
+  it("新对话的路由上下文跟着页面换", () => {
+    openAgentDrawer({ label: "作品 aaaa", entityId: "aaaa", fromPath: true });
+    syncAgentContextToPath("/console/sites/hdh");
+    expect(snapshot().context).toMatchObject({ siteId: "hdh", fromPath: true });
+    syncAgentContextToPath("/console/home");
+    expect(snapshot().context).toBeNull();
+  });
+  it("页面按钮带的上下文、正在看的会话、抽屉关着时不动", () => {
+    openAgentDrawer({ label: "作品：沙丘", entityId: "e1" });
+    syncAgentContextToPath("/console/sites/hdh");
+    expect(snapshot().context).toMatchObject({ entityId: "e1" });
+    clearAgentContext();
+    showAgentRunInDrawer("r1");
+    syncAgentContextToPath("/console/sites/hdh");
+    expect(snapshot().context).toBeNull();
+    setAgentDrawerOpen(false);
+  });
+});