v1.6.0

## Features
- **Beta MCP support** - New `@page-agent/mcp` package lets MCP clients such as Claude Desktop and Copilot control the browser through the Page Agent extension
- **Better iframe handling** - Same-origin iframe elements are handled more reliably during DOM extraction and actions
- **Extension history workflows** - Users can rerun past tasks, export history sessions as JSON, and approve MCP-triggered tasks before execution

## What's Changed
* feat: optional AK by @gaomeng1900 in https://github.com/alibaba/page-agent/pull/311
* fix: add execCommand fallback for contenteditable input by @voidborne-d in https://github.com/alibaba/page-agent/pull/210
* fix(PageController): add `mouseleave` event by @gaomeng1900 in https://github.com/alibaba/page-agent/pull/319
* feat(ext): rerun tasks from history by @Adonis0123 in https://github.com/alibaba/page-agent/pull/314
* feat(extension): export history sessions as json by @Adonis0123 in https://github.com/alibaba/page-agent/pull/313
* chore(ext): rm keydown event on history by @gaomeng1900 in https://github.com/alibaba/page-agent/pull/321
* feat: option to disable named tool choice by @gaomeng1900 in https://github.com/alibaba/page-agent/pull/322
* fix(PageController): same-origin iframe actions by @gaomeng1900 in https://github.com/alibaba/page-agent/pull/325

## New Contributors
* @voidborne-d made their first contribution in https://github.com/alibaba/page-agent/pull/210
* @Adonis0123 made their first contribution in https://github.com/alibaba/page-agent/pull/314

**Full Changelog**: https://github.com/alibaba/page-agent/compare/v1.5.11...v1.6.0