feat(vscode-ide-companion): cherry-pick ACP compatibility improvements from PR #2195

- Add extractSessionListItems() utility for robust ACP response parsing
- Refactor getSessionList() and getSessionListPaged() to use the new utility
- Add openNewChatTabCommand to create new session when opening chat tab
- Add comprehensive test coverage for session list extraction

Co-authored-by: ZZAoYe <zzbuaoye@gmail.com>

packages/vscode-ide-companion/src/services/qwenAgentManager.test.ts

@@ -0,0 +1,98 @@
+/**
+ * @license
+ * Copyright 2025 Qwen Team
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { describe, expect, it, vi } from 'vitest';
+import {
+  extractSessionListItems,
+  QwenAgentManager,
+} from './qwenAgentManager.js';
+
+vi.mock('vscode', () => ({
+  window: {
+    showInformationMessage: vi.fn(),
+    showWarningMessage: vi.fn(),
+    showErrorMessage: vi.fn(),
+  },
+}));
+
+describe('extractSessionListItems', () => {
+  it('reads ACP session arrays from the sessions field', () => {
+    const items = extractSessionListItems({
+      sessions: [{ sessionId: 'session-1' }],
+    });
+
+    expect(items).toEqual([{ sessionId: 'session-1' }]);
+  });
+
+  it('reads ACP session arrays from the legacy items field', () => {
+    const items = extractSessionListItems({
+      items: [{ sessionId: 'session-2' }],
+    });
+
+    expect(items).toEqual([{ sessionId: 'session-2' }]);
+  });
+
+  it('returns empty array for invalid responses', () => {
+    expect(extractSessionListItems(null)).toEqual([]);
+    expect(extractSessionListItems(undefined)).toEqual([]);
+    expect(extractSessionListItems('string')).toEqual([]);
+    expect(extractSessionListItems({})).toEqual([]);
+    expect(extractSessionListItems({ sessions: 'not-array' })).toEqual([]);
+  });
+
+  it('prefers sessions over items when both exist', () => {
+    const items = extractSessionListItems({
+      sessions: [{ sessionId: 'from-sessions' }],
+      items: [{ sessionId: 'from-items' }],
+    });
+
+    expect(items).toEqual([{ sessionId: 'from-sessions' }]);
+  });
+});
+
+describe('QwenAgentManager session list compatibility', () => {
+  it('maps paged ACP session lists returned via items', async () => {
+    const manager = new QwenAgentManager();
+    const listSessions = vi.fn().mockResolvedValue({
+      items: [
+        {
+          sessionId: 'session-3',
+          prompt: 'Fix sidebar history',
+          mtime: 1772114825468.5825,
+          cwd: '/workspace/qwen-code',
+        },
+      ],
+    });
+
+    (
+      manager as unknown as {
+        connection: { listSessions: typeof listSessions };
+      }
+    ).connection = { listSessions };
+
+    const page = await manager.getSessionListPaged({ size: 20 });
+
+    expect(listSessions).toHaveBeenCalledWith({ size: 20 });
+    expect(page).toEqual({
+      sessions: [
+        {
+          id: 'session-3',
+          sessionId: 'session-3',
+          title: 'Fix sidebar history',
+          name: 'Fix sidebar history',
+          startTime: undefined,
+          lastUpdated: 1772114825468.5825,
+          messageCount: 0,
+          projectHash: undefined,
+          filePath: undefined,
+          cwd: '/workspace/qwen-code',
+        },
+      ],
+      nextCursor: undefined,
+      hasMore: false,
+    });
+  });
+});