v1.2.6

修复：Windows 透明窗口在拖动/切换焦点/跨屏缩放后偶发“顶部白条/残影”（便签窗口也覆盖）
改进：便签模式实时自动保存（防抖 + 串行写入），失焦/切回阅读前强制落盘，降低丢改动概率
改进：便签模式隐藏右下角通知/宽度气泡，减少打扰；便签提示气泡支持自动换行避免溢出
更新：内置插件「PDF及图片高精度解析（pdf2doc）」v0.2.8（分割阈值提升到 500 页；分割提示与默认自动合并策略优化）

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Fixed: On Windows, transparent windows could occasionally show a top “white bar/ghosting” after dragging / focus changes / display-scale changes (also covers Sticky Note window)
Improved: Sticky Note mode now autosaves on every change (debounced + serialized writes); forces a flush on blur and before switching back to preview, reducing the chance of losing edits
Improved: Sticky Note mode hides bottom-right notifications/width bubble to reduce distractions; Sticky Note tooltips now wrap to avoid overflow
Updated: Built-in “PDF & Image High-Precision Parsing (pdf2doc)” v0.2.8 (split threshold raised to 500 pages; refined split guidance and default auto-merge behavior)