修复 · Bug fixes
- 专注模式顶部留白合并（macOS）：标题栏并入官方红绿灯留白带（48px），会话标题与红绿灯同一行、正文从 48px 开始——正文起点 117px → 48px、首行内容 145px → 76px（-69px）；macOS 原生全屏 68px → 40px。普通浏览器布局逐像素不变。
Focus mode's title row is merged into the official macOS traffic-light band (48px): the title shares the line with the traffic lights and the transcript starts at 48px — content top 117 → 48 and first content 145 → 76 (-69px); native fullscreen 68 → 40. Plain-browser layout stays pixel-identical. - 窗口拖拽带在含内容的会话中失效：拖拽带改为 overlay 最后一个渲染的 app-region 矩形（滚动内容 / 右侧导航的 no-drag 矩形不再覆盖它），标题行内的「退出专注」按钮显式排除拖拽、保持可点。Windows 保持 40px 标题栏带（官方标题栏菜单绘制在其上层、需保持可见），标题行紧贴其下，正文 109px → 80px。
Fixed the window drag band dying on sessions with content — the band is now the overlay's last rendered app-region claim, and the exit control inside the title row is explicitly no-drag. On Windows the 40px caption band stays chrome (the official caption menubar paints above the overlay and must remain visible); the title row sits directly below it, transcript 109 → 80px.
测试 · Tests
- 桌面窗口 e2e：
desktop-frame.mjs131 条断言、drag-band.mjs44 条断言（按 Electron 的有序 app-region 命中规则模拟，覆盖滚动内容、合成控件翻转与真实点击）全部通过；header-toggle与input-caret（借用官方输入条 + 内置输入条）保持全绿。
Desktop-frame e2e now asserts 131 checks and the new drag-band regression 44 checks (ordered app-region hit-test emulation incl. scrolled content, a synthetic ordering flip and a real click); header-toggle and both input-caret modes stay green. - 真实 Electron 窗口（隔离实例、真实 preload、CDP）修改前后对比 55/55 通过：正文 117 → 48、首行 145 → 76、标题 x=88 与红绿灯同行、12/12 拖拽探测点可拖、退出按钮可点、无插件报错。
A real Electron window (isolated instance, real preload, CDP) passed 55/55 before/after checks: content top 117 → 48, first content 145 → 76, title at x=88 on the traffic-light line, 12/12 band probes draggable, exit clickable, no plugin errors. - 单测 129 全绿。
129 unit tests green.
Full Changelog: v0.13.0...v0.13.1