fix(ui): preserve owner filters across gateway reconnects (#127676)

Co-authored-by: RoboClaw <309084314+roboclaw-bot@users.noreply.github.com>
Co-authored-by: Tak Hoffman <781889+Takhoffman@users.noreply.github.com>

ui/src/e2e/session-ownership.e2e.test.ts

@@ -183,6 +183,23 @@ suite.define(() => {
         ),
       )
       .toBe(true);
+
+    const initialConnections = (await gateway.getRequests("connect")).length;
+    await gateway.closeLatest(1012, "owner filter reconnect proof");
+    await expect
+      .poll(async () => (await gateway.getRequests("connect")).length)
+      .toBeGreaterThan(initialConnections);
+    await expect
+      .poll(async () => (await gateway.getRequests("sessions.list")).at(-1)?.params)
+      .toMatchObject({ ownerId: "profile-ada" });
+    await expect
+      .poll(() => currentPage.locator('[data-session-key="agent:main:bob"]').count())
+      .toBe(0);
+    const reconnectedMenu = await openSidebarSortMenu(currentPage);
+    await expectBrowser(reconnectedMenu.locator('[value="owner:profile-ada"]')).toHaveAttribute(
+      "aria-checked",
+      "true",
+    );
   });
 
   it("renders zero ownership chrome for a single owner", async () => {

ui/src/lib/sessions/index.ts

@@ -387,6 +387,7 @@ export function createSessionCapability(gateway: SessionGateway): SessionCapabil
             ? scopedAgentListParamsForSession(gateway.snapshot, sessionKey)
             : { agentId: resolveUiSelectedGlobalAgentId(gateway.snapshot) };
           await roster.refresh({
+            ...roster.lastOptions(), // Keep visible roster filters through reconnect hydration.
             ...agentScope,
             includeDerivedTitles: true,
             includeLastMessage: true,