feat(vscode-ide-companion): 优化 Qwen Code 聊天窗口创建逻辑

- 修改 createPanel 方法返回值类型，使其支持异步操作
- 实现聚焦当前激活编辑器的功能
- 优化多窗口创建逻辑，允许在已有 Qwen Code 窗口旁边创建新窗口
- 移除自动锁定编辑器组的功能，以支持多个 Qwen Code 标签页
- 在 UI 中添加聚焦当前文件的按钮

packages/vscode-ide-companion/src/webview/App.tsx

@@ -1048,12 +1048,33 @@ export const App: React.FC = () => {
                 <span>{getEditModeInfo().text}</span>
               </button>
               {activeFileName && (
-                <span
-                  className="active-file-indicator"
+                <button
+                  type="button"
+                  className="action-button active-file-indicator"
                   title={`Showing Qwen Code your current file selection: ${activeFileName}`}
+                  onClick={() => {
+                    // Request to focus/reveal the active file
+                    vscode.postMessage({
+                      type: 'focusActiveEditor',
+                      data: {},
+                    });
+                  }}
                 >
-                  {activeFileName}
-                </span>
+                  <svg
+                    xmlns="http://www.w3.org/2000/svg"
+                    viewBox="0 0 20 20"
+                    fill="currentColor"
+                    aria-hidden="true"
+                    data-slot="icon"
+                  >
+                    <path
+                      fillRule="evenodd"
+                      d="M6.28 5.22a.75.75 0 0 1 0 1.06L2.56 10l3.72 3.72a.75.75 0 0 1-1.06 1.06L.97 10.53a.75.75 0 0 1 0-1.06l4.25-4.25a.75.75 0 0 1 1.06 0Zm7.44 0a.75.75 0 0 1 1.06 0l4.25 4.25a.75.75 0 0 1 0 1.06l-4.25 4.25a.75.75 0 0 1-1.06-1.06L17.44 10l-3.72-3.72a.75.75 0 0 1 0-1.06ZM11.377 2.011a.75.75 0 0 1 .612.867l-2.5 14.5a.75.75 0 0 1-1.478-.255l2.5-14.5a.75.75 0 0 1 .866-.612Z"
+                      clipRule="evenodd"
+                    ></path>
+                  </svg>
+                  <span>{activeFileName}</span>
+                </button>
               )}
               <div className="action-divider"></div>
               <button