fix: Chats doesn't sync for multi client users

e2e/tests/chat/multi-client-chat-sync.spec.ts

@@ -0,0 +1,176 @@
+import { test, expect } from '../../fixtures/multi-client';
+import { RegisterPage } from '../../pages/register.page';
+import { ServerSearchPage } from '../../pages/server-search.page';
+import { ChatMessagesPage } from '../../pages/chat-messages.page';
+import {
+  MULTI_DEVICE_PASSWORD,
+  closeClient,
+  expectCrossDeviceMessage,
+  expectSyncedMessage,
+  expectSyncedMessageWithResync,
+  expectServerPeerVisible,
+  loginSecondDeviceIntoServer,
+  reopenClientInServer,
+  uniqueMultiDeviceName
+} from '../../helpers/multi-device-session';
+
+test.describe('Multi-client chat sync', () => {
+  test.describe.configure({ timeout: 360_000, retries: 1 });
+
+  test('syncs messages between same-user devices and late-joining users after offline gaps', async ({ createClient }) => {
+    const suffix = uniqueMultiDeviceName('multi-chat-sync');
+    const hostCredentials = {
+      username: `ludde_${suffix}`,
+      displayName: 'Ludde',
+      password: MULTI_DEVICE_PASSWORD
+    };
+    const guestCredentials = {
+      username: `azaaxin_${suffix}`,
+      displayName: 'Azaaxin',
+      password: MULTI_DEVICE_PASSWORD
+    };
+    const serverName = `Multi Client Chat Sync ${suffix}`;
+    const sharedBaselineMessage = `Shared baseline ${suffix}`;
+    const soloHostMessage = `Solo host message ${suffix}`;
+    const liveGuestProbeMessage = `Live guest probe ${suffix}`;
+    const offlineGapMessage = `Offline gap message ${suffix}`;
+    const client1 = await createClient();
+    const client2 = await createClient();
+    const client3 = await createClient();
+
+    await test.step('client 1: host registers and creates the shared server', async () => {
+      const registerPage = new RegisterPage(client1.page);
+
+      await registerPage.goto();
+      await registerPage.register(
+        hostCredentials.username,
+        hostCredentials.displayName,
+        hostCredentials.password
+      );
+
+      await expect(client1.page).toHaveURL(/\/dashboard/, { timeout: 15_000 });
+
+      const search = new ServerSearchPage(client1.page);
+
+      await search.createServer(serverName, {
+        description: 'Multi-client chat sync regression coverage'
+      });
+
+      await expect(client1.page).toHaveURL(/\/room\//, { timeout: 15_000 });
+    });
+
+    const messages1 = new ChatMessagesPage(client1.page);
+
+    await messages1.waitForReady();
+
+    await test.step('client 2: second host device joins the same server', async () => {
+      await loginSecondDeviceIntoServer(client2.page, hostCredentials, serverName);
+    });
+
+    const messages2 = new ChatMessagesPage(client2.page);
+
+    await messages2.waitForReady();
+
+    await test.step('both host devices exchange chat while online together', async () => {
+      await expectCrossDeviceMessage(messages1, messages2, sharedBaselineMessage);
+    });
+
+    await test.step('close the second host browser (client 2)', async () => {
+      await closeClient(client2);
+    });
+
+    await test.step('client 1 sends chat while the second host device is offline', async () => {
+      await client1.page.bringToFront();
+      await messages1.sendMessage(soloHostMessage);
+      await expect(messages1.getMessageItemByText(soloHostMessage)).toBeVisible({ timeout: 20_000 });
+    });
+
+    await test.step('guest account registers ahead of joining the server', async () => {
+      const registerPage = new RegisterPage(client3.page);
+
+      await registerPage.goto();
+      await registerPage.register(
+        guestCredentials.username,
+        guestCredentials.displayName,
+        guestCredentials.password
+      );
+
+      await expect(client3.page).toHaveURL(/\/dashboard/, { timeout: 15_000 });
+    });
+
+    let messages3 = new ChatMessagesPage(client3.page);
+
+    await test.step('client 3: guest joins and receives existing chat history', async () => {
+      // Keep the host tab active so its websocket + peer negotiation stay alive.
+      await client1.page.bringToFront();
+      await messages1.waitForReady();
+
+      const search = new ServerSearchPage(client3.page);
+
+      await search.joinServerFromSearch(serverName);
+      await expect(client3.page).toHaveURL(/\/room\//, { timeout: 20_000 });
+
+      messages3 = new ChatMessagesPage(client3.page);
+      await messages3.waitForReady();
+
+      // Presence gate: both users must see each other in the members panel
+      // before cross-user chat delivery can be expected.
+      await client1.page.bringToFront();
+      await expectServerPeerVisible(client1.page, guestCredentials.displayName);
+      await client3.page.bringToFront();
+      await expectServerPeerVisible(client3.page, hostCredentials.displayName);
+
+      // Live delivery first - proves host <-> guest transport is actually up.
+      await expectCrossDeviceMessage(messages1, messages3, liveGuestProbeMessage);
+
+      // History only replicates over P2P inventory once the peer link exists.
+      await client1.page.bringToFront();
+      await expectSyncedMessageWithResync(client3.page, messages3, sharedBaselineMessage);
+      await expectSyncedMessageWithResync(client3.page, messages3, soloHostMessage);
+    });
+
+    await test.step('close the guest browser (client 3)', async () => {
+      await closeClient(client3);
+    });
+
+    await test.step('reopen client 2 and send a message while client 1 stays online', async () => {
+      await client1.page.bringToFront();
+      const reopened = await reopenClientInServer(createClient, hostCredentials, serverName);
+
+      // Same-user catch-up uses account_sync, not P2P between own devices.
+      await expectSyncedMessageWithResync(
+        reopened.client.page,
+        reopened.messages,
+        soloHostMessage
+      );
+
+      await reopened.messages.sendMessage(offlineGapMessage);
+      await expect(reopened.messages.getMessageItemByText(offlineGapMessage)).toBeVisible({ timeout: 20_000 });
+    });
+
+    await test.step('reopened guest client receives the offline-gap message from host device 2', async () => {
+      await client1.page.bringToFront();
+      await messages1.waitForReady();
+
+      const reopenedGuest = await reopenClientInServer(createClient, guestCredentials, serverName);
+
+      // Presence gate before relying on cross-user delivery again.
+      await client1.page.bringToFront();
+      await expectServerPeerVisible(client1.page, guestCredentials.displayName);
+      await reopenedGuest.client.page.bringToFront();
+      await expectServerPeerVisible(reopenedGuest.client.page, hostCredentials.displayName);
+
+      await expectCrossDeviceMessage(messages1, reopenedGuest.messages, `Guest wake ${suffix}`);
+
+      await expectSyncedMessageWithResync(
+        reopenedGuest.client.page,
+        reopenedGuest.messages,
+        offlineGapMessage
+      );
+    });
+
+    await test.step('primary host device still receives the message from its second device', async () => {
+      await expectSyncedMessage(messages1, offlineGapMessage);
+    });
+  });
+});