fix(browser): recover stale remote target ids

Co-authored-by: Ilya Strelov <10761735+strelov1@users.noreply.github.com>

src/browser/server-context.remote-tab-ops.test.ts

@@ -153,6 +153,55 @@ describe("browser server-context remote profile tab operations", () => {
     expect(second.targetId).toBe("A");
   });
 
+  it("falls back to the only tab for remote profiles when targetId is stale", async () => {
+    const responses = [
+      [{ targetId: "T1", title: "Tab 1", url: "https://example.com", type: "page" }],
+      [{ targetId: "T1", title: "Tab 1", url: "https://example.com", type: "page" }],
+    ];
+    const listPagesViaPlaywright = vi.fn(async () => {
+      const next = responses.shift();
+      if (!next) {
+        throw new Error("no more responses");
+      }
+      return next;
+    });
+
+    vi.spyOn(pwAiModule, "getPwAiModule").mockResolvedValue({
+      listPagesViaPlaywright,
+    } as unknown as Awaited<ReturnType<typeof pwAiModule.getPwAiModule>>);
+
+    const { remote } = createRemoteRouteHarness();
+    const chosen = await remote.ensureTabAvailable("STALE_TARGET");
+    expect(chosen.targetId).toBe("T1");
+  });
+
+  it("keeps rejecting stale targetId for remote profiles when multiple tabs exist", async () => {
+    const responses = [
+      [
+        { targetId: "A", title: "A", url: "https://a.example", type: "page" },
+        { targetId: "B", title: "B", url: "https://b.example", type: "page" },
+      ],
+      [
+        { targetId: "A", title: "A", url: "https://a.example", type: "page" },
+        { targetId: "B", title: "B", url: "https://b.example", type: "page" },
+      ],
+    ];
+    const listPagesViaPlaywright = vi.fn(async () => {
+      const next = responses.shift();
+      if (!next) {
+        throw new Error("no more responses");
+      }
+      return next;
+    });
+
+    vi.spyOn(pwAiModule, "getPwAiModule").mockResolvedValue({
+      listPagesViaPlaywright,
+    } as unknown as Awaited<ReturnType<typeof pwAiModule.getPwAiModule>>);
+
+    const { remote } = createRemoteRouteHarness();
+    await expect(remote.ensureTabAvailable("STALE_TARGET")).rejects.toThrow(/tab not found/i);
+  });
+
   it("uses Playwright focus for remote profiles when available", async () => {
     const listPagesViaPlaywright = vi.fn(async () => [
       { targetId: "T1", title: "Tab 1", url: "https://example.com", type: "page" },