运行时元素操作跟随前台标签页\n\n- 点搜索/按钮常开新标签页, 此前运行时元素操作仍附着旧标签页,\n 导致新页上的拾取选择器找不到元素、相似元素列表抓到空\n- evaluate 入口增加前台标签页检查(400ms 节流), 变化时 activateTab 切换附着

src/main/browser/session.ts

@@ -192,7 +192,22 @@ export class BrowserSession implements BrowserLike {
     return this.transport.send<T>(method, params);
   }
 
+  private lastFollowCheck = 0;
+
+  /** 运行时跟随前台标签页：点按钮/搜索常开新标签页，元素操作应落在用户眼前看到的页面（节流 400ms） */
+  private async followForegroundTab(): Promise<void> {
+    if (this.win || !this.httpBase) return;
+    const now = Date.now();
+    if (now - this.lastFollowCheck < 400) return;
+    this.lastFollowCheck = now;
+    const pages = await listPageTargets(this.httpBase).catch(() => []);
+    const page = pages[0];
+    if (!page || page.id === this.activeTargetId) return;
+    await this.activateTab(page.id);
+  }
+
   private async evaluate<T = unknown>(expression: string): Promise<T> {
+    await this.followForegroundTab().catch(() => {});
     const result = await this.cdp<{ result?: { value?: T }; exceptionDetails?: { exception?: { description?: string }; text?: string } }>(
       "Runtime.evaluate",
       { expression, returnByValue: true, awaitPromise: true }