The Linux full suite sampled a window-control color during its transition. Wait for CSS transitions to finish while retaining exact style, contrast, geometry, and native interaction assertions.
Include the pending sidebar footer style correction and document frosted appearance, chat rendering, image previews, settings layout, and local MCP recovery. Record schema 52 backup guidance and 886 passing focused tests; Agent remains 0.15.1. Release note: 新增可选磨砂外观，改善聊天输入、图片预览和本地工具连接恢复，并整理设置与笔记布局。
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