What's Changed
新功能
1.轻量版改由 C++ 构建，体积降低50%，启动更快、内存占用降低20%，
和Python版都是基于qt6，所以性能方面变化不大。
与完整版的区别在于包里面带不带PP-OCR的运行时和模型，轻量版也可以通过后续设置界面下载运行时和模型，所以推荐轻量版
2.水印新增菱形网格排布，角度和网格线可调（#100）。
3.PP-OCR 模型可以在「OCR设置」里下载、添加本地模型和删除；OCR 引擎合并成一个下拉框，选中的引擎或模型不可用时自动改用可用的那个。
使用PP-COR模型的时候，记得还得下载第一个运行时
4.每个动作的快捷键扩到 4 个，并且可以设成 Win 组合键和 PrtSc（#93）。
5.翻译新增火山引擎、腾讯云（#94，感谢 @RT622）和有道智云（#97）通道，火山和腾讯可开启本地额度保护。
6.剪贴板窗口的 ⚙ 菜单新增「清空历史」，只删除没有置顶、也不在分组里的内容（#26、#104）。
改进
画笔和荧光笔按住 Shift 画直线时可选吸附角度，笔迹更平滑，长笔迹不再越画越卡，单击可以画一个点。
设置窗口按所在屏幕决定默认大小，左侧导航可以滚动。
智能选区的切换动画默认开启，并且不再选中被系统隐藏的窗口。
OCR 识别失败时会说明原因。
释放内存改在后台线程进行，不再卡住界面。
修复
修复窗口标题栏和任务栏显示 Windows 默认图标的问题。
修复钉图菜单开着时按 Esc 会把钉图一起关掉的问题。
修复钉图缩略图每次还原时位置都偏移的问题。
修复钉图继承的标注撤销顺序不对、会先撤掉文字的问题。
修复剪贴板里的图片带文件路径时无法钉图的问题。
修复剪贴板监听刚启动就停止时程序卡死的问题。
修复剪贴板分组图标用组合表情时显示不全、切到隐藏分组后自定义图标丢失的问题。
修复剪贴板导入 CSV 时编码与 Excel 不一致导致乱码的问题。
修复 GIF 合成很快结束时导出卡住的问题。
修复三处界面文字缺少翻译的问题。
New
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The Lite edition is now built from C++ as a single exe that needs no extra runtime, starts faster and uses less memory; the one-click update replaces an old Lite install with the new one and keeps settings and clipboard history.
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Watermarks gain a diamond grid layout with adjustable angle and grid lines (#100).
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PP-OCR models can be downloaded, added from local files and deleted in OCR Settings; the OCR engines are merged into one drop-down, and if the chosen engine or model is unavailable an available one is used instead.
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Each action can have up to 4 shortcuts, and Win key combinations and PrtSc can be used as shortcuts (#93).
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Translation gains Volcengine, Tencent Cloud (#94, thanks @RT622) and Youdao AI Cloud (#97); Volcengine and Tencent can use a local quota guard.
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The ⚙ menu of the clipboard window gains "Clear History", which deletes only items that are neither pinned nor in a group (#26, #104).
Improvements
When holding Shift to draw a straight line with the Pen or Highlighter, the snap angle can be chosen; strokes are smoother, long strokes no longer slow down, and a single click draws a dot.
Clearing the clipboard history in Settings keeps pinned and grouped items by default; check "Also delete pinned and grouped content" to delete everything.
The Settings window sizes itself to the screen it opens on, and the navigation on the left can scroll.
The smart selection switch animation is on by default, and windows hidden by the system are no longer selected.
When OCR fails, the reason is shown.
Releasing memory now happens on a background thread and no longer freezes the UI.
Fixes
Fixed the title bar and taskbar showing the default Windows icon.
Fixed pressing Esc while a pin's menu was open also closing the pin.
Fixed a pin's thumbnail moving a little every time it was restored.
Fixed the undo order of annotations inherited by a pin, which undid text first.
Fixed clipboard images that carry a file path not being pinnable.
Fixed the app hanging when clipboard monitoring was stopped right after it started.
Fixed clipboard group icons made of combined emoji showing only partly, and custom icons being lost after switching to a hidden group.
Fixed garbled text when importing CSV into the clipboard because the encoding did not match Excel's.
Fixed GIF export hanging when compositing finished very quickly.
Fixed three UI texts missing translations.
Full Changelog: release-2.1.6...release-2.1.7